СПОСОБ И УСТРОЙСТВО ДЛЯ ВВОДА ЭЛЕКТРИЧЕСКОЙ ЭНЕРГИИ В ЭЛЕКТРИЧЕСКУЮ СЕТЬ ЭЛЕКТРОСНАБЖЕНИЯ

Изобретение относится к области электротехники и может быть использовано для управления генератором электрической энергии, подключенным в точке сетевого подключения к электрической сети. Техническим результатом является обеспечение стабильности сети за счет исключения потерь стабильности сети. Способ управления генератором (1) электрической энергии, подключенным в точке (2) сетевого подключения к электрической сети (4) электроснабжения, содержит этапы: регистрация по меньшей мере одного относящегося к точке (2) сетевого подключения сетевого свойства электрической сети (4) электроснабжения, управление генератором (1) таким образом, что он в зависимости от зарегистрированного сетевого свойства вводит ток в электрическую сеть (4) электроснабжения. 2 н. и 17 з.п. ф-лы, 9 ил.

СИНХРОННАЯ МАШИНА С ОБЩЕЙ СТУПЕНЬЮ УСТРОЙСТВА ВОЗБУЖДЕНИЯ ДЛЯ ДВИГАТЕЛЯ/ГЕНЕРАТОРА

Изобретение относится к области электротехники. Технический результат - повышение стабильности работы машины. Синхронная машина (100) имеет корпус (110), вал (115), основную секцию (120) и секцию (125) возбуждения. Основная секция (120) имеет статорную обмотку (130), которая установлена на корпусе, и роторную обмотку (135), которая установлена на валу. Секция возбуждения имеет трансформатор (140) и выпрямитель (145). Трансформатор имеет первичную обмотку (140А), установленную на корпусе, и вторичную обмотку (140В), установленную на валу. Выпрямитель установлен на валу и выпрямляет выходной сигнал вторичной обмотки для обеспечения подачи выпрямленного выходного сигнала на ротор. Блок (170) управления обеспечивает подачу высокочастотного сигнала управления на первичную обмотку. Этот сигнал магнитно соединяют с вторичной обмоткой, выпрямляют и затем подают на ротор для управления работой синхронной машины. 3 н. и 15 з.п. ф-лы, 3 ил.

Устройство питания систем компенсации электрических полей в ионных ловушках

Полезная модель относится к области электротехники, в частности к системам питания и распределения электрической энергии. Технический результат заключается в повышении точности и упрощении настройки выходного напряжения. Достигается тем, что заявленное устройство содержит набор последовательно соединенных батарей, входным контактом которого является контакт отрицательного потенциала первой из последовательно соединенных батарей, реостат, входной и выходной контакты которого подключены к контактам соответственно положительного и отрицательного потенциала последней батареи набора батарей, при этом плавающий контакт реостата является выходным контактом устройства с положительным потенциалом, а выходным контактом устройства с отрицательным потенциалом является контакт отрицательного потенциала первой из последовательно соединенных батарей. 3 з.п. ф-лы, 1 ил.

СПОСОБ И УСТРОЙСТВО ДЛЯ ВВОДА ЭЛЕКТРИЧЕСКОЙ ЭНЕРГИИ В ЭЛЕКТРИЧЕСКУЮ СЕТЬ ЭЛЕКТРОСНАБЖЕНИЯ

... 1. Способ управления генератором (1) электрической энергии, подключенным в точке (2) сетевого подключения к электрической сети (4) электроснабжения, содержащий этапы:- регистрации по меньшей мере одного относящегося к точке (2) сетевого подключения сетевого свойства электрической сети (4) электроснабжения,- управления генератором (1) таким образом, что он в зависимости от зарегистрированного сетевого свойства вводит ток в электрическую сеть (4) электроснабжения.2. Способ по п. 1, отличающийся тем, чтогенератор (1) является децентрализованным генератором (1) и/или ветроэнергетической установкой (1) или ветроэнергоцентром, включающим в себя несколько ветроэнергетических установок, и, в частности, осуществляет ввод энергии в сеть (4) электроснабжения посредством инвертора (16) напряжения.3. Способ по любому из пп. 1-2, в котором в качестве генератора (1) применяют по меньшей мере одну ветроэнергетическую установку (1), и причем для точки (2) сетевого подключения регистрируют чувствительность ...

СПОСОБ УПРАВЛЕНИЯ ЭЛЕКТРООБОРУДОВАНИЕМ ПРИ ПЕРЕГОНЕ ЭКСКАВАТОРА

Изобретение относится к электротехнике и предназначено для использования на горных предприятиях для повышения эффективности технологического процесса передвижения горных машин при использовании автономных дизель-генераторных станций. Техническим результатом является повышение надежности работы электрооборудования путем организации контроля рекуперированной энергии. В способе управления электрооборудованием при перегоне экскаватора постоянно измеряют мощность на вводе машины, которую сравнивают с двумя уставками:и Р=kР, где Ри η. Первая уставка Рсоответствует максимальной мощности, которая может быть обеспечена при торможении двигателем. Вторая уставка Рсоответствует максимальной мощности, которую может обеспечить дизель-генераторная станция. Диапазон мощности 0≤Р≤Рсоответствует нормальному режиму работы дизель-генераторной станции. Диапазон мощности Р≤Р≤0 соответствует допустимому режиму работы при рекуперации энергии со стороны нагрузки. В случае превышения активной мощностью значения ...

СПОСОБ И СИСТЕМА ДЛЯ УПРАВЛЕНИЯ ГИДРОЭЛЕКТРИЧЕСКИМИ ТУРБИНАМИ

... 1. Система массива гидроэлектрических турбин, содержащая:- массив турбинных систем, причем каждая турбинная система (10) содержит:- гидроэлектрическую турбину (16); и- систему управления, причем система управления имеет:- систему (20) преобразователя, выполненную с возможностью преобразования мощности переменного тока (АС), подаваемой генератором (18), соединенным с гидроэлектрической турбиной (16), и имеющей напряжение и частоту, которые зависят от частоты вращения гидроэлектрической турбины, в мощность переменного тока, имеющую напряжение и частоту системы (22) передачи для передачи мощности переменного тока к приемной подстанции и- модуль (32) управления, при этом модуль управления выполнен с возможностью взаимодействия с системой (20) преобразователя, чтобы регулировать напряжение переменного тока, подаваемого генератором; и- управляющий контроллер (54), при этом управляющий контроллер выполнен с возможностью определения уровня производительности множества гидроэлектрических турбин ...

СПОСОБ И СИСТЕМА ДЛЯ УПРАВЛЕНИЯ ГИДРОЭЛЕКТРИЧЕСКИМИ ТУРБИНАМИ

... 1. Система управления для управления работой гидроэлектрической турбины (16), причем система управления содержит:систему (20) преобразователя, выполненную с возможностью преобразования мощности переменного тока (AC), подаваемой генератором (18), соединенным с турбиной (16), и имеющей напряжение и частоту, которые зависят от скорости вращения турбины, в мощность переменного тока, имеющую напряжение и частоту системы (22) передачи, для передачи мощности переменного тока к приемной подстанции;причем система дополнительно содержит модуль (32) управления, при этом модуль управления выполнен с возможностью взаимодействия с системой (20) преобразователя, чтобы регулировать напряжение переменного тока, подаваемого генератором в зависимости от скорости потока воды через турбину (16), для управления таким образом вращением турбины;причем система преобразователя содержит преобразователь (26) первой ступени и преобразователь (28) второй ступени, при этом между преобразователями первой ступени и второй ...

СИНХРОННАЯ МАШИНА С ОБЩЕЙ СТУПЕНЬЮ УСТРОЙСТВА ВОЗБУЖДЕНИЯ ДЛЯ ДВИГАТЕЛЯ/ГЕНЕРАТОРА

СПОСОБ И СИСТЕМА ДЛЯ УПРАВЛЕНИЯ ГИДРОЭЛЕКТРИЧЕСКИМИ ТУРБИНАМИ

... 1. Система управления для управления работой гидроэлектрической турбины (16), причем система управления содержит:систему (20) преобразователя, выполненную с возможностью преобразования мощности переменного тока (АС), подаваемой генератором (18), соединенным с турбиной (16), и имеющей напряжение и частоту, которые зависят от скорости вращения турбины, в мощность переменного тока, имеющую напряжение и частоту системы (22) передачи, для передачи мощности переменного тока к приемной подстанции;причем система дополнительно содержит модуль (32) управления, при этом модуль управления выполнен с возможностью взаимодействия с системой (20) преобразователя, чтобы регулировать напряжение переменного тока, подаваемого генератором в зависимости от скорости потока воды через турбину (16), для управления, таким образом, вращением турбины;причем система преобразователя дополнительно содержит преобразователь (26) первой ступени и преобразователь (28) второй ступени, при этом между преобразователями первой ...

WECHSELSTROMGENERATOR UND DARIN ENTHALTENER GLEICHRICHTER

Ein Wechselstromgenerator und ein dazu gehöriger Gleichrichter werden bereitgestellt. Der Gleichrichter enthält einen Gleichrichtertransistor, eine Gate-Treiberschaltung und eine Spannungsklemmschaltung. Der Gleichrichtertransistor erzeugt eine gleichgerichtete Spannung entsprechend einer Eingangsspannung und wird durch eine Gatespannung gesteuert. Die Gate-Treiberschaltung erzeugt die Gatespannung entsprechend einer Differenz zwischen der gleichgerichteten Spannung und der Eingangsspannung. Die Gate-Treiberschaltung stellt die Gatespannung in einem ersten Zeitintervall bereit, wenn die Differenz kleiner als die erste vorbestimmte Schwellenspannung ist, und macht die Differenz gleich der ersten Referenzspannung. Die Gate-Treiberschaltung stellt die Gatespannung in einem zweiten Zeitintervall ein und die Differenz ist gleich der zweiten Referenzspannung. In dem zweiten Zeitintervall klemmt die Spannungsklemmschaltung die Gatespannung, indem sie die Differenz mit der dritten Referenzspannung ...

Externes Leistungszuführungssystem

Ein externes Leistungszuführungssystem enthält eine elektrische Speichervorrichtung (B), einen Motor, einen Wechselrichter, welcher den Motor unter Verwendung von elektrischer Leistung der elektrischen Speichervorrichtung (B) antreibt, und eine Steuerungsvorrichtung (50), welche den Wechselrichter steuert. Der Wechselrichter (21) enthält ein erstes Schaltelement und ein zweites Schaltelement, welche zwischen einer positiven Elektroden-Leistungs-Zuführungsleitung (PL2) und einer negativen Elektroden-Leistungs-Zuführungsleitung (NL) in Reihe zueinander geschaltet sind. Ein Verbindungsknoten des ersten Schaltelements und des zweiten Schaltelements ist mit einer entsprechenden Spule von Statorspulen verbunden. Die Steuerungsvorrichtung (50) gibt Antriebssignale zu dem Wechselrichter (21) ein, um den Wechselrichter (21) derart anzutreiben, dass eine Spannung bei dem Neutralpunkt zu einem vorbestimmten Wert wird. Die Steuerungsvorrichtung (50) kompensiert die Antriebssignale in einer Totzeit-Phase ...

Windenergieanlage mit leistungsabhängiger Filtereinrichtung

Die Erfindung betrifft eine Windenergieanlage (100) zum Erzeugen einer elektrischen Leistung zum Einspeisen in ein elektrisches Versorgungsnetz, umfassend einen mehrphasigen Generator (200), insbesondere einen Synchrongenerator, zum Erzeugen elektrischer Leistung, wobei der Generator einen mehrphasigen Generatorstrom (I, I, I) erzeugt, und wobei der Generator einen Generatorausgang (201) zum Abgeben des mehrphasigen Generatorstroms aufweist, eine an den Generatorausgang angeschlossene Filtereinrichtung (204, 206) zum Erzeugen eines Filterstroms (I) zum Beeinflussen des Generatorstroms, insbesondere zum Reduzieren elektrischer Schwingungen des Generatorstroms, wobei der erzeugte Filterstrom von der erzeugten Leistung des Generators abhängig ist, und die Filtereinrichtung umfasst wenigstens eine Kapazität (208) zum Beeinflussen des Filterstroms, und wenigstens eine der Kapazität in Serie vorgeschaltete Drosselspule (210) zum Beeinflussen des Filterstroms, wobei die Drosselspule einen Sättigungsstromwert ...

HYBRIDFAHRZEUGANTRIEBSSTRANG MIT ISOLIERTEM ZWEIFACHBUS

Diese Offenbarung stellt einen Hybridfahrzeugantriebsstrang mit isoliertem Zweifachbus bereit. Ein Antriebsstrang für ein Fahrzeug beinhaltet einen sterngewickelten Generator und einen sterngewickelten Motor, die über jeweilige Neutralleiteranschlüsse gekoppelt sind, einen Generatorwechselrichter, der zwischen dem sterngewickelten Generator und einem Generatorbus gekoppelt ist, und einen Motorwechselrichter, der zwischen dem sterngewickelten Motor und einem Motorbus gekoppelt ist. Der Antriebsstrang beinhaltet ferner eine Traktionsbatterie, die einen ersten und zweiten Anschluss aufweist, die jeweils wahlweise mit den Neutralleiteranschlüssen gekoppelt sind. Der zweite Anschluss ist ferner mit Busanschlüssen des Generator- und Motorbusses gekoppelt.

Wechselstromgenerator und diesen verwendendes Fahrzeug

Method for operating generator utilized for generating electricity in hybrid vehicle, involves operating generator depending on electrical energy quantity to be produced during operation of vehicle on predetermined driving route

The method involves determining an energy requirement to be expected for operating a vehicle on a predetermined driving route, where the driving route is divided into multiple sections. An electrical energy quantity to be expected is determined depending on the energy requirement to be expected during operation of vehicle on the predetermined driving route. A generator is operated depending on the electrical energy quantity to be produced during operation of vehicle on predetermined driving route. An independent claim is also included for a programmatically arranged device for guiding a computer program to implement a method for operating a generator.

Improvements in the over-speed protection of power systems

... 566,992. Electric control systems. GENERAL ELECTRIC CO., Ltd., ABBOTT, A., GARRARD, C. J. O., and FRIEDLANDER, E. July 26, 1943, Nos. 12116 and 15981. [Class 40 (i)] [Also in Groups XXVI and XXXVII] The load on a prime mover and the supply of working fluid thereto are caused to move a balancing means in opposite directions ; movement caused by relative excess of supply effects a reduction to prevent over-speeding and movement in the opposite direction may in some cases be caused to increase the supply. In the apparatus shown, a wattmeter 9 measuring the power dissipated in the (electrical) load drives a sun-wheel 1, while a second sun-wheel 2 is driven by a wattmeter fed from an independent supply, the current coil of which is fed through a rheostat 19 controlled by the fluid supply of the prime mover ; the independent electric supply may also serve the relay 14 operating the throttle. The two sun-wheels drive planetwheels 3 when the speeds of the sun-wheels are caused to differ by disparity ...

Resonant commutation system for exciting a three-phase alternator

Controller

Generator control having grid imbalance detector

A controller 101 for one or more generators, for example doubly fed induction generators (DFIG) attached to a wind-turbine 100, where each generator has voltage source converters 110, 112 connected on its rotor side for controlling the power at its output side. An imbalance detector 116 detects any imbalance in the grid served by the generators and the voltage source converters are controlled accordingly. Processing means 118 are provided for calculating the current orders for both positive and negative sequences according to a required active power output and these are communicated to the controllers of the voltage source converters. A plurality of DFIGs (e.g. a wind farm) may be provided (100a-g, Figure 2) having a system controller (200, figure 2).

An electrical power generating system and a permanent magnet generator for such a system

Self-tuning energy harvester

Polyphase switched reluctance machines

Improvements in and relating to protective devices for prime movers

... 764,608. Indicating working conditions. BRITISH BROADCASTING CORPORATION. June 1, 1955 [June 14, 1954], No. 17472/54. Class 7 (2). [Also in Group XXVI] A prime mover is provided with means responsive to the relationship between the fuel supply to the prime mover and the power output of the prime mover, over a wide range of power output, to give a visual or audible indication or to stop the prime mover or to reduce the fuel supply to a low value, when the ratio of the fuel supply to the output power exceeds a predetermined value, as will occur if, for example, there is an increase in friction in the prime mover. As described applied to a diesel engine driving an electrical generator, when an increase in load on the generator decreases the speed of the engine a centrifugal governor acts on the fuel pump to increase the fuel supply ; the governor is mechanically coupled to a potentiometer 11 so that the current supply to a coil 19 is also increased. Increase in current in the coil 19 exerts ...

FREQUENCY CONVERTERS

... 1464778 Frequency changing ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI 2 April 1974 [2 April 1973] 14535/74 Heading H2F A frequency changer comprises 3 threephase bridges of thyristors T11 ... T92 connected as shown to two sets of secondary windings S1, S2 of a three phase transformer and to a three-phase load such as a synchronous motor MS. A futher circuit including a smoothing inductor L and six diodes or thyristors T1 ... T6 is connected between the two sets of secondary windings S1, S2. As described, the circuit including inductor L may include a D.C. circuit breaker and may provide excitation for the synchronous motor MS. Harmonics may be reduced by connecting one of the sets S1, S2 of secondary windings in delta. Fig. 1 (not shown) relates to a frequency changer having the transformer replaced by a balanced three-phase choke. The power factor is improved by the auxiliary thyristors or diodes.

POWER SYSTEM

Power system.

Power system.

Power system.

FREE PISTON STIRLING ENGINE PRICE INCREASE

KRAFTWERKSBLOCK

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

FREE PISTON STIRLING ENGINE PRICE INCREASE

Method and system for controlling hydroelectric turbines

A control system for controlling an operation of a hydroelectric turbine. The control system comprises a converter system to convert AC power, supplied by a generator connected to the turbine, and having a voltage and frequency that is a function of a rotational speed of the turbine, to AC power having a voltage and frequency of a transmission system for transmitting the AC power to a receiving station. The system further comprises a control unit that is arranged to co-operate with the converter system to adjust the AC voltage supplied by the generator in response to a water flow speed through the turbine to thereby control rotation of the turbine. The converter system comprises a first-stage converter and a second-stage converter, with a DC link provided between the first and second-stage converters. The first-stage converter is arranged to convert the AC power supplied by the generator to DC power. The second-stage converter is arranged to convert the DC power to the AC Power for transmission ...

Dynamic braking system for an electric power system and method of operating the same

A dynamic braking system for an electric power system includes a switching device coupled to an electrical conductor. The switching device is configured to open and close with a plurality of predetermined frequencies. The dynamic braking system also includes an inductive device coupled to the switching device. The power losses of the inductive device are at least partially a function of the plurality of predetermined frequencies. The dynamic braking system further includes a dynamic braking controller coupled to the switching device. The dynamic braking controller is configured to open and close the switching device with at least one of the predetermined frequencies to dissipate electric power from the electrical conductor at a predetermined rate by regulating the power losses of the inductive device as a function of the predetermined frequencies.

Method for controlling a wind energy plant

Wind power plant

Operation of a local AC power supply system with a genset and a UPS

To operate a local AC power supply system (1) with a genset (6), which comprises an internal combustion engine (8) and a generator (7), and an uninterruptible power supply (USV) (2), which comprises an energy store (15), the genset (6) is controlled to a setpoint frequency by using the genset (6) to respond to deviations in a frequency of an AC voltage of the AC power supply system (1) from the setpoint frequency with a power increase in one direction and with a power reduction in the other direction. The frequency of the AC voltage applied to the genset (6) by the AC power supply system (1) is prescribed using the UPS (2), the frequency of the AC voltage prescribed using the UPS (2) being changed in one direction away from the setpoint frequency if the present power demand rises above a present power supply in the AC power supply system (1) and being changed in the other direction if the present power demand falls below the present power supply in the AC power supply system (1). When the ...

A rotary electric machine

ADVANCED CROSS-CURRENT COMPENSATION SYSTEM AND METHOD FOR ENHANCING REACTIVE CURRENT SHARING IN POWER GENERATION HAVING MULTIPLE GENERATORS

The present system and method provides a cross-current compensation control system that provides for improved load sharing performance during the parallel operation of multiple generators through use of a Proportional Integral PI controller or a Proportional Integral Differential PID controller eliminating steady state error in reactive current sharing, with such providing a stable and robust response with uncertain variations of equipment in the power system through improved cross-current compensation when various system parameter uncertainties exist.

ELECTRIC MACHINE

The invention includes an electric machine (10) having a rotor (12), stator (20) and at least one winding (22) in the stator (20) adapted to conduct a current, and a secondary winding (24), electrically isolated from the first winding (22) and inductively coupled to the first winding (22), which may be used to control at least one of the output voltage and current of the first winding (22).

ELECTRIC MACHINE WITH PRIMARY AND SECONDARY STATOR WINDINGS

... ²²²The invention includes an electric machine (10) having a rotor (12), stator ²(20) and at least one winding (22) in the stator (20) adapted to conduct a ²current, and a secondary winding (24), electrically isolated from the first ²winding (22) and inductively coupled to the first winding (22), which may be ²used to control at least one of the output voltage and current of the first ²winding (22).² ...

FAULT CLEARING METHOD FOR PERMANENT MAGNET MACHINES

A permanent magnet machine (PMM) has a kinetic portion (12) electrically coupled to a power conversion portion (14). Motive power is provided to the kinetic portion (12) by a torque applied to a motive shaft coupled to a prime mover, such as an aircraft engine or an automobile engine. A control circuit includes a switch (40) disposed between the kinetic portion (12) and output feeder cables of the power conversion portion. A first sensor (50) is effective to detect a first fault condition in either the feeder cables or the power conversion portion (14) and a second sensor (54) is effective to detect a second fault condition in the kinetic energy portion (12). The first sensor (50) is effective to open the switch (40) when a first fault condition is detected and the second sensor (54) is effective to apply a voltage to a winding (26a, 26b, 26c) within the kinetic portion (12) generating an opposing counter torque on the motive shaft where a combination of torque and counter torque exceeds ...

METHOD FOR CONTROLLING A SYNCHRONOUS GENERATOR OF A GEARLESS WIND ENERGY TURBINE

The invention relates to a method for controlling a synchronous generator of a gearless wind energy turbine. Said synchronous generator comprises an electrodynamic rotor and a stator, for generating electrical power by rotating the rotor with respect to the stator. Said method comprising the following steps: generating a multi-phase output current on the stator, feeding the output current to a rectifier, controlling the output current by means of the rectifier such that torque ripple of the generator is reduced.

METHOD AND SYSTEM FOR CONTROLLING HYDROELECTRIC TURBINES

A control system for controlling an operation of a hydroelectric turbine. The control system comprises a converter system to convert AC power, supplied by a generator connected to the turbine, and having a voltage and frequency that is a function of a rotational speed of the turbine, to AC power having a voltage and frequency of a transmission system for transmitting the AC power to a receiving station. The system further comprises a control unit that is arranged to co-operate with the converter system to adjust the AC voltage supplied by the generator in response to a water flow speed through the turbine to thereby control rotation of the turbine. The converter system comprises a first-stage converter and a second-stage converter, with a DC link provided between the first and second-stage converters. The first-stage converter is arranged to convert the AC power supplied by the generator to DC power. The second-stage converter is arranged to convert the DC power to the AC Power for transmission ...

WIND ENERGY INSTALLATION AND METHOD FOR OPERATING A WIND ENERGY INSTALLATION WITH TEMPERATURE MONITORING FOR THE TRANSFORMER

The invention relates to a wind turbine having a generator (19) for generating electrical energy and a transformer (20). The transformer (20) is designed to receive electrical energy from the generator (19) on a secondary side (29) and to discharge said electrical energy again on a primary side (28) at a higher voltage. The wind turbine also comprises a temperature monitoring means (26, 27) for the transformer (20). According to the invention the voltage supply to the temperature monitoring means is fed from the primary side (28) of the transformer (20). The temperature monitoring means (26, 27) is thereby independent of the control system (21) of the wind turbine. The temperature monitoring means (26, 27) according to the invention reduces the risk of the transformer (20) overheating. The invention also relates to a method for operating such a wind turbine.

ELECTRICAL MACHINE WITH PRIMARY AND SECONDARY STATOR WINDINGS

The invention includes an electric machine (10) having a rotor (12), stator (20) and at least one winding (22) in the stator (20) adapted to conduct a current, and a secondary winding (24), electrically isolated from the first winding (22) and inductively coupled to the first winding (22), which may be used to control at least one of the output voltage and current of the first winding (22).

A DC MOTOR/GENERATOR WITH ENHANCED PERMANENT MAGNET FLUX DENSITIES

This disclosure relates in general to a new and improved electric motor/generator, and in particular to an improved system and method for producing rotary motion from a electro-magnetic motor or generating electrical power from a rotary motion input by concentrating magnetic forces due to electromagnetism or geometric configurations.

Vorrichtung zum Antrieb langsamer laufender Generatoren durch schneller drehende Kraftmaschinen.

Einrichtung zum selbsttätigen Konstanthalten der Leistung von Verbrennungsmotoren auf Fahrzeugen mit elektrischer Kraftübertragung.

Gleichstromgenerator mit Nebenschluss- oder Fremderregung und Hauptstromerregerwicklung.

Brennkraftmaschinenanlage, insbesondere für Fahrzeuge, mit aus Tachometer und Wattmeter bestehendem Anzeigegerät für Leistung und Drehzahl eines mit dem Verbrennungsmotor gekuppelten Generators.

Ferneinstellvorrichtung für eine Drehzahlverstellvorrichtung.

Regeleinrichtung mit Servomotor.

Elektrische Anlage für elektrisch angetriebene gleislose Fahrzeuge.

Anordnung zur Erzeugung einer Steuerwirkung in Abhängigkeit von der Differenz der Wirkströme bzw. Wirkspannungen oder der Blindströme bzw. Blindspannungen zweier Scheinleistung aufweisender elektrischer Verbraucher

Begrenzungsanordnung in einer Leistungsregel- oder Leistungssteuereinrichtung eines Motors

Uberwachungseinrichtung für den Betrieb von Brennkraftmaschinenanlagen mit elektrischer Leistungsübertragung, insbesondere für Fahrzeuge.

Synchronisiereinrichtung für elektrische Krafterzeugungsanlagen und Verfahren zu ihrem Betrieb

Dispositif de régulation de puissance d'un groupe électrogène à moteur thermique

Vorrichtung zum Starten von Verbrennungsmotoren für Fahrzeuge

MECHANISM FOR THE EXCITATION OF A FIELD COIL OF AN ELECTRICAL, ROTARY MACHINE.

ROTARY ELECTRICAL MACHINE

УСТРОЙСТВО ЭЛЕКТРИЧЕСКОГО ГЕНЕРАТОРА ИЛИ ДВИГАТЕЛЯ

Устройство электрического генератора или двигателя содержит приводной вал, ротор, выполненный с возможностью вращения на упомянутом приводном валу, упомянутый ротор содержит первую группу разнесенных по окружности магнитов, соединенных с первой стороной упомянутого ротора, статор, содержащий первую группу разнесенных по окружности электрически проводящих обмоток, соединенных с первой стороной упомянутого статора. Приводной вал проходит через упомянутый статор, упомянутая первая сторона упомянутого статора расположена рядом с упомянутой первой стороной упомянутого ротора, а упомянутый ротор и упомянутый статор установлены, по существу, в параллельных плоскостях. Каждая из электрически проводящих обмоток размещена с иным интервалом от упомянутого приводного вала, чем упомянутые магниты на упомянутом расположенном рядом роторе, и намотана на сердечник, расположенный по одной линии с радиальной осью, продолжающейся наружу в радиальном направлении относительно упомянутого приводного вала. Ротор ...

ВРАЩАЮЩАЯСЯ ЭЛЕКТРИЧЕСКАЯ МАШИНА

... 1. Вращающаяся электрическая машина переменного тока, предназначенная для непосредственного подключения к распределительной или магистральной сети, содержащая систему бесщеточного возбуждения и, по меньшей мере, одну электрическую обмотку, отличающаяся тем, что обмотка выполнена из кабеля, имеющего, по меньшей мере, одну токопроводящую жилу, изоляция которого содержит внутренний слой, обладающий полупроводниковыми свойствами, промежуточный твердый изоляционный слой и внешний слой, обладающий полупроводниковыми свойствами, при этом система бесщеточного возбуждения выполнена с возможностью переключения между положительным и отрицательным возбуждением. 2. Машина по п.1, отличающаяся тем, что внешний слой изоляции выполнен с возможностью соединения с источником заранее заданного потенциала. 3. Машина по п.2, отличающаяся тем, что внешний слой изоляции выполнен с возможностью заземления. 4. Машина по любому из предыдущих пунктов, отличающаяся тем, что, по меньшей мере, два соседних слоя обмотки ...

Biomechanics generator

ROTARY ELECTRIC MACHINE FOR VEHICLE

Machine électrique rotative pour véhicule qui comprend un induit (12) ayant un noyau d'induit (20) et un enroulement d'induit (21) enroulé autour du noyau (20) pour générer une tension de sortie pour charger une batterie ; un rotor (8) ayant un noyau de rotor (19) avec un enroulement de champ (16) enroulé autour de celui-ci et des aimants permanents (22a, 22b) pour fournir un flux magnétique au noyau (20) ; et une section de commande de la tension (15) qui ajuste la tension de sortie de l'induit (12) en commandant le courant d'excitation sur la base de la valeur d'une tension de sortie de l'enroulement (21) et de la valeur et de la direction de l'écoulement du courant d'excitation s'écoulant à travers l'enroulement (16).

Auxiliary attachment for systems of mixed regulation of turbine generator sets

DEVICE OF REGULATION Of a SYNCHRONOUS GENERATOR WITHOUT BRUSHES

L'invention concerne un dispositif de régulation d'un alternateur synchrone sans balais comprenant une excitatrice tournante à inducteur d'excitation fixe caractérisé en ce qu'il comporte en combinaison un étage de puissance (4) relié à l'alternateur, un circuit analogique de régulation (5) relié à l'étage de puissance (4), pour la régulation de plusieurs paramètres, un circuit numérique de régulation (6) relié à l'étage de puissance (4), pour la régulation de plusieurs paramètres, et un circuit de commande (7) destiné à permettre le fonctionnement du dispositif de régulation suivant deux modes, à savoir un mode normal dans lequel la fonction de régulation est réalisée par le circuit numérique de régulation (6) et un mode dit "dégradé" dans lequel la fonction de régulation est réalisée par le circuit analogique de régulation (5), le circuit numérique de régulation (6) étant isolé notamment mécaniquement et/ou magnétiquement de l'alternateur et étant relié au circuit de commande (7) par ...

METHOD AND SYSTEM FOR CONTROLLING THE PROGRESSIVE CHARGE OF A MOTOR VEHICLE ALTERNATOR, AND A MOTOR VEHICLE ALTERNATOR COMPRISING SUCH A SYSTEM

Le procédé selon l'invention est mis en œuvre dans un alternateur fournissant une tension d'alimentation qui est asservie à une valeur de consigne au moyen d'une boucle de régulation contrôlant un courant d'excitation de l'alternateur à travers une modulation de largeur d'impulsion de ce courant. Le procédé limite le prélèvement de couple par l'alternateur sur le moteur thermique du véhicule dans une phase de réponse progressive (LRC_Ph) à une chute de la tension d'alimentation supérieure à un seuil d'enclenchement prédéterminé en n'autorisant que des augmentations progressives d'un rapport cyclique courant (DC_EXC) du courant d'excitation à partir d'un rapport cyclique initial (DC_I) jusqu'à un rapport cyclique attendu calculé par la boucle de régulation. Conformément à l'invention, au début de la phase de réponse progressive, le rapport cyclique initial est augmenté d'un saut prédéterminé uniquement si la boucle de régulation ne présente pas un acyclisme.

Electrical supply system

L'invention a pour objet la commande d'un système d'alimentation électrique avec commutation entre deux programmes aussi rapidement que possible, notamment en cas de panne d'un générateur électrique. Le système décrit comporte deux générateurs (10, 20) alimentant plusieurs appareils (101 à 106, 201 à 206), ainsi qu'une unité de traitement (3) qui commande la déconnexion de certains appareils si la demande dépasse la capacité d'alimentation. L'unité de traitement comporte un commutateur matériel (35) commandé par des signaux issus des générateurs (10, 20). L'unité de traitement exécute deux programmes différents A et B en même temps, mais les résultats d'un seul sont transmis à un étage de sortie (34) par le commutateur (35). Lorsqu'il faut déconnecter des appareils, le commutateur transmet les résultats de l'autre programme à l'étage de sortie. Lorsqu'une alimentation suffisante est rétablie, le commutateur revient à son état initial pour transmettre les résultats du premier programme.

ENGINE WORKING MACHINE

sistema e método para um recurso de antecipação de carga e seu método de regulagem para um conjunto de geração

Fluid power generating apparatus and method for controlling the same

Provided is a fluid power generating apparatus that is capable of matching energy a fluid received by a rotor with electric energy output from a power generator. The fluid power generating apparatus is provided with a driving unit 24 for moving at least one of a stator 7 of the power generator 8 and the rotor 9 in the axial direction of the rotation axis 4 thereby to change the overlap length such that the stator 7 and the rotor 9 overlap one another. A fluid speed measuring unit 6 measures the speed of the fluid, and a controller 10 controls the overlap length of the power generator 8 based on the measured speed of the fluid and predetermined relations between speeds of the fluid and indices of the overlap length of the power generator 8 (contact ratio).

POWER SYSTEM

Roterande elektrisk maskin, maskin innefattande minst en roterande elektrisk huvudmaskin och elkraftanläggning innefattande en roterande elektrisk maskin jämte förfarande för magnetisering av en roterande elektrisk maskin

METHOD FOR CONTROLLING A WIND ENERGY PLANT

SYSTEM AND METHOD FOR PROVIDING BALLAST LOADING FOR A TURBO-GENERATOR

A ballast load (38) control system and method is presented that regulates the output electrical power supplied by a turbo-generator (18) such that appropriate turbine loading may be achieved. Such enables the use of a turbo-generator (18) having an expansion turbine to be used to provide a controlled, required amount of cooling to a thermal control system. By effectively varying the coupled electrical load (38, 40), the loading provided to the expansion turbine may be controlled while maintaining output power requirements to connected electrical utilization equipment. Use of a common system controller (22) for both the cooling system and ballast trim load system of the present invention ensures coordinated operation between the required amount of cooling and electrical power quality supplied to the coupled utilization equipment.

DEVICE FOR REGULATING THE VOLTAGE IN GENERATORS BY MEANS OF COIL TAPPING AND A CONTROL RELAY

The invention relates to a device for automatically regulating the voltage of a generator according to the load current. Said device comprises a first couple of clamps which can be connected to a couple of generator clamps carrying the load current and taps a first generator voltage from the generator coil, a second couple of clamps which can be connected to the couple of generator clamps and picks up a second generator voltage that is smaller than the first generator voltage from the generator coil, a third couple of clamps that supplies a control voltage to a control circuit which is provided with a control relay (9) having a switch for switching the connection between the couple of generator clamps and the first couple of clamps or the second couple of clamps. The couple of generator clamps, which is connected to the first couple of clamps by means of the switch, is connected to the second couple of clamps if the control voltage is greater than or equal to an upper threshold voltage ...

Generator field exciter system

A method to provide control for an alternating current generator. The method includes controlling the alternating current generator by modulating a three-phase wound rotor to counter-rotate the magnetic field relative to a shaft rotation, or alternatively to become synchronous to the shaft rotation. The three-phase wound rotor controls a frequency and a voltage of the alternating current generator.

WIND ENERGY INSTALLATION AND METHOD FOR OPERATING A WIND ENERGY INSTALLATION WITH TEMPERATURE MONITORING FOR THE TRANSFORMER

A wind turbine having a generator for generating electrical energy and a transformer is disclosed. The transformer is designed to receive electrical energy from the generator on a secondary side and to discharge said electrical energy again on a primary side at a higher voltage. The wind turbine also comprises a temperature monitoring means for the transformer. The voltage supply to the temperature monitoring means is fed from the primary side of the transformer. The temperature monitoring means is thereby independent of the control system of the wind turbine. The temperature monitoring means reduces the risk of the transformer overheating. A method for operating such a wind turbine is also disclosed. 1. A wind energy installation comprising a generator configured to generate electrical energy , a transformer configured to receive electrical energy from the generator on a secondary side and to output said electrical energy again at a higher voltage on a primary side , and a temperature-monitoring system for the transformer , wherein the voltage supply for the temperature-monitoring system is fed from the primary side of the transformer.2. The wind energy installation of claim 1 , comprising a voltage transformer configured to convert the voltage present on the primary side of the transformer into a suitable auxiliary operating voltage for the temperature-monitoring system.3. The wind energy installation of claim 1 , wherein the temperature-monitoring system comprises a PTC thermistor and a PTC thermistor triggering device.4. The wind energy installation of wherein the temperature-monitoring system is configured to isolate the primary side of the transformer from the mains in the event that a predefined temperature limit value is exceeded.5. The wind energy installation of wherein the temperature-monitoring system is configured to put a cooling system for the transformer into operation in the event that a predefined temperature limit value is exceeded.6. The wind ...

NINE PHASE INDUCTION MOTOR STARTER/ALTERNATOR

An electrical induction motor may include nine terminals configured to receive nine current inputs from nine output phases of a nine phase inverter. The motor may include nine windings connected to the nine terminals, and a plurality of contactors, wherein each of the plurality of contactors may be selectively opened or closed in a circuit including the nine windings to selectively connect the windings together in one of a mesh configuration or a star configuration. Each of the windings may be selectively connected between two of the nine current inputs, with a phase angle difference between the two current inputs of 40 degrees. Each of the contactors may be selectively opened or closed to establish a span value for the mesh configuration of two, with two being the number of inverter output phases between a terminal of one of the nine windings and a terminal of another of the nine windings connected to the one of the nine windings. The motor may selectively receive a first one of the harmonics of a drive waveform generated by the nine phase inverter and a second, different one of the harmonics of the drive waveform generated by the nine phase inverter. 1. An electrical induction motor , comprising:nine separate terminals configured to receive nine separate current inputs from nine output phases of a nine phase inverter;nine windings connected to the nine separate terminals;a plurality of contactors, each of the plurality of contactors being configured to be selectively opened or closed in a circuit including the nine windings to selectively connect the nine windings together in one of a mesh configuration or a star configuration;each of the nine windings being configured to be selectively connected between two of the nine separate current inputs, with a phase angle difference between the two separate current inputs of 40 degrees;each of the plurality of contactors being further configured to be selectively opened or closed to establish a span value for the mesh ...

Stored electrical energy assisted ram air turbine (RAT) system

A system for providing alternating current (AC) power to an aircraft component includes a ram air turbine (RAT) configured to generate AC power. The system also includes an energy storage device configured to output direct current (DC) power. The system also includes an inverter configured to convert the DC power to the AC power. The system also includes a controller coupled to the RAT and the inverter and configured to cause the inverter to provide the AC power to the aircraft component, and to control the RAT to provide the AC power to the aircraft component in response to determining that the RAT can provide the AC power.

Wind Turbine For Facilitating Laminar Flow

Vertical axis wind turbines are provided having foil design and geometry that facilitates lift, torque and laminar flow along a 360 degree radial. Contemplated foils are non-planar, and have a chord length that is at least three times greater than a distance between a trailing end of a leading foil, and a leading end of a trailing foil. Additionally or alternatively, the foils are located away from a turbine axis at a distance that is about 2.9-3.5 times greater than a chord length of the foils. In some embodiments, the foils are circumferentially distributed via one or more laminar stall vanes.

Generator with built-in voltage controller inside a motor having a changeover knife switch configuration and loops

A generator includes: a built-in voltage controller disposed inside the housing of the motor and connected to the stator; a loop changeover switch, wherein one side of the three groups of loop polar phase contact points is connected to the current output unit through three phase lines, and the other side is connected to the current output unit through three loop lines; a three-phase short-circuit changeover switch is in a spaced arrangement with the loop changeover switch and includes three groups of short-circuit polar phase contact points, one side of which is connected to each other through short-circuit wire, and the other side is connected to each phase line; three converted-voltage output lines, wherein one end electrically connected to the loop polar phase contact points of the loop changeover switch is connected to one side of the loop lines; the other end is used to connect to a power device.

Apparatus and systems for engine and generator control within an aircraft

A system is provided for engine and generator control. The system includes a compound AC generator, a generator control unit (GCU) module and an engine electronic controller (EEC) module. The compound AC generator includes a shaft, and a permanent magnet generator (PMG) configured to be driven by the shaft to generate an AC power signal. The GCU module is configured to control the compound AC generator. The PMG is coupled to the GCU module and the EEC module such that it is configured to simultaneously supply the AC power signal to the GCU module and to the EEC module.

SYSTEM AND TECHNIQUES FOR TRANSMISSION INTEGRAL GENERATOR/LINE INTERFACE UNIT MAGNETICS INTEGRATION

A power system may generate electrical power or receive an alternating current from an external power source via a port. The power system may configure a plurality of contactors in a partial line switching unit to unlink a plurality of generator windings of a transmission integral generator wherein the plurality of generator windings are connected to the port through the partial line interface switching unit. The power system may condition the current as the current flows through the plurality of generator windings, wherein the plurality of generator windings produce an impedance to support an active rectification process by a machine controller. The rectified output is then made available for distribution. The power system may accept direct current for use in an inversion process by a machine controller. The plurality of generator windings can form part of a low-pass LC filter to condition the alternating current resulting from the inversion process.

ALTERNATOR VOLTAGE REGULATOR WITH A PROGRAMMABLE SIGNAL PROCESSING INTERFACE

Method and device for decelerating an underwater power station

The invention concerns a method for the operation of an underwater powerplant comprising a water turbine for purposes of absorbing kinetic energy from a flow of water; an electrical generator with converter feed, whose generator rotor is connected in a torsionally rigid manner with the water turbine, wherein the invention is characterised in that in normal operation a first frequency converter is used for purposes of converter feed, and in the braking operation at least one second frequency converter, or one component of a second frequency converter, is connected into the circuit and synchronised with the first frequency converter, in order to execute with the latter in a combined manner a converter feed to the electrical generator, which generates a generator torque braking the water turbine.

Polyphasic multi-coil electric device

A polyphasic multi-coil generator includes a driveshaft, at least first and second rotors rigidly mounted on the driveshaft so as to simultaneously synchronously rotate with rotation of the driveshaft, and at least one stator sandwiched between the first and second rotors. The stator has an aperture through which the driveshaft is rotatably journalled. A stator array on the stator has an equally circumferentially spaced-apart array of electrically conductive coils mounted to the stator in a first angular orientation about the driveshaft. The rotors and the stator lie in substantially parallel planes. The first and second rotors have, respectively, first and second rotor arrays.

Rotating Electrical Machine Abnormal State Detection Method and Apparatus and Wind Driven Generating System Using the Same

A rotating electrical machine abnormal state detection apparatus is provided. The apparatus includes: a current signal acquisition unit, coupled to a rotating electrical machine, for acquiring a set of real-time current waveforms from the rotating electrical machine; a state characteristic database, pre-storing a plurality of abnormal state characteristics which respectively correspond to a plurality of abnormal states; and an abnormal state detection unit, coupled to the current signal acquisition unit and the state characteristic database, for performing signal analysis on the set of real-time current waveforms to produce a current state characteristic, and comparing the current state characteristic with the abnormal state characteristics pre-stored in the state characteristic database to determine the abnormal state of the rotating electrical machine.

Leisure vehicle

The present invention is to provide a leisure vehicle in which a load applied to an engine is controlled and a driving property and an output are improved. The leisure vehicle has a generator 30 to be driven by the engine for generating power, and a power generation control device 42 for controlling the generator 30 , wherein the power generation control device 42 increases or decreases a power generation amount of the generator 30 under a predetermined condition regarding the power generation amount of the generator 30 to be increased or decreased in accordance with an increase or a decrease in engine speed.

System and method for converter switching frequency control

A system for power conversion includes a power converter having switching elements, a detector, and a controller is provided. The detector detects a parameter and provides electrical signals indicative of the parameter. The controller receives the electrical signals transmitted from the detector, and sends commands to instruct the power converter to perform power conversion by operating the switching elements in accordance with switching signals at a different frequency in response to a detection of the system condition. A method for operating the system is also provided.

METHOD OF CONTROLLING THE REGULATION OF A MOTOR VEHICLE ALTERNATOR, AND CORRESPONDING DEVICES

A method comprises the transmission to a regulator () of the alternator of width-modulated pulses (PWM) exhibiting a duty ratio representative of a setpoint value (Vref) continuously included between a first reference duty ratio (DC) and a second reference duty ratio (DC), and the detection of these pulses by the regulator so as to generate the setpoint value. The method also comprises the transmission to the regulator of other width-modulated pulses (PWM) exhibiting a specific duty ratio (EXOF_R) which is less than the first reference duty ratio (DC)and ties between a low duty ratio (DCL) and a high duty ratio (DCH), and the detection of these other pulses by the regulator, in a first step, and the generation of an opening signal (EXOF) for a circuit for excitation of the alternator, in a second step, following this latter detection. 1813171. A method of controlling a regulating device () of a motor vehicle alternator () locking a DC voltage (B+ , B−) of an on-board electrical system () powered by said alternator () to a predetermined setpoint value (Vref) by controlling an excitation circuit () , said method in a first nominal operating mode of said alternator () , comprising the steps of:{'b': 8', '1', '1', '2, 'transmitting to said regulating device () by means of a communication line (COM) first width-modulated pulses having a predetermined period and a reference duty ratio (PWM) representative of said setpoint value (Vref) continuously comprised between a first reference duty ratio (DC) and a second reference duty ratio (DC); and'}{'b': '8', 'claim-text': {'b': '1', 'in a second operating mode of said alternator () without power generation, comprising the steps of, 'detecting said first pulses by said regulating device () and generating said setpoint value (Vref); and'}{'b': 8', '1, 'transmitting to said regulating device () second width-modulated pulses having said predetermined period and a specific duty ratio (EXOF_R) less than the first reference duty ...

Power oscillation damping controller

A power oscillation damping controller is provided for a power generation device such as a wind turbine device. The power oscillation damping controller receives an oscillation indicating signal indicative of a power oscillation in an electricity network and provides an oscillation damping control signal in response to the oscillation indicating signal, by processing the oscillation damping control signal in a signal processing chain. The signal processing chain includes a filter configured for passing only signals within a predetermined frequency range.

POWER PLANT UNIT

The invention relates to a power plant unit () for generating electrical power, comprising at least a first electric generator () which can be driven by a gas turbine (), at least a second electric generator () which can be driven by a reciprocating piston engine (). According to the invention, the at least one first and the at least second electric generator () feed electrical power into a common network (), wherein a section switch () is provided by which the common network () can be electrically connected to an electrical consumer (). 2. The power plant unit according to claim 1 , wherein the gas turbine is designed for an output range of from approximately 30 MW to approximately 70 MW.3. The power plant unit according to claim 1 , wherein the output of the reciprocating piston engine is approx. 15% to approx. 25% of the output of the gas turbine.4. The power plant unit according to claim 1 , wherein a common air intake device is provided for gas turbine and reciprocating piston engine.5. The power plant unit according to claim 1 , wherein a common exhaust silencer and common exhaust stack is or are provided for gas turbine and reciprocating piston engine.6. The power plant unit according to claim 1 , wherein the power plant unit is configured to feed waste heat of gas turbine and reciprocating piston engine to a common heat exchanger.7. The power plant unit according t claim 1 , wherein a common exhaust treatment device is provided for gas turbine and reciprocating piston engine.8. The power plant unit according to claim 1 , wherein the reciprocating piston engine has at least one charge-air inlet for precompressed charge air and the gas turbine has at least one compression stage claim 1 , wherein the at least one charge-air inlet of the reciprocating piston engine is connected to an exit of the at least one compression stage via a charge-air line.9. A power plant having at least two power plant units according to .101. A method of operating a power plant unit ...

FAULT TOLERANT ELECTRIC DRIVE SYSTEM

A fault tolerant electric drive system comprises an alternator, a motor controller and an electric motor, wherein the alternator and motor each have a plurality of corresponding independent phase windings, the motor controller having a plurality of independent phase drives corresponding to the phase windings, and a plurality of independent electric drive phases is defined by connecting each corresponding phase winding of the alternator and motor to a corresponding phase drive of the motor controller. 1. A fault tolerant electric drive system comprising an alternator , a motor controller and an electric motor , wherein the alternator and motor each have a plurality of corresponding independent phase windings , the motor controller having a plurality of independent phase drives corresponding to the phase windings , and a plurality of independent electric drive phases is defined by connecting each corresponding phase winding of the alternator and motor to a corresponding phase drive of the motor controller.2. The system according to claim 1 , wherein the motor mechanically drives the main fuel pump of a gas turbine engine.3. The system according to claim 1 , and comprising at least four electric drive phases.4. The system according to claim 1 , wherein each motor controller phase drive comprises a phase controller and a power bridge claim 1 , the power bridge being adapted to receive a first AC current from the alternator phase winding claim 1 , and to output a second AC current to the motor phase winding claim 1 , the phase controller being arranged to control the power bridge output of the second AC current in response to a command input thereto.5. The system according to claim 4 , wherein the command input to each phase controller is from a common multiplexed serial bus.6. The system according to claim 5 , wherein the command input to each phase controller is from a common dual redundant multiplexed serial bus.7. The system according to claim 4 , wherein the phase ...

Control and diagnostics of multiple electrical generating machines using an external voltage regulator

An electrical system for an automotive vehicle has a plurality of electrical generating machines having field windings energized by pulse width modulated drive signals generated by an external electronic voltage regulator. The pulse width modulated drive signals have a duty cycle determined by the electronic voltage regulator. A controller selects one of electrical generating machines to evaluate for failure and evaluates that electrical generating machine for failure by causing the PWM drive signal for the field windings of that electrical generating machine to be disabled. The controller then determines that this electrical generating machine has failed if the duty cycle for the PWM drive signals has then not been increased by the electronic voltage regulator by a pre-determined amount. The electrical generating machines are either generators or alternators. In an aspect, the PWM drive signals for the plurality of electrical generating machines are out of phase with each other.

METHOD AND ARRANGEMENT FOR OPERATING A WIND TURBINE CONVERTER

A method of operating a converter of a wind turbine for providing electric energy to a utility grid includes determining a grid voltage. If the grid voltage is between a nominal voltage and a first voltage threshold, i.e. higher than the nominal voltage, a normal procedure for lowering the grid voltage is performed. If the grid voltage is above the first voltage threshold, another procedure for keeping the wind turbine connected is performed, wherein the other procedure is different from the normal procedure. Further a corresponding arrangement is described. 1. Method of operating a converter of a wind turbine for providing electric energy to a utility grid , the method comprising:determining a grid voltage;performing a first procedure including lowering the grid voltage if the grid voltage is between a nominal voltage and a first voltage threshold;performing a second procedure if the grid voltage is above the first voltage threshold, wherein the second procedure includes keeping a DC voltage of a converter in a specific range,wherein the first and second procedure are different.2. The method according to claim 1 , wherein the second procedure comprises enabling a chopper claim 1 , wherein enabling the chopper comprises switching a first controllable switch to a conducting state for dissipating electric energy claim 1 , wherein the first controllable switch is connected between two DC nodes of a DC-link of the converter.3. The method according to claim 2 , wherein between the two DC nodes a resistor and the first controllable switch are connected in series.4. The method according to claim 1 , wherein the second procedure comprises claim 1 , after enabling the chopper claim 1 , disabling a pulse width modulation claim 1 , wherein disabling the pulse width modulation comprises:switching a second controllable switch of a grid side converter portion to a non-conducting state,dissipating electric energy by current flow through a diode,wherein the second controllable ...

POWER TRANSMISSION SYSTEMS

A power transmission system may include a plurality of renewable-energy devices such as wind turbines or subsea turbines. The devices are connected together in parallel to a subsea cable that carries an ac transmission voltage. Each device includes a turbine assembly that is rotated by wind or water current flows, and a variable speed ac induction generator. A power converter is connected to the subsea cable and is used to interface the generators to a supply network or power grid. The power transmission system is operated such that an indicated operating speed of one or more of the devices is used to control the power converter (e.g. the PWM strategy that is used to open and close the power semiconductor devices) to achieve desired stator electrical quantities at each generator. 1. A power transmission system comprising:a plurality of renewable-energy turbines connected in parallel to a power converter, each renewable-energy turbine including a turbine assembly and an induction generator; anda controller for the power converter; (i) an indication of the operating speed of one or more of the renewable-energy turbines, and/or', '(ii) an indication of the speed of the fluid flows acting on the turbine assemblies., 'wherein the controller usesto control the power converter to achieve desired stator electrical quantities at each induction generator to keep the renewable-energy turbines operating substantially at their maximum efficiency.2. The power transmission system of claim 1 , wherein the induction generators are connected to the power converter by means of a single transmission cable.3. The power transmission system of claim 1 , wherein the power converter includes a first active rectifier/inverter having a plurality of semiconductor power switching devices claim 1 , a second active rectifier/inverter having a plurality of semiconductor power switching devices claim 1 , and a dc link connected between the first active rectifier/inverter and the second active ...

WIND-TURBINE-GENERATOR CONTROL SYSTEM, WIND TURBINE GENERATOR, WIND FARM, AND WIND-TURBINE-GENERATOR CONTROL METHOD

In a wind turbine generator, the rotation of the rotor is speeded up by a hydraulic pump and a hydraulic motor and is transferred to a synchronous generator. In a state in which the wind turbine generator is interconnected to a utility grid, and the synchronous generator reaches a synchronous speed, if no mechanical power is transferred to the synchronous generator, a wind-turbine control system operates the synchronous generator as a synchronous condenser, thus controlling the magnitude of the field current of the synchronous generator. Thus, the wind turbine generator can supply reactive power to the utility grid without adding new equipment, such as a reactive power compensator using a semiconductor switch. 1. A wind-turbine-generator control system for a wind turbine generator that generates power with a synchronous generator through rotation of a rotor having blades , comprising a generator control unit for operating the synchronous generator as a synchronous condenser in a state in which the wind turbine generator is interconnected to a utility grid , and the synchronous generator reaches a synchronous speed , if mechanical power transferred to the synchronous generator is equal to or lower than a predetermined value , thus controlling a magnitude of field current of the synchronous generator.2. A wind-turbine-generator control system according to claim 1 , wherein the wind turbine generator is provided with a hydraulic pump that pumps hydraulic oil by rotation of the rotor; a hydraulic motor that is rotated with the hydraulic oil pumped out from the hydraulic pump claim 1 , thus rotationally driving the synchronous generator at a rotational speed that is equal to or higher than a rotational speed of the rotor; and an accumulator that is provided in a high-pressure pipe for delivering the hydraulic oil from the hydraulic pump to the hydraulic motor and that accumulates the hydraulic oil flowing from or to the hydraulic pump and the hydraulic motor claim 1 ,the ...

SELF-TUNING ENERGY HARVESTER

An apparatus for generating electricity includes a flexural member configured to flex upon being subject to a vibration. A plurality of weight displacement systems is disposed at the flexural member, each weight displacement system in the plurality being configured to displace a moveable weight upon receipt of a signal. A processor is configured to provide a signal to each weight displacement system in order to achieve a desired resonant frequency of the flexural member. And, an electricity generating device is coupled to the flexural member and configured to generate the electricity upon flexing of the flexural member. 1. An apparatus for generating electricity , the apparatus comprising:a flexural member configured to flex upon being subject to a vibration;a plurality of weight displacement systems disposed at the flexural member, each weight displacement system in the plurality being configured to displace a moveable weight upon receipt of a signal;a processor configured to provide a signal to each weight displacement system in order to achieve a desired resonant frequency of the flexural member; andan electricity generating device coupled to the flexural member and configured to generate the electricity upon flexing of the flexural member.2. The apparatus according to claim 1 , wherein the flexural member and the plurality of weight displacement systems are built as a micro-electro-mechanical-system (MEMS).3. The apparatus according to claim 1 , wherein each weight displacement system comprises:a moveable weight configured to move in a direction that changes the resonant frequency of the flexural member; andan actuating cell configured to move the moveable weight upon receipt of the signal from the processor.4. The apparatus according to claim 3 , wherein the actuating cell is configured to move the moveable weight through electrostatic attraction or repulsion.5. The apparatus according to claim 3 , further comprising a shaft coupled to the moveable weight ...

METHOD FOR OPERATING A WIND FARM, WIND FARM CONTROLLER AND WIND FARM

The disclosure concerns a method for operating a wind farm, the wind farm includes a wind turbine, and an energy storage device, the wind farm being connected to an external grid, the method comprising determining a demanded active power, determining a demanded reactive power, determining power production of the wind turbine, and charging the energy storage device, when the power production is above the demanded active power, the demanded reactive power, or the vector sum of demanded active power and demanded reactive power. Furthermore, corresponding wind farm controllers, wind farms, program elements, and computer readable media are subject of the current disclosure. 1. A method for operating a wind farm , the wind farm comprising a wind turbine and an energy storage device , the wind farm being connected to an external grid , the method comprising:determining a demanded active power;determining a demanded reactive power;determining power production of the wind turbine; andcharging the energy storage device, when the power production is above the demanded active power, the demanded reactive power, or the vector sum of demanded active power and demanded reactive power.2. The method for operating a wind farm according to claim 1 , the method further comprising:discharging the energy storage device, when the power production is below the demanded active power, the demanded reactive power, or the vector sum of demanded active power and demanded reactive power.3. The method for operating a wind farm according to claim 1 , the method further comprising:reducing the power production, when the power production is above a rated power production of the wind turbine.4. The method for operating a wind farm according to claim 1 , the method further comprising:reducing the power production, when the power production is above the sum of a rated charging power of the energy storage device and either the demanded active power or the demanded reactive power or the vector sum of ...

POLYPHASIC MULTI-COIL GENERATOR

A polyphasic multi-coil generator includes a driveshaft, at least first and second rotors rigidly mounted on the driveshaft so as to simultaneously synchronously rotate with rotation of the driveshaft, and at least one stator sandwiched between the first and second rotors. The stator has an aperture through which the driveshaft is rotatably journalled. A stator array on the stator has an equally circumferentially spaced-apart array of electrically conductive coils mounted to the stator in a first angular orientation about the driveshaft. The rotors and the stator lie in substantially parallel planes. The first and second rotors have, respectively, first and second rotor arrays. 1. A method of operating a generator , said generator comprising:a driveshaft;a first rotor rotatable by said driveshaft, said first rotor having a first array of magnets mounted thereon;a first stator having a first plurality of electrically conductive coils mounted thereon, wherein rotation of said first rotor relative to said first stator induces a current in at least some of said electrically conductive coils;said method comprising controlling an output voltage of said generator by dynamically modifying an electrical connection between coils of said first plurality of electrically conductive coils.2. The method of wherein a series-parallel electrical connection between coils is modified to provide a substantially constant output voltage over a range of driveshaft rotation speeds.3. The method of wherein:when said first rotor is rotated by said driveshaft at a first rate of rotation, said first plurality of coils are connected in series to obtain an output voltage; andwhen said rate of rotation of said first rotor is increased to a second rate of rotation that is higher than said first rate of rotation, at least some of said plurality of coils are connected in parallel to maintain substantially the same output voltage.4. The method of wherein when said first rotor is rotated by said ...

PERMANENT MAGNET GENERATOR INDUCTANCE PROFILE IDENTIFICATION

Parameters of PM machines, especially for IPM machine, are known to vary by significant amounts. This affects the controllability of such machines, which may lead to reduced power loading capability and increased losses. The present invention relates to a method for PM machine inductance profile identification based on voltage mode stator flux observation which could be easily integrated to the generator start-up process in wind turbine application for both stator flux vector feedback control system and current vector feedback control system. 1. A method for determining an inductance of a PM machine during operation of said PM machine , the method comprising the steps of:a) operating a PM machine within a predetermined rotational speed window,b) ramping up a DC level of a first reference signal until a desired first current level has been reached,c) computing a DC level of a second reference signal,d) adding a first time dependent AC test signal on the DC level of both the first reference signal and the second reference signal,e) computing a first self-saturation induced inductance value in response to the applied first time dependent AC test signal, and storing said first self-saturation induced inductance value in suitable memory means,f) computing a first cross-saturation induced inductance value in response to the applied first time dependent test signal, and storing said first cross-saturation induced inductance value in the memory means,g) removing the first time dependent AC test signal,h) repeating steps b)-g) until the self-saturation induced inductance and the cross-saturation induced inductance have been calculated and stored for a predetermined number of first current levels, andi) removing the first time dependent AC test signal, and ramping down the DC level of the first reference signal to zero.2. A method according to claim 1 , further comprising the steps of:a) ramping up the DC level of the first and second reference signals until desired current ...

Wind Power Generator

In a wind power generator, a nacelle is located on an upper portion of a support rod, a rotor head having wind turbine blades fitted thereto is rotatably supported to a front end side of the nacelle, and a main shaft rotating integrally with the rotor head, a gear box coupled with the main shaft which rotates while the wind turbine blades receive a wind power, a power generator having a rotor driven by a shaft output of the gear box, a brush, and a slip ring, and a humidity management device controlling humidity inside of the power generator having the brush and the slip ring, are installed in an interior of the nacelle. 1. A wind power generator ,wherein a nacelle is located on an upper portion of a support rod, a rotor head having wind turbine blades fitted thereto is rotatably supported to a front end side of the nacelle, and a main shaft that rotates integrally with the rotor head, a gear box that is coupled with the main shaft which rotates while the wind turbine blades receive a wind power, a power generator having a rotor driven by a shaft output of the gear box, a brush, and a slip ring, and a humidity management device that controls humidity inside of the power generator having the brush and the slip ring, are installed in an interior of the nacelle.2. The wind power generator according to claim 1 ,wherein the humidity management device includesa humidity sensor that measures the humidity inside of the power generator having the brush and the slip ring;a humidifier that compares a humidity value inside of the power generator having the brush and the slip ring, which is measured by the humidity sensor, with an optimum humidity value inside of the power generator having the brush and the slip ring, which is set in advance, and humidifies the interior of the power generator when the compared humidity value is equal to or lower than the set value; anda dehumidifier that dehumidifies the interior of the power generator when the compared humidity value is, larger ...

OVER-RATING CONTROL IN WIND TURBINES AND WIND POWER PLANTS

Wind turbines of a wind power plant may be selectively over-rated by measuring the difference between the nominal and actual power plant outputs and deriving an over-rating request signal based on that difference which is sent to each turbine. The same value may be sent to each turbine. Alternatively, each turbine may be given its own over-rating amount based on an optimisation of the turbine. Over-rating may also be used when external economic factors such as energy costs are sufficiently high to out-weigh any potential harmful effect of over-rating. The fatigue lifetime of turbines and their critical components may also be taken into account when deciding whether and to what extent to implement an over-rating command. 1. A controller for a wind turbine power plant , the power plant comprising a plurality of wind turbines each having a rated power output , the controller comprising an over-rating calculation unit for calculating and sending to two or more of the turbines an over-rating request signal indicating an amount up to which the turbines are to over-rate their output above their rated output.2. A controller according to claim 1 , wherein the over-rating request signal is calculated by the controller from a difference signal formed from the rated output of the power plant less the measured output of the power plant.3. A controller according to claim 2 , comprising an integrator for integrating the difference signal and an amplifier for applying a gain to amplify the integrated difference signal claim 2 , the amplified integrated difference signal being provided to the controller to derive the over-rating request signal.4. A controller according to claim 3 , wherein the gain applied by the amplifier is inversely proportional to the ratio of change in over-rating set point to power plant output change claim 3 , the ratio being provided from the plurality of wind turbines.5. A controller according to claim 3 , wherein the gain of the amplifier is dependent on ...

Circuit and Method for De-Energizing a Field Coil

A circuit includes a first half bridge including a first controllable semiconductor switch and a first diode. The first controllable semiconductor switch is coupled between a first constant supply potential and a center tap of the first half bridge. The first diode is coupled between the center tap and a constant reference potential. A second half bridge includes a second diode and a second controllable semiconductor switch. The second diode is coupled between a second constant potential higher than the first potential and a center tap of the second half bridge. The second controllable semiconductor switch is coupled between the center tap and the constant reference potential. Driver circuitry controls the conducting state of the first and the second semiconductor switch thus controlling the current flow through a field connectable between the center taps.

REMOTE MONITORING OF A TRANSPORT REFRIGERATION SYSTEM

Systems and methods for remote monitoring of a transport refrigeration system are provided. In one embodiment, a transport refrigeration system (“TRS”) is provided that includes a transport refrigeration unit (“TRU”) and a generator set (“genset”). The TRU includes a refrigeration circuit and a TRS controller. The genset includes a power generator a genset controller, a TRU remote monitoring device configured to obtain TRU telemetry data and a genset remote monitoring device configured to obtain genset telemetry data. The TRS genset is configured to send the TRS telemetry data to an external server. 1. A remote monitoring system for a transport refrigeration system of a refrigerated transport unit comprising: a refrigeration circuit configured to cool an interior space of the refrigerated transport unit, and', 'a transport refrigeration system controller configured to control the refrigeration circuit and to obtain transport refrigeration unit telemetry data; and, 'a transport refrigeration unit that includes a power generator configured to generate power and provide said power to the transport refrigeration unit, and', 'a generator set controller configured to control the power generator;, 'the transport refrigeration system generator set includeswherein the transport refrigeration system generator set is configured to receive transport refrigeration unit telemetry data sent from the transport refrigeration system controller.2. The remote monitoring system of claim 1 , wherein the generator set controller is configured to communicate the transport refrigeration unit telemetry data to an external server.3. The remote monitoring system of claim 1 , wherein the transport refrigeration system controller is directly coupled to the transport refrigeration system generator set via a powerline communication link claim 1 , andthe transport refrigeration system controller is configured to send the transport refrigeration unit telemetry data to the transport refrigeration ...

METHOD AND SYSTEM FOR CONTROLLING A GENERATOR

A method for controlling a generator having a rotor with a plurality of magnets and a first stator winding and a second stator winding, electrically separate from the first stator winding is provided. The rotor rotates around a rotation axis perpendicular to a radial direction relative to the stator windings. The method includes allowing flow of a first electric current through the first stator winding, thereby generating a first radial force having a first magnitude and acting between the first stator winding and the rotor, and allowing flow of a second electric current through the second stator winding, thereby generating a second radial force having a second magnitude and acting between the second stator winding and the rotor, wherein the first magnitude is different from the second magnitude resulting in a net generator generated radial force generated by the first stator winding and the second stator winding at the rotor. 1. A method for controlling a generator , comprising:providing a rotor with a plurality of magnets and a first stator winding and a second stator winding, electrically separated from the first stator winding, the rotor being adapted to rotate, around a rotation axis perpendicular to a radial direction relative to the stator windings;allowing flow of a first electric current through the first stator winding, thereby generating a first radial force having a first magnitude and acting between the first stator winding and the rotor; andallowing flow of a second electric current through the second stator winding, thereby generating a second radial force having a second magnitude and acting between the second stator winding and the rotor,wherein the first magnitude is different from the second magnitude resulting in a net generator generated radial force generated by the first stator winding and the second stator winding acting at the rotor.2. The method according to claim 1 , wherein the first electric current is different from the second electric ...

STATOR ARRANGEMENT AND ELECTRICAL GENERATOR

A stator arrangement includes a stator extending in a circumferential direction and plural teeth alternating with plural slots arranged along the circumferential direction. A first wire is arranged in a first slot of the plural slots. A second wire is arranged in a second slot of the plural slots, wherein the second slot is circumferentially adjacent to the first slot. A first converter has an input terminal connected to the first wire and a second converter has an input terminal connected to the second wire. 1. Stator arrangement , comprising:a stator extending in a circumferential direction and having plural teeth alternating with plural slots arranged along the circumferential direction;a first wire arranged in a first slot of the plural slots;a second wire arranged in a second slot of the plural slots, wherein the second slot is circumferentially adjacent to the first slot;a first converter having an input terminal connected to the first wire; anda second converter having an input terminal connected to the second wire.2. The arrangement according to claim 1 ,wherein a tooth of the plural teeth is circumferentially between the first slot and the second slot,wherein the first wire is connected in a same orientation to the first converter as the second wire is connected to the second converter.3. The arrangement according to claim 1 ,wherein the first wire is arranged in the first slot in plural turns forming a first coil,wherein the second wire is arranged in the second slot in plural turns forming a second coil.4. The arrangement according to claim 1 , further comprising:another first wire arranged in another first slot, circumferentially adjacent to the second slot, connected to another input terminal of the first converter;another second wire arranged in another second slot, circumferentially adjacent to the other first slot, connected to another input terminal of the second converter.5. The arrangement according to claim 1 , further comprising:a further first ...

Systems and methods for rotor angle measurement in an electrical generator

Disclosed herein are systems and methods for rotor angle measurement in an electrical generator. According to one embodiment, an intelligent electronic device may comprise control logic configured to generate a reference signal and to generate a rotational position signal based upon an indicator of a rotational position of a rotor in an electrical generator. The control logic may further be configured to detect a relative shift between the reference signal and the rotational position signal and to determine the rotational position of the rotor based upon the relative shift. A power angle of the electrical generator may be calculated based upon the rotational position of the rotor. According to certain embodiments, the control logic may further be configured to generate a control instruction to reduce the power angle in response to determining that the power angle exceeds a threshold.

ELECTRIC POWER SUPPLY SYSTEM

An electric power supply system includes: an AC generator having a drooping characteristic; a rectification section for converting AC output of the AC generator to DC; a load having an electric storage device supplied with power from the AC generator; and a control section provided between the rectification section and the load. The control section controls the AC generator so that the AC generator operates at predetermined voltage lower than output voltage corresponding to the maximum power operation point of the AC generator. 1. An electric power supply system comprising:an AC generator having a drooping characteristic;a rectification section for converting AC output of the AC generator to DC;a load having an electric storage device supplied with power from the AC generator; anda control section provided between the rectification section and the load, whereinthe control section controls the AC generator so that the AC generator operates at predetermined voltage lower than output voltage corresponding to the maximum power operation point of the AC generator, andthe control section controls the output voltage of the AC generator so that the output voltage starts from a predetermined voltage equal to or smaller than a rated input voltage of the control section, and then converges to a constant voltage as time elapses.2. The electric power supply system according to claim 1 , wherein the control section performs the control so that the output voltage of the AC generator starts from voltage of the load claim 1 , the output voltage and output power of the AC generator increase as time elapses claim 1 , and then the output voltage converges to constant voltage.3. The electric power supply system according to claim 1 , wherein the control section controls the output voltage of the AC generator so that the output voltage starts from 0V claim 1 , the output voltage and output power of the AC generator increase as time elapses claim 1 , and then the output voltage converges ...

VEHICLE-POWER-GENERATOR CONTROL APPARATUS AND CONTROL METHOD THEREOF

There is provided a vehicle-power-generator control apparatus and the control method thereof that does not notify a passenger of any erroneous alarm indicating an abnormality in an electric power generator, even when a power-generation stop command is received. it is determined that a vehicle power generator is not rotating, when the rotation speed, of the vehicle power generator, that is detected based on a power-generation voltage generated across an armature winding of the vehicle power generator is the same as or lower than a predetermined value; there is generated a power-generation stop holding signal obtained by delaying by a predetermined time a time point at which a power-generation stop signal, generated when the decoded command signal is a power-generation stop command signal for stopping electric-power generation, stops; then, the non-rotation determination signal is masked and invalidated, based on the power-generation stop holding signal. 1. A vehicle-power-generator control apparatus that controls a vehicle power generator mounted in a vehicle , based on a command from a controller provided in the vehicle , the vehicle-power-generator control apparatus comprising:a receiver that receives a command signal obtained by encoding a command from the controller;a decoder that decodes the command signal received by the receiver and then outputs a control voltage based on the command from the controller;a first comparator that compares the control voltage with an output voltage based on a power-generation voltage that is generated across an armature winding by the vehicle power generator;a magnetic-field driver that controls the power-generation voltage by controlling a magnetic-field current flowing in a magnetic-field winding of the vehicle power generator, based on an output signal of the first comparator;a rotation speed detector that detects a rotation speed of the vehicle power generator, based on a power-generation voltage generated across the armature ...

ACTIVE VIBRATION DAMPING USING ALTERNATOR

A method of performing active vibration damping in a front end accessory drive (FEAD) system of an automobile using an alternator of the FEAD system and an alternator are described. The method includes determining a resonance to be counteracted, determining a counteracting forcing function to counteract the resonance, and determining a duty cycle change to apply to a field voltage to obtain an output voltage with the counteracting forcing function, wherein the field voltage results in a field current supplied to a rotor that causes a stator to generate the output voltage. The method also includes implementing the duty cycle change for a period of time. 1. A method of performing active vibration damping in a front end accessory drive (FEAD) system of an automobile using an alternator of the FEAD system , the method comprising:determining a resonance to be counteracted;determining a counteracting forcing function to counteract the resonance;determining a duty cycle change to apply to a field voltage to obtain an output voltage with the counteracting forcing function, wherein the field voltage results in a field current supplied to a rotor that causes a stator to generate the output voltage; andimplementing the duty cycle change for a period of time.2. The method according to claim 1 , wherein the implementing for the period of time is on the order of milliseconds.3. The method according to claim 1 , further comprising repeating each of the determining the resonance claim 1 , the determining the counteracting forcing function claim 1 , the determining the duty cycle change claim 1 , and the implementing periodically.4. The method according to claim 1 , further comprising obtaining information to perform the determining the resonance.5. The method according to claim 4 , wherein the obtaining the information includes obtaining rotor speed claim 4 , rotor shaft acceleration claim 4 , displacement claim 4 , and a measure of actual resonance on the output voltage.6. The ...

POWER GENERATOR

A power generator includes: an output information acquisition unit which acquires output information including power-generating component capacity information indicative of a capacity of a power-generating component and output frequency information indicative of an output frequency of the power generator; an ammeter which measures a current flowing through a distribution path; a breaker provided in the distribution path; and a controller. The controller calculates an allowable current based on the output information, and controls the breaker to interrupt the distribution path when a current measured by the ammeter exceeds the allowable current. 1. A power generator outputting electric power generated by a power-generating component , the power generator comprising:an output information acquisition unit which acquires output information including power-generating component capacity information indicative of a capacity of the power-generating component and output frequency information indicative of an output frequency of the power generator;an ammeter which measures a current flowing through a distribution path;a breaker provided in the distribution path; anda controller which calculates an allowable current that is allowed to flow through the distribution path based on the output information, and controls the breaker to interrupt the distribution path when a measured current measured by the ammeter exceeds the allowable current.2. The power generator of claim 1 , whereinthe output information acquisition unit further comprises a frequency measurement unit which acquires the output frequency information through measurement, andthe controller calculates the allowable current of the power generator based on output information including the power-generating component capacity information and the output frequency information obtained through the measurement.3. The power generator of claim 1 , whereinthe output information acquisition unit further comprises a voltage ...

LINEAR POWER SUPPLY PRE-REGULATOR FOR ELECTRICAL CLIMATE COMPRESSORS

Inverter for an electric compressor comprising an auxiliary voltage supply that supplies a control electronics of the inverter with a DC voltage. The auxiliary voltage supply comprises a series circuit of a linear voltage regulator and a linear pre-regulator. The linear pre-regulator comprises a transistor and is connected to the input terminal of the linear voltage regulator. The linear pre-regulator and/or the linear voltage regulator are advantageously actively cooled by a refrigerant utilized in the electric compressor. 1. An inverter for an electric compressor , whereinthe inverter comprises an auxiliary voltage supply which supplies a control electronics of the inverter with DC voltage,{'b': '20', 'the auxiliary voltage supply comprises a series circuit of a linear voltage regulator () and a linear pre-regulator, and'}the linear pre-regulator comprises a transistor and is connected to the input terminal of the linear voltage regulator.2. An inverter according to claim 1 , wherein the linear pre-regulator the linear voltage regulator are actively cooled by a refrigerant utilized in the electric compressor.3. An inverter according to claim 1 , wherein the linear pre-regulator comprises furthermore a regulation unit which operates the transistor in the linear range such that the transistor generates a voltage drop from the input voltage of the auxiliary voltage supply to a predetermined output voltage.4. An inverter according to claim 1 , wherein the transistor in the switched on state is as low ohmic as feasible.5. An inverter according to claim 1 , wherein the auxiliary voltage supply comprises furthermore a control unit which monitors the input voltage of the auxiliary voltage supply and switches off the transistor if the input voltage exceeds a threshold value.6. An claim 1 , inverter according to claim 1 , wherein the auxiliary voltage supply comprises furthermore a control unit which switches off the transistor in response to a shutdown signal.7. An ...

TOPOLOGY OF CONVERTER POWER SUPPLIES IN ELECTRICAL CLIMATE COMPRESSORS

The invention relates to an electric compressor control device comprising a low-voltage domain. The low-voltage domain comprises a first control unit set up to process control commands for the control of the electric compressor, and a first voltage supply set up to supply the first control unit and connected to a low-voltage source. The low-voltage domain comprises furthermore a high-voltage domain. The high-voltage domain comprises a second control unit set up to control a power output stage, wherein the power output state inverts a dc voltage from a high-voltage source into an ac voltage in order to supply a motor of the electric compressor with the ac voltage. The high-voltage domain comprises furthermore a second voltage supply set up to supply the second control unit and connected to the high-voltage source. 1. A control device for an electric compressor , wherein the control device comprises: a first control unit set up to process control commands for controlling the electric compressor and', 'a first voltage supply set up to supply the first control unit and connected to a low-voltage source; and, 'a low-voltage domain that comprises a second control unit set up to control a power output stage, wherein the power output stage inverts a dc voltage from a high-voltage source into an ac voltage in order to supply a motor of the electric compressor with the ac voltage, and', 'a second voltage supply set up to supply the second control unit and connected to the high-voltage source., 'a high-voltage domain that comprises2. A control device as in claim 1 , wherein the high-voltage domain comprises furthermore a start-up unit set up to start up the second voltage supply during a switch-on process of the control device.3. A control device as in claim 2 , wherein the second voltage supply comprises a switching regulator and the start-up unit limits a voltage rise at the switching regulator during the switch-on process.4. A control device according to claim 1 , wherein ...

RAPIDLY AVAILABLE ELECTRIC POWER FROM A TURBINE-GENERATOR SYSTEM HAVING AN AUXILIARY POWER SOURCE

Turbine-generator systems having an auxiliary power source and methods of operating turbine-generator systems having auxiliary power sources in a high, intermittent load environment are provided. The turbine may be sized to meet substantially all the power required by the intermittent load. The auxiliary power source may have a power rating approximately equal to the power required to rotate the unloaded generator at an operational speed. The method may include decoupling the turbine from the generator, removing the load from the generator, coupling the auxiliary power source to the unloaded generator, and maintaining the operational rotational speed of the generator with the auxiliary power source. 1. In a high intermittent load environment , wherein a gas turbine drives a generator to provide power to an intermittent load and the gas turbine is sized to meet substantially all the power required by the intermittent load , a method of maintaining an operational rotational speed of the generator in a standby mode , comprising:decoupling the gas turbine from the generator;removing the load from the generator;coupling an auxiliary power source to the unloaded generator; andmaintaining the operational rotational speed of the generator with the auxiliary power source, wherein the auxiliary power source has a continuous maximum power rating approximately equal to power required to rotate the unloaded generator at the operational rotational speed.2. The method of claim 1 , wherein the auxiliary power source is an electric power source.3. The method of claim 2 , further comprising:supplying electrical power from the electric power source to the generator; andoperating the generator as a motor.4. The method of claim 2 , further comprising:supplying electrical power from the electric power source to a secondary motor; androtating the unloaded generator with the secondary motor.5. The method of claim 2 , wherein the electric power source is selected from the group consisting ...

BIOMECHANICAL ELECTRIC GENERATOR

The present invention is able to extract significant amounts of energy from a user who is walking or running while remaining discreetly hidden near an area of the body where many people already carry things (e.g. wallet, smartphone, keys). The user benefits by keeping their device(s) charged for a longer period of time without the need for external batteries. In addition, the present invention encourages an active lifestyle, which has been shown to promote good health and reduce the risk of many diseases. 1. (canceled)2. (canceled)3. A biomechanical electric generator , comprising:a conversion unit which is removably attached to a first upper leg of the user; anda transmission component which is removably attached to a second upper leg of the user at a first end and a second end of the transmission component is coupled to the conversion unit, the transmission component transmits relative motion between the first and second leg during locomotion to the conversion unit;wherein the conversion unit converts the motion of the transmission component into electrical power.4. The biomechanical electric generator of claim 3 , wherein the transmission component further comprising a flexible shaft which transmits the rotational motion of the first upper leg of the user relative to the second upper leg of the user to the conversion unit.5. The biomechanical electric generator of claim 3 , wherein the transmission component further comprises a flexible tension member which is routed around the first upper leg of the user and the second upper leg of the user in a figure eight path claim 3 , the flexible tension member is removably attached to a portion of the second upper leg of the user at the first end and coupled to the conversion unit at the second end wherein a first portion of the flexible tension member claim 3 , which is routed behind the first upper leg of the user and in front of the second upper leg of the user claim 3 , is drawn out of the conversion unit when the ...

FAULT-TOLERANT ELECTRICAL DRIVE

Fault-tolerant electrical drive systems and methods of maintaining electrical balance or continuing operation of a rotary electric machine under a fault condition are provided. One such system comprises: a rotary electric machine comprising pn phases having a common connection point, where p is a prime number and n is an integer greater than or equal to 1; a drive circuit module having pn phase drive circuits and a reserve drive circuit; and a contactor module. The contactor module comprises: pn phase contactors each of which is operable to connect one of the pn phases of the rotary electric machine to a respective one of the pn phase drive circuits; and a phase fault contactor operable to connect the reserve drive circuit to the common connection point. 1. A fault-tolerant electric drive system comprising:a rotary electric machine comprising pn phases having a common connection point, where p is a prime number and n is an integer greater than or equal to 1;a drive circuit module having pn phase drive circuits and a reserve drive circuit; anda contactor module comprising:pn phase contactors each of which is operable to connect one of the pn phases of the rotary electric machine to a respective one of the pn phase drive circuits; anda phase fault contactor operable to connect the reserve drive circuit to the common connection point,the contactor module being configured in a normal operational mode to close each of the pn phase contactors to connect each of the pn phases to a respective one of the pn phase drive circuits,wherein, in a phase fault mode, in response to a fault in one of the pn phases, hereinafter the faulted phase, the contactor module is configured to open one of the pn phase contactors between the faulted phase and a respective one of the phase drive circuits and to close the phase fault contactor to allow continued operation of the electric drive system.2. The fault-tolerant electric drive system of wherein the contactor module comprises pn drive ...

Generator System and Method of Operation

A generator system includes an AC generator having one or more phases; a transformer having the same number of phase as the generator; for each phase of the AC generator, a capacitive element having a first terminal electrically connected to an output winding of the AC generator and a second terminal electrically connected to a primary winding of a respective phase of the transformer; a prime mover in driving engagement with the AC generator; and a load connected to a secondary winding of the transformer. A method to reduce the mechanical input to the AC generator includes reducing the counter torque of the generator system via a respective series connected capacitive element having a first terminal electrically connected to the output winding of the AC generator and a second terminal electrically connected to a primary winding of a respective phase of the transformer.

MONITORING A MULTI-WINDING SET STATOR

A method of monitoring a first winding set and at least one second winding set of a stator of a generator during operation is provided. The method includes: obtaining a first strength of a second harmonic of a first power produced from the first winding set; obtaining a second strength of a second harmonic of a second power produced from the second winding set; diagnosing the first winding set and/or the second winding set based on a second harmonic power difference between the first strength and the second strength. 1. A method of monitoring a first winding set and at least one second winding set of a stator of a generator during operation , the method comprising:obtaining a first strength of a second harmonic of a first power produced from the first winding set;obtaining a second strength of a second harmonic of a second power produced from the at least one second winding set; anddiagnosing the first winding set and/or the at least one second winding set based on a second harmonic power difference between the first strength and the second strength.2. The method according to further comprising:obtaining a first power time average of the first power;obtaining a second power time average of the second power;wherein the diagnosing involves forming a power difference ratio proportional to a ratio between the second harmonic power difference and a sum of the first power time average and the second power time average.3. The method according to claim 1 , wherein diagnosing involves comparing a term derived from the power difference ratio diminished by a difference threshold claim 1 , wherein one of the first or the second winding set is diagnosed as faulty claim 1 , if the absolute of the term is larger than the difference threshold.4. The method according to claim 1 , wherein the term is formed as the power difference ratio diminished by an offset being related to an expected difference of power output between the first winding set and the second winding set claim 1 , ...

METHOD AND APPARATUS FOR MONITORING THE OPERATION OF A POWER GENERATING INSTALLATION

A method for monitoring operation of a power generating installation that has at least one generator that is driven by a rotating machine, in which values of an operating parameter of the generator and/or rotating machine are captured and stored, it is ascertained whether the value of the operating parameter at prescribed checking times lies outside an admissible range, wherein a possible fault is inferred if the value of the operating parameter lies outside the admissible range at two directly successive checking times, an additional check is performed to determine whether the value of the operating parameter is approaching the admissible range in a prescribed checking interval that lies between two directly successive checking times and particularly extends as far as the later of the two checking times, and it is inferred that there is a fault if the value of the operating parameter is not approaching the admissible range. 1. A method for monitoring the operation of an electricity generating installation , which comprises at least one generator that is driven by a rotating machine in order to supply electricity to an electric grid , the method comprising:acquiring and storing values of an operating parameter of the generator and/or of the rotating machine,ascertaining whether the value of the operating parameter at prescribed checking instants lies outside an admissible rangeinferring a possible fault if the value of the operating parameter lies outside the admissible range at two directly successive checking instants, and additionally checking whether the value of the operating parameter is approaching the admissible range in a prescribed checking interval that lies between the two directly successive checking instants and, in particular, extends up to the later of the two checking instants, andinferring that there is a fault if the value of the operating parameter is not approaching the admissible range.2. The method as claimed in claim 1 ,wherein checking ...

Systems and methods for controlling torsional oscillation in wound field synchronous generator machines

A method for controlling torsional oscillation includes detecting angular position of a wound field synchronous generator machine, extracting information indicative of torsional oscillation, selecting synchronous torsional oscillations, compensating for the synchronous torsional oscillations with an exciter signal, and controlling field current in the wound field synchronous generator using the exciter signal. A damping controller includes a damping module with a synchronous selective compensator and a synchronous notch filter for generating torsional oscillation compensation signals for asynchronous torsional oscillation.

POWER GENERATION AND DISTRIBUTION SYSTEM FOR OFFSHORE DRILLING UNITS

The present invention relates to power generation and distribution system suitable for use in a variety of applications such as Mobile Offshore Drilling Units and fixed offshore installations including various types of seaborne vessels, drilling rigs etc. 1. A power generation and distribution system for a drilling rig comprising:an AC bus and a DC bus,an AC generator electrically connected to the AC bus,an AC bus load electrically connected to the AC bus,a first power transformer configured to convert a plurality of voltage phases of the AC bus into a plurality of corresponding secondary side voltage phases, a first unidirectional AC-DC power converter connected between the secondary side voltage phases of the first power transformer and the DC bus for supplying power to the DC bus,one or more DC bus loads connected to the DC bus,a second AC-DC power converter connected between the DC bus and at least one of an auxiliary transformer winding of the first power transformer and a second power transformer for supplying power from the DC bus to the AC bus.2. The power generation and distribution system according to claim 1 , wherein the first power transformer comprises:a plurality of primary side transformer windings and a plurality of secondary side transformer windings wound around a common magnetic core wherein the auxiliary transformer winding is wound around the common magnetic core to energize the plurality of primary side transformer windings.3. The power generation and distribution system according to claim 1 , further comprising a power management controller configured to:detect one or more parameters of the AC bus,selectively activate and deactivate each of the first AC-DC power converter and the second AC-DC power converter based on the one or more detected parameters of the AC bus.4. The power generation and distribution system according to claim 3 , wherein the power management controller is configured to: compare an AC voltage on the AC bus to the at ...

CARBON MONOXIDE SHUTOFF SYSTEM FOR ELECTRIC GENERATOR

A carbon monoxide shutoff system for an engine of a portable electrical generator has a carbon monoxide gas sensor, a microcontroller, and an output indicator. The carbon monoxide gas sensor generates an output electrical current proportional to a detected concentration of ambient carbon monoxide. The microcontroller has an input connected to the carbon monoxide gas sensor, and an output connected to an operational control of the engine. A deactivation signal generated by the microcontroller in response to detection of a deactivation condition is based upon the output electrical current from the carbon monoxide gas sensor matching predefined value and duration thresholds. The deactivation signal is operative to stop the engine. 1. A carbon monoxide shutoff system for an engine of a portable electrical generator , the system comprising:a carbon monoxide gas sensor generating an output electrical current proportional to a detected concentration of ambient carbon monoxide;a microcontroller with an input connected to the carbon monoxide gas sensor, and an output connected to an operational control of the engine, a deactivation signal generated by the microcontroller from the output thereof in response to detection of a deactivation condition based upon the output electrical current from the carbon monoxide gas sensor matching predefined value and duration thresholds, the deactivation signal being operative to stop the engine; andan output indicator connected to the microcontroller, a deactivation notification sequence being generated on the output indicator in response to the detection of the deactivation condition.2. The carbon monoxide shutoff system of claim 1 , wherein the operational control of the engine is an ignition coil claim 1 , the deactivation signal being operative to cut an ignition electrical signal to the ignition coil.3. The carbon monoxide shutoff system of claim 2 , wherein the microcontroller and the carbon monoxide gas sensor are embedded within an ...

System and Method for Exciting Low-Impedance Machines Using a Current Source Converter

An energy conversion system includes a low-impedance generator having at least one armature winding set. The armature winding set includes a plurality of single-phase coils. The system also includes a current source converter assembly electrically coupled to an armature of the generator. The current source converter assembly includes at least one current source converter that includes a current source rectifier coupled to a current source inverter via a DC link and at least one capacitor across the plurality of single-phase armature coils. The capacitor(s) of the current source converter(s) is configured to absorb high frequency components of current pulses generated by the current source converter so as to minimize current ripple in a current applied to the plurality of single-phase coils.

APPARATUS AND METHODS FOR REDUCING GENERATOR FREQUENCY VARIATION

A system includes a generator configured to be electrically coupled to a grid, an engine configured to drive the generator, and a solid state generator coupled between the grid and an energy storage device. The system further includes a bias controller configured to detect a frequency of the grid and to responsively provide a bias signal to a speed controller of the engine. The bias controller may include a frequency bias controller configured to generate a frequency bias load sharing signal responsive to the detected frequency of the grid and a load sharing controller that receives the frequency bias load sharing signal and that generates the bias signal responsive to the load sharing signal. 1. A system comprising:a generator configured to be electrically coupled to a grid;an engine configured to drive the generator;a solid state generator (SSG) configured to couple an energy storage device to the grid; anda bias controller coupled to the SSG and configured to detect a frequency of the grid and to responsively provide a bias signal to a speed controller of the engine.2. The system of claim 1 , wherein the bias controller comprises:a frequency bias controller configured to generate a frequency bias load sharing signal responsive to the detected frequency of the grid; anda load sharing controller that receives the frequency bias load sharing signal and that generates the bias signal responsive to the load sharing signal.3. The system of claim 2 , wherein the frequency bias controller is configured to control a load sharing line that is used to provide a customer load sharing signal to the load sharing controller.4. The system of claim 2 , wherein the frequency bias controller is configured to generate the frequency bias load sharing signal responsive to the detected frequency claim 2 , a state of charge of the energy storage device and an active power output of the SSG.5. The system of claim 1 , wherein the bias controller is configured to provide the bias signal ...

PREDICTIVE POLE SLIP USING TIME SYNCHRONIZATION

Systems and apparatuses include an alternator including a stator and a rotor structured to be coupled to a crankshaft of a prime mover, and processing circuits structured to: determine a crankshaft position, associate a crankshaft timestamp with the crankshaft position, determine a stator voltage waveform position, associate a stator voltage waveform timestamp with the stator voltage waveform position, determine a common time base using the crankshaft timestamp and the stator voltage waveform timestamp, determine a rotor position based on the crankshaft position and associated with the common time base, determine a load angle based on the rotor position and the stator voltage waveform position using the common time base, compare the load angle to a stability limit, and transmit a predicted pole slip signal to at least one of the prime mover or the alternator to inhibit a pole slip event when the load angle exceeds the stability limit. 1. A system , comprising:an alternator including a stator and a rotor structured to be coupled to a crankshaft of a prime mover and rotatable within the stator; and determine a crankshaft position,', 'associate a crankshaft timestamp with the crankshaft position,', 'determine a stator voltage waveform position,', 'associate a stator voltage waveform timestamp with the stator voltage waveform position,', 'determine a common time base using the crankshaft timestamp and the stator voltage waveform timestamp,', 'determine a rotor position based on the crankshaft position and associated with the common time base,', 'determine a load angle based on the rotor position and the stator voltage waveform position using the common time base,', 'compare the load angle to a stability limit, and', 'transmit a predicted pole slip signal to at least one of the prime mover or the alternator to inhibit a pole slip event when the load angle exceeds the stability limit., 'one or more processing circuits comprising one or more memory devices coupled to one ...

Modified Halbach Array Generator

A generator is described that includes a modified elongated Halbach array of magnets and a second array of magnets that interact to provide a flux field, which in turn interacts with a coil to generate an electrical current. The modified Halbach array includes two sets of magnets that are interspersed. In a first set of magnets the individual magnetic units are arranged in groupings of at least two magnets that are adjacent to one another and have the same magnetic orientation. In the second set of magnets utilizes either individual magnetic units or small groupings of individual magnetic units (relative to the first set of magnets) that are arranged in a different magnetic orientation than the first set, but identical to one another. A controller modifies electrical communication between different coils and/or controls inverters associated with the coils in order to control and stabilize electrical output from the generator. 1. A generator , comprising:a first array of magnets disposed in a first magnet configuration comprising a first elongated Halbach configuration;a second array of magnets disposed in a second magnet configuration, wherein the second array of magnets is separated from the first array of magnets by an adjustable gap comprising a ring gap;an actuator coupled to at least one of the first array and the second array, wherein the actuator is configured to adjust the ring gap; anda coil disposed between the first array of magnets and the second array of magnets such that relative movement of the first array of magnets and the second array of magnets with respect to the coil generates an electric current.2. The generator of claim 1 , further comprising a first ring comprising the first array of magnets and a second ring comprising the second array of magnets.3. The generator of claim 2 , wherein at least one of the first ring and the second ring comprises at least one cooling hole positioned to provide cooling on air flow through the generator.4. The ...

POWER SYSTEM

A power system for delivering a custom level of electrical power to an industrial or commercial facility includes a local generator connected to a turbine operating in accordance with an organic Rankine or steam Rankine cycle. The local generator has a capacity at least greater than a maximum anticipated power level needed for the electrical needs of a local industrial or commercial facility. One or more control devices are operatively connected to the local generator for regulating active and reactive power generated by the generator. A controller directs the one or more control devices to regulate the generator such that the active power and reactive power generated by the generator are sufficient to satisfy active and reactive load conditions of local industrial or commercial facilities. Also, a flow control component is operatively connected to the main conduit for automatically limiting the flow of the motive fluid to the turbine module during base load conditions and for automatically increasing the flow of the motive fluid to the turbine module during variable load conditions. 1. A power system for delivering a custom level of electrical power to an industrial or commercial facility , comprising a local generator connected to a turbine operating in accordance with an organic Rankine or steam Rankine cycle , said local generator having a capacity at least greater than a maximum anticipated power level needed for the electrical needs of a local industrial or commercial facility , one or more control devices operatively connected to said local generator for regulating active and reactive power generated by said generator , a detector for sensing active voltage produced by said generator , a detector for sensing reactive voltage produced by said generator , and a controller in electrical communication with said one or more control devices and with said active and reactive voltage detectors , wherein said controller directs said one or more control devices to ...

Acyclic exciter for an alternator

A self-excited alternator for generating electrical energy. The alternator includes a stator, a rotor, and an exciter. The rotor includes conductors which are integrated within the rotor via one of a casting process, a welding process, or a fastening process. The exciter includes a magnet producing a static magnetic field, and a rotatable conductive member coupled to the shaft and electrically coupled to the one or more conductors. The rotatable conductive member is operable to output the direct current to the one or more conductors upon rotation within the static magnetic field, thus exciting the alternator.

SYSTEM AND METHOD FOR AN INTEGRATED CONTROL SYSTEM FOR A DIESEL GENERATING SET

An integrated control system and method which improves load application/rejection performance for diesel generating sets is disclosed. Feedback-linearizing control is used for voltage regulation, which removes interaction between automatic voltage regulation and speed regulation. A proper feed-forward signal is sent to the governor using load anticipation control. The integrated control reduces engine speed and voltage deviations. It is implemented in the voltage regulator, since it recognizes load changes before the engine. The integrated control helps the engine anticipate throttle adjustments in advance of load being recognized by the engine. Test results show an improvement in engine speed recovery after a large increase or decrease in load. 1. A method for controlling a diesel generating set including a diesel engine , a generator having a terminal voltage and a generator output voltage magnitude and frequency response , an exciter having an exciter field voltage , a speed governor having a generator speed reference and a first communications interface , and an automatic voltage regulator having a generator reference voltage and a second communications interface , the method comprising steps of:determining, by the automatic voltage regulator, a voltage feedback control output voltage based on the terminal voltage of the generator by a speed of the generator;controlling the exciter field voltage, by the automatic voltage regulator, by modifying the generator reference voltage by the voltage feedback control output voltage;measuring, by the automatic voltage regulator, a real power output of the generator;determining, by the automatic voltage regulator, a rate of change of the generator real power output;determining, by the automatic voltage regulator, a speed feedback control output based on rate of change of the generator real power output;transmitting, by the automatic voltage regulator, through the first communications interface, the speed feedback control ...

REGULATION METHOD

The invention relates to a method for automatic regulation of a system in which a plurality of parameters characteristic of the system are measured and in which at least one control parameter (u) is applied as a function of the measured parameters (y). The method includes choosing a nominal operating point of the system, and defining a nominal model (Mn) of the system at this nominal operating point. The method further includes determining a set of representative models ([Mk]) of the possible variations relative to the nominal model (Mn) and parameterizing the error of the nominal model (Mn) of the system by decomposition ([δ]d) over all the errors between the models of the set of models ([Mk]) representative of the possible variations and the nominal model (Mn). The method also includes minimizing a given optimization criterion (J) by varying at least one of the previously obtained parameters ([δ]) of the error (Δ) relative to the nominal model (M) of the system. The invention also relates to the regulation device configured for applying the method. 1. A method for automatic regulation of a system in which a plurality of parameters characteristic of the system are measured and in which at least one control parameter (u) is applied as a function of the measured parameters (y) , the method comprising:choosing a nominal operating point of the system;determining a nominal model (Mn) describing the system at this nominal operating point;determining a set of representative models ([Mk]) of the possible variations relative to the nominal model (Mn);{'sub': 'ik', 'parametering the error of the nominal model (Mn) of the system by decomposition ([δ]) over all the errors between the models of the set of models ([Mk]) representative of the possible variations and the nominal model (Mn);'}{'sub': 'ik', 'minimizing a given optimization criterion (J) by varying at least one of the previously obtained parameters ([δ]) of the error (Δ) relative to the nominal model (M) of the ...

Systems and Methods for Controlling Electrical Power Systems Connected to a Power Grid

The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm. 1. A method for controlling a power system connected to a power grid , the power system having a plurality of power subsystem clusters , each of the power subsystems including a generator and defining a stator power path and a converter power path for supplying power to the power grid , the converter power path having a partial power transformer and a rotor power path , the method comprising:receiving, by a controller, a reactive power instruction and a measured reactive power from the generator;generating a reactive power error signal by the controller based on a difference between the reactive power instruction and the measured reactive power;receiving the reactive power error signal by a reactive power regulator;generating a voltage instruction by the reactive power regulator based on the reactive power error signal;generating a voltage droop signal by a droop controller based on a reference reactance and a voltage at a point of common coupling;generating, by the controller, the voltage error signal according to at least one ...

GAS TURBINE ENGINE SYSTEM WITH ELECTRICAL POWER EXTRACTION

An engine system comprises first and second electrical generators coupled to lower and higher pressure (LP, HP) shafts respectively of a gas turbine engine. A controller is arranged to receive a signal corresponding to a total electrical power demand Pand to output control signals to the electrical generators in response thereto such that the first and second electrical generators output electrical powers (1−y)Pand yPrespectively when P≤P, where 0.5 Подробнее

METHOD FOR CONTROLLING A WIND TURBINE

A method is provided for controlling a wind turbine that has a generator that is controlled via a converter in a boost operation, in which an electrical power that is fed into an electrical transmission network is increased via a generative deceleration of the generator. The method comprises using a control to determining a set point value for a generator torque depending on an actual value of a rotational speed. The determined set point value for the generator torque is applied to a generator via a limiter with a predefinable upper and lower limit. Determining the set point value for the generator torque in boost operation that leads to an increased fed-in electrical power in response to a boost signal; and limiting a temporal change of the set point value for the generator torque in a recovery operation in response to a recovery signal. 1. A method for controlling a wind turbine that has a generator that is controlled via a converter in a boost operation , in which an electrical power that is fed into an electrical transmission network is increased by a generative deceleration of the generator , the method comprising:{'sub': 'meas', 'using a control to determine a set point value for a generator torque (N*) depending on an actual value of a rotational speed (n);'}{'sub': up', 'low, 'applying the determined set point value for the generator torque (N*) to a generator via a limiter with a predefinable upper and lower limit (N, N),'}{'sub': boost', 'inc', 'boost, 'determining the set point value for the generator torque (N*) in boost operation that leads to an increased fed-in electrical power (P) in response to a boost signal (flag); and'}{'sub': 'rec', 'limiting a temporal change of the set point value for the generator torque (dN*/dt) in a recovery operation in response to a recovery signal (flag).'}2. The method according to claim 1 , wherein a maximum permissible temporal change of the set point value for the generator torque (dN*/dt) is determined depending on ...

SYNCHRONOUS MACHINE WITH COMMON MOTOR/GENERATOR EXCITER STAGE

A synchronous machine () has a frame (), a shaft (), a main section (), and an exciter section (). The main section () has a stator winding () which is mounted on the frame, and a rotor winding () which is mounted on the shaft. The exciter section has a transformer () and a rectifier (). The transformer has a primary winding (A) mounted on the frame and a secondary winding (B) mounted on the shaft. The rectifier is mounted on the shaft and rectifies an output of the secondary winding to provide a rectified output to the rotor. A control unit () provides a high-frequency control signal to the primary winding. This signal is magnetically coupled to the secondary winding, rectified, and then applied to the rotor to control the operation of the synchronous machine. 1. A synchronous machine comprising:a frame;a shaft extending from at least one end of the frame and having a channel formed therein; a stationary winding mounted to the frame; and', 'a rotating winding, mounted on the shaft, and spaced apart from, and magnetically coupled to, the stationary winding; and', 'an exciter section, comprising:', 'a transformer having a primary winding and a secondary winding spaced apart from, and magnetically coupled to, each other, each winding being in the shape of a disk, the primary winding being mounted to the frame at an end of the shaft, the disk of the primary winding defining a first plane which is perpendicular to the shaft, the secondary winding being secured to the shaft near an end of the shaft, the disk of the secondary winding defining a second plane which is perpendicular to the shaft, the second plane being parallel to and spaced apart from the first plane, the shaft not penetrating the first plane;', 'a rectifier, mounted on the shaft, to rectify an output of the secondary winding and provide a rectified output to the rotating winding;', 'first conductors to electrically connect the rectified output of the rectifier to the rotating winding; and', 'second ...

Method for controlling a wind turbine

A method for controlling a wind turbine comprising inputting an actual value of rotational speed and a rotational speed setpoint into a control and outputting a set point value for a generator torque from the control. Inputting the set point value for the generator torque into a limiter with a predefinable upper and lower limit and outputting a limited torque value that is fed into a converter control. Increasing the actual value of the fed-in electrical power by an additional amount of power in response to a boost signal, wherein the fed-in electrical power and the additional amount of power are combined into an aggregated power setpoint value. Determining the set point value for the generator torque from the aggregated power setpoint value and applying the set point value for the generator torque in the boost operation to the limiter both as the upper limit and as the lower limit.

GENERATOR ROTOR TURN-TO-TURN FAULT DETECTION USING FRACTIONAL HARMONICS

Detection and protection against electric power generator rotor turn-to-turn faults, rotor multi-point-to-ground faults, and rotor permanent magnet faults is provided herein. A fractional harmonic signal is used to determine the rotor fault condition. The fractional harmonic signal may be a fractional harmonic magnitude of the circulating current of one phase. The fractional harmonic may be a fractional harmonic magnitude of a neutral voltage. A tripping subsystem may issue a trip command based upon detection of a rotor turn-to-turn fault condition. 1. A device for protecting an electric power generator for generating electrical energy for an electric power delivery system using a stator and a rotor , the device comprising;a sensor component in electrical communication with an instrument transformer of the generator, the sensor component including a current signal output for providing current signals corresponding with the instrument transformer of the generator;a processor; calculate a fractional harmonic of the signal output using the current signals;', 'compare the fractional harmonic to a predetermined threshold;', 'determine a rotor fault condition when the fractional harmonic exceeds the predetermined threshold for a predetermined time; and,', 'determine a protective action when the rotor fault condition is determined; and, an output in communication with the computer-readable storage medium for effecting the determined protective action., 'a computer-readable storage medium in communication with the processor and the sensor component, comprising instructions that when executed by the processor cause the device to2. The device of claim 1 , wherein the instrument transformer is associated with a parallel branch of a single phase of the electric power generator.3. The device of claim 1 , wherein the sensor component is in electrical communication with a plurality of instrument transformers of the generator claim 1 , the sensor current signal output for providing ...

EXTERNAL POWER SUPPLY SYSTEM

External power supply system includes an electrical storage device, motor, inverter that drives the motor by using electric power of the electrical storage device, and a control device controls the inverter. The inverter includes a first and second switching elements connected in series with each other between a positive and negative electrode power supply lines. A connection-node of the first and second switching elements is connected to one corresponding stator coil. The control device inputs signals to the inverter to drive the inverter such that voltage at the neutral point becomes a predetermined value. The control device compensates for signals in dead time period, the period in which off-state signals are supplied to the first and second switching elements, on the basis of current that is input from the connection-node to one corresponding stator coil or output from one corresponding stator coil to the connection-node while an engine is driven. 1. An external power supply system comprising:an electrical storage device;a motor including stator coils connected to a neutral point, the neutral point being an output node from which electric power from the electrical storage device is supplied to an external device;an inverter configured to drive the motor by using the electric power of the electrical storage device, the inverter including a first switching element and a second switching element connected in series with each other between a positive electrode power supply line and a negative electrode power supply line, a connection node of the first switching element and the second switching element being connected to a corresponding one of the stator coils; anda control unit configured to control the inverter, the control unit being configured to input driving signals to the inverter so as to drive the inverter such that a voltage at the neutral point becomes a predetermined value, the control unit being configured to compensate for the driving signals in a dead ...

METHOD FOR CONTROLLING A SYNCHRONOUS GENERATOR OF A GEARLESS WIND ENERGY TURBINE

A method for controlling a synchronous generator of a gearless wind turbine is disclosed. The synchronous generator has an electrodynamic rotor and a stator for producing electrical power by rotating the rotor relative to the stator. The method includes generating a multiphase output current at the stator, supplying the output current to a rectifier, and controlling the output current using the rectifier in such a manner that a torque ripple of the generator is reduced. 1. A method comprising: generating a multiphase output current at the stator;', 'supplying the output current to a rectifier; and', 'controlling the output current using the rectifier such that a torque ripple of the generator is reduced., 'controlling a synchronous generator of a gearless wind turbine, the synchronous generator including an electrodynamic rotor and a stator for producing electrical power by rotating the rotor relative to the stator, wherein controlling the synchronous generator comprises2. The method according to claim 1 , comprising superposing claim 1 , by the rectifier claim 1 , a current waveform on the output current.3. The method according to claim 1 , wherein the synchronous generator is a six-phase generator and the rectifier is a six-phase controlled rectifier.4. The method according to claim 1 , wherein the rotor has a magnetic rotor flux and the method comprises controlling the output current based on the rotor flux.5. The method according to claim 4 , comprising determining the rotor flux using a state observer claim 4 , and wherein controlling the output current includes controlling the output current based on the rotor flux determined using the state observer.6. The method according to claim 1 , wherein:the generator has six phases and the stator has a double star connection with star points which are not connected,during operation, the generator has an electrical torque caused by an interaction of currents and fluxes, wherein the currents and fluxes are transformed ...

Managing Efficiency of an Engine-Driven Electric Generator

Systems and methods of managing an engine-driven electric generator. An example method may include populating an efficiency database with fuel provided and electrical power output data for the engine-driven electric generator. The method may also include receiving a desired electrical power output of the engine-driven electric generator. The method may also include adjusting fuel provided to the engine-driven electric generator to generate the desired electrical power output using the efficiency database. 1. A method of managing an engine-driven electric generator , comprising:populating an efficiency database with fuel provided to an engine and electrical power output data from the engine-driven electric generator;receiving a desired electrical power output of the engine-driven electric generator; andadjusting fuel provided to the engine-driven electric generator to generate the desired electrical power output using the efficiency database.2. The method of claim 1 , wherein populating the efficiency database is done during an initialization operation using predetermined data.3. The method of claim 1 , wherein populating the efficiency database is by dynamic and continuous self-populating during operation of the engine-driven electric generator.4. The method of claim 1 , wherein adjusting fuel provided optimizes efficient operation of the engine-driven electric generator for fuel consumption while still providing the desired power output within a predetermined range.5. The method of claim 1 , wherein receiving a desired electrical power output within specified tolerances of the desired electrical power output.6. The method of claim 1 , wherein adjusting fuel provided further comprises:determining a maximum/minimum value for the desired electrical power output;finding a new set point within the maximum/minimum value in the efficiency database; andsubstituting the new set point from the efficiency database with a current set point operating the engine-driven electric ...

Managing Efficiency of a Pool of Engine-Driven Electric Generators

Systems and methods of managing a pool of engine-driven electric generators. An example method may include populating an efficiency database with fuel provided and electrical power output data for each of the engine-driven electric generators in the pool. The method may also include receiving a desired electrical power output from the pool of the engine-driven electric generators. The method may also include adjusting fuel provided to at least one of the engine-driven electric generators in the pool to generate the desired electrical power output using the efficiency database. 1. A method of managing a pool of engine-driven electric generators , comprising:populating an efficiency database with fuel provided to an engine and corresponding electrical power output data from each of the engine-driven electric generators in the pool;receiving a desired electrical power output of the pool of engine-driven electric generators; andadjusting fuel provided to at least one of the engine-driven electric generators in the pool to generate the desired electrical power output by the pool, using the efficiency database.2. The method of claim 1 , wherein populating the efficiency database is done during an initialization operation using predetermined data for the engine-driven electric generators in the pool.3. The method of claim 1 , wherein populating the efficiency database is by dynamic and continuous self-populating during operation of the engine-driven electric generators in the pool.4. The method of claim 1 , wherein adjusting fuel provided optimizes efficient operation of the pool of engine-driven electric generators for fuel consumption while still providing the desired power output by the pool within a predetermined range.5. The method of claim 1 , wherein receiving a desired electrical power output by the pool is within specified tolerances of the desired electrical power output by the pool.6. The method of claim 1 , wherein adjusting fuel provided further comprises: ...

Operation of a local alternating current network with a genset and a ups

A frequency of an AC voltage of an AC grid present at a genset is defined by an UPS. The frequency is altered in one direction away from a desired frequency, if a power demand increases beyond a power supply in the AC grid, and in the other direction, if the power demand falls below the power supply. An alteration of the frequency in the one direction is limited to a maximum value in that missing power is temporarily fed out of an energy storage of the UPS into the AC grid. A shift of the frequency in the one direction is kept until no more power flows out of the energy storage. The genset responds to deviations of the frequency of the AC voltage from the desired frequency in the one and the other direction by an increase and a decrease of supplied genset power, respectively.

Recurring fault protection for wind power plants

A method for operating a wind turbine generator connected to a power network to account for recurring voltage faults on the power network caused by automatic reclosure of at least one circuit breaker following a short-circuit. The method comprises: identifying a deviation of voltage level of the power network from a normal operational voltage level of the network; determining that the identified deviation fulfils criteria for automatic reclosure; and operating the wind turbine generator in a recurring fault mode if automatic reclosure criteria are fulfilled. When operating the wind turbine generator in recurring fault mode, the method comprises: monitoring the recovery of the voltage level from the deviation; categorising the recovery of the voltage as one of at least a strong recovery or a weak recovery; and implementing a ride-through protocol according to the category of recovery.

METHOD FOR REGULATING PARALLELED ALTERNATORS IN ORDER TO DISTRIBUTE REACTIVE LOAD

Method for regulating a bank of alternators comprising at least two alternators that deliver their output in parallel to a load (C), said alternators each being provided with a regulator () that is configured to deliver an output signal representative of the reactive power level of the corresponding alternator divided by its nominal reactive power, and a control law allowing the reactive power level of the alternator to be modified depending on an input signal, method wherein a weighted signal employed as the input signal of these regulators is generated from the output signals representative of the reactive power level of each of the alternators, i.e. the signals delivered by the corresponding regulators, so as to make each of the alternators converge to a predefined reactive power level (T). 1. A method for regulating a bank of alternators comprising at least two alternators that deliver their output in parallel to a load , said alternators each being provided with a regulator that is configured to deliver an output signal representative of the reactive power level of the corresponding alternator divided by its nominal reactive power , and a control law allowing the reactive power level of the alternator to be modified depending on an input signal ,method wherein a weighted signal employed as the input signal of these regulators is generated from the output signals representative of the reactive power level of each of the alternators, i.e. the signals delivered by the corresponding regulators, so as to make each of the alternators converge to a predefined reactive power level.2. The method according to claim 1 , the weighted signal being the arithmetic mean of the output signals representative of the reactive power level of each of the alternators.3. The method according to claim 1 , a new voltage setpoint being calculated by each regulator depending on a discrepancy between the current reactive power level and the level corresponding to the input signal claim 1 , ...

METHOD AND APPARATUS FOR CONTROLLING REACTIVE POWER OF GENERATOR IN POWER PLANT

A method and apparatus for controlling a reactive power of a generator in a power plant are provided. The method includes: S1, dividing a plurality of power plants into a plurality of plant-plant coordination groups; S2, dividing generators into a first generator and a second generator set; S3, calculating a deviation between a measured voltage and a preset voltage of a central bus; S4, comparing the deviation with a control dead band threshold; S5, establishing a reactive power tracking model if the deviation is greater than the control dead band threshold; S6, establishing a reactive power keeping model; and S7, obtaining sum reactive power adjustments of the generators according to the first reactive power adjustments and the second reactive power adjustments, and obtaining voltage adjustments of buses according to the sum reactive power adjustments. 1. A method for controlling a reactive power of a generator in a power plant , comprising:S1, dividing a plurality of power plants in a reactive power and voltage control subregion into a plurality of plant-plant coordination groups according to mutual coupling coefficients, wherein each plant-plant coordination group comprises at least one power plant, and a mutual coupling coefficient of one power plant belonging to a plant-plant coordination group and another power plant belonging to the plant-plant coordination group is greater than or equal to a preset coefficient if the plant-plant coordination group comprises at least two power plants;S2, dividing generators in the reactive power and voltage control subregion into a first generator set participating in a reactive power redistribution in a reactive power and voltage control and a second generator set not participating in the reactive power redistribution according to the plurality of plant-plant coordination groups;S3, calculating a deviation between a measured voltage and a preset voltage of a central bus in the reactive power and voltage control subregion;S4, ...

Electric Motor/Generator

Certain embodiments are directed to devices, methods, and/or systems that use electrical machines. For example, certain embodiments are directed to an electrical machine comprising: at least one stator at least one module, the at least one module comprising at least one electromagnetic coil and at least one switch, the at least one module being attached to the at least one stator; at least one rotor with a plurality of magnets attached to the at least one rotor, wherein the at least one module is in spaced relation to the plurality of the magnets; and the at least one rotor being in a rotational relationship with the at least one stator, wherein the quantity and configuration of the at least one module in the electrical machine is determined based in part on one or more operating parameters; wherein the at least one module is capable of being independently controlled; and wherein the at least one module is capable of being reconfigured based at least in part on one or more of the following: at least one operating parameter during operation, at least one performance parameter during operation, or combinations thereof. Other embodiments are also disclosed. 122-. (canceled)23. An electric machine comprising:at least one rotor having a plurality of permanent magnets arranged in a circular array about an axis of rotation; andat least one stator having a plurality of modules detachably mounted thereto, each module comprising at least one electromagnetic coil and at least one switch,wherein the modules are arranged such that in use, generated magnetic flux passes across a gap between the stator and the rotor substantially parallel to said axis of rotation, andwherein each module is independently controllable and/or reconfigurable during operation of the machine.24. The electric machine as claimed in claim 23 , wherein each module is individually removable claim 23 , insertable and/or replaceable during operation of the machine.25. The electrical machine as claimed in claim ...

METHOD AND APPARATUS FOR REGULATING AN OUTPUT VOLTAGE OF AN ALTERNATOR

A method of regulating an output voltage of an alternator. The method comprises measuring first and second external contacts of the alternator regulator module operably coupled to first and second output contacts of the alternator respectively during an ON state of an excitation cycle for the alternator, measuring a second voltage across the first and second external contacts of the alternator regulator module during an OFF state of an excitation cycle for the alternator, deriving an average voltage value of the first and second voltage measurements, and deriving an offset value based at least partly on the derived average voltage value. 1. A method of regulating an output voltage of an alternator , the method comprising , within an alternator regulator module:measuring a first voltage across a first external contact of the alternator regulator module operably coupled to a first output contact of the alternator and a second external contact of the alternator regulator module operably coupled to a second output contact of the alternator during an ON state of an excitation cycle for the alternator;measuring a second voltage across the first external contact of the alternator regulator module and the second external contact of the alternator regulator module during an OFF state of an excitation cycle for the alternator;deriving an average voltage value of the first and second voltage measurements; andderiving an offset value based at least partly on the derived average voltage value, measuring an instantaneous voltage across the first external contact of the alternator regulator module and the second external contact of the alternator regulator module; and', 'configuring a control signal for regulating the output voltage of the alternator based at least partly on the instantaneous voltage measurement and the derived offset value., 'wherein the method further comprises2. The method of claim 1 , wherein the method comprises measuring the first voltage across the first ...

POWER GENERATION SYSTEM, SYSTEM FOR SUPPRESSING SUB-SYNCHRONOUS OSCILLATION AND METHOD FOR CONTROLLING OPERATION OF POWER SYSTEM

The present invention discloses a power generation system including a double-fed induction generator, a power converter, and a controller. The double-fed induction generator includes a rotor and a stator coupled to a grid. The power converter includes a rotor side converter coupled to the rotor of the generator, a grid side converter coupled to the grid, and a DC bus coupled between the rotor side converter and the grid side converter. The controller includes a rotor side controller for controlling the rotor side converter and a grid side controller for controlling the grid side converter. The rotor side controller includes a compensator having a transfer function and configured to counter a negative resistance effect of the generator to suppress sub-synchronous oscillations. The present invention further discloses a system for suppressing sub-synchronous oscillations and a method for controlling operation of a power system. 1. A power generation system , comprising:a doubly-fed induction generator comprising a stator coupled to an electrical grid and a rotor; a rotor side converter coupled to the rotor of the generator;', 'a grid side converter coupled to the electrical grid; and', 'a DC link coupled between the rotor side converter and the grid side converter; and, 'a power converter comprising a rotor side controller for controlling the rotor side converter, comprising a compensator for compensating a negative resistance effect of the generator to damp sub-synchronous oscillation; and', 'a grid side controller for controlling the grid side converter., 'a controller comprising2. The power generation system of claim 1 , wherein the rotor side controller comprises:a current regulator for generating a rotor voltage command of the rotor based on a rotor current error between a rotor current command of the rotor and a rotor current feedback of the rotor; wherein the compensator is introduced to the current regulator and is configured to compensate the rotor voltage ...

Electromagnetic platform motor (EPM) (EPM-1) (EPM-2)

The presence invention is an electromagnetic platform motor on track wheels that convert reciprocating motion into rotation motion that produces torque force and speed that rotates the shaft of electric generator producing electricity. The invention uses an electromagnetic aluminum tube magnetic force field to repel and attract super strong permanent magnets attached on opposite side of a platform with wheels to move forward and backward, in and out of the electromagnetic aluminum tube with force. A mechanical advantage ratchet mechanism connected to the platform converts the reciprocating motion, forward movement and backward movement to rotational motion that produces torque force and speed that rotates the shaft of the electric generator producing electricity. 1. Inventor claims that this invention , Electromagnetic Platform Motor (EPM) is an electromagnetic mechanical advantage motors that produce torque force and speed that rotates the shaft of an electric generator. The invention is comprised of:2. means to have a MOTOR PLATFORM SECTION attached with metal track wheels on the frame four corners;3. means to attach on the opposite sides of the MOTOR PLATFORM SECTION frame two separate groups of powerful magnets where the magnetic polarity of the North pole of one group is facing the North pole magnetic polarity of the opposite magnet group but space several inches apart;4. means to wind 3 ,003 feet of enameled magnet copper wire , gauge 18 around a 15 inch aluminum tube with a 2 inch open , and the means to secure the ELECTROMAGNETIC ALUMINUM TUBE to a position in the center of the MOTOR PLATFORM SECTION frame.5. means for the two groups of powerful magnets attached to the MOTOR PLATFORM SECTION to moves in and out of the ELECTROMAGNETIC ALUMINUM TUBE with ease;6. means to have D.C. current of 150 volts to activate the ELECTROMAGNET ALUMINUM TUBE electromagnetic force field; means to have the electromagnetic force field inside the tube to repel and pull at the ...

Magnetic Flux Cancellation for Power Line Communications

An apparatus comprising a signal transformer coupled to a power line and a signal transmission, reception, or detection circuit. A sensor is configured to be responsive to the power line current or magnetic flux generated in a ferrite core of the signal transformer. When the sensor indicates that the flux generated by the power line current mat cause an attenuation of the signal strength, a second circuit generates a current through a flux cancelling winding that cancels at least some of the flux generated by the power line current. 2. An apparatus comprising:a ferrite core;a first winding wrapped around the ferrite core, wherein the first winding is configured to connect to a power generation system using a power line;a second winding configured to transmit or receive a signal on the power line using the ferrite core, wherein the second winding is wrapped around the ferrite core and is connected to a first circuit;a sensor;a third winding wrapped around the ferrite core; anda second circuit connected to the third winding and the sensor, wherein the second circuit and the third winding are configured to produce a magnetic flux that cancels at least in part a magnet flux produced in the ferrite core by the first winding.21. The apparatus of claim , wherein the signal comprises an electrical arc generated noise , and wherein the first circuit comprises an arc detection circuit.3. The apparatus of claim 2 , wherein the sensor comprises a current sensor claim 2 , and wherein the second circuit is configured to:monitor sensor values;compute, based on the sensor values, a current value of the power line;compare the current value to a reference value; andapply the cancelling magnetic flux based on the comparison of the current value to the reference value.41. The apparatus of claim claim 2 , wherein the signal comprises a communication signal claim 2 , and wherein the first circuit comprises a communication circuit.5. The apparatus of claim 4 , wherein the second circuit ...

INDEPENDENT-SPEED-VARIABLE-FREQUENCY-GENERATOR-BASED CONSTANT FREQUENCY AND NARROW-BAND VARIABLE FREQUENCY POWER SYSTEMS AND METHODS

A system may include an independent speed variable frequency (ISVF) generator configured to convert torque from a shaft to an AC power signal. The ISVF generator may have one or more pole pairs with an equivalent shaft frequency equaling a shaft frequency multiplied by the number of pole pairs. A generator control unit may set a generator output frequency of the ISVF generator equal to a lower frequency limit of an AC bus when the equivalent shaft frequency is less than the lower frequency limit, set the generator output frequency of the ISVF generator equal to an upper frequency limit of the AC bus when the equivalent shaft frequency is greater than the upper frequency limit, and set the generator output frequency of the ISVF generator equal to the equivalent shaft frequency when the equivalent shaft frequency is between the lower frequency limit and the upper frequency limit. 1. A system comprising:a prime mover configured to rotate a shaft;an independent speed variable frequency (ISVF) generator configured to convert torque from the shaft to an alternating current (AC) power signal, wherein the ISVF generator has one or more pole pairs, and wherein an equivalent shaft frequency equals a shaft frequency of the shaft multiplied by a number of the pole pairs;an AC bus having a lower frequency limit and an upper frequency limit; and set a generator output frequency of the ISVF generator equal to the lower frequency limit when the equivalent shaft frequency is less than the lower frequency limit;', 'set the generator output frequency of the ISVF generator equal to the upper frequency limit when the equivalent shaft frequency is greater than the upper frequency limit; and', 'set the generator output frequency of the ISVF generator equal to the equivalent shaft frequency when the equivalent shaft frequency is greater than or equal to the lower frequency limit and less than or equal to the upper frequency limit., 'a generator control unit configured to2. The system of ...

SOLID STATE POWER SUPPLY CONFIGURATION FOR MULTIPLE ENGINE SYSTEMS

A power generation system is disclosed. The power generation system may include a first engine and a second engine. The power generation system may include an alternating current (AC) generator coupled to the first engine and a solid state power supply connected to the AC generator via a first circuit. The power generation system may include a first energy storage device associated with the first engine, connected to the solid state power supply via a second circuit, and a first engine control module (ECM) associated with the first engine, connected to the solid state power supply via the second circuit. The power generation system may include a second energy storage device associated with the second engine, connected to the solid state power supply via the second circuit, and a second ECM associated with the second engine, connected to the solid state power supply via the second circuit. 1. An engine system , comprising:an engine;an alternating current (AC) generator coupled to the engine;a solid state power supply connected to the AC generator via a first circuit;an energy storage device connected to the solid state power supply via a second circuit;an engine control module (ECM) connected to the solid state power supply via the second circuit; anda starter connected to the solid state power supply via the second circuit.2. The engine system of claim 1 , wherein the solid state power supply includes a rectifier to convert alternating current electricity to direct current electricity.3. The engine system of claim 1 , wherein the solid state power supply is to provide diagnostic information regarding the AC generator.4. The engine system of claim 1 , wherein the solid state power supply is to provide direct current electricity to the energy storage device claim 1 , the ECM claim 1 , or the starter via the second circuit.5. The engine system of claim 1 , wherein the solid state power supply is to provide direct current electricity at an ambient temperature range of − ...

METHOD FOR DETECTION OF UPCOMING POLE SLIP

A method for detecting an imminent pole slip of a synchronous generator electrically connected to a power supply network, whereby a signal characteristic of a power fault is detected and an imminent pole slip is determined via a predefinable value when a load angle of the synchronous generator increases, whereby the following steps are performed. Determination of a first load angle during operation without a power fault, determination of a generator frequency as a function of time when a power fault occurs, and precalculation of a second value of a load angle resulting from the power fault by adding the first value of the load angle to a load angle difference occurring during the power fault, whereby this load angle difference is caused by a deviation of a generator frequency relative to a power frequency. 1. The method for detecting an imminent pole slip of a synchronous generator electrically connected to a power supply network , wherein a signal characteristic of a power fault is detected and an imminent pole slip is determined via a predefinable value when a load angle of the synchronous generator increases , comprising the following steps:determination of a first load angle during operation without a power fault,determination of a generator frequency as a function of time when a power fault occurs, andprecalculation of a second value of a load angle resulting from the power fault by adding the first value of the load angle to a load angle difference occurring during the power fault, wherein this load angle difference is caused by a deviation of a generator frequency relative to a power frequency.2. A method according to claim 1 , wherein after detecting a signal characteristic of a power fault claim 1 , a load angle difference is determined between a polar wheel voltage and the generator voltage claim 1 , which load angle difference is caused by a deviation of a generator frequency relative to a power frequency.3. A method according to claim 1 , wherein the ...

POWER GENERATION CONTROLLER FOR VEHICLE AC POWER GENERATOR

When a state where a power-generation voltage of a vehicle AC power generator is the same as or lower than a predetermined voltage has continued for a predetermined time or longer, a power generation controller stops or disables a low-voltage protection circuit from performing its operation so that an unintentional voltage rise caused by the low-voltage protection circuit is prevented. 15-. (canceled)6. A power generation controller for a vehicle AC power generator comprising:a voltage control circuit that controls a power-generation voltage of an AC power generator main body by controlling a field current flowing in a field coil of the AC power generator main body to be mounted in a vehicle;a low-voltage protection circuit that performs operation of increasing the field current so as to raise the power-generation voltage, regardless of control of the power-generation voltage by the voltage control circuit, when the power-generation voltage or a voltage based on the power-generation voltage becomes lower than a predetermined voltage; anda low-voltage-protection continuous operation prevention circuit that stops the low-voltage protection circuit from performing the operation, when the operation performed by the low-voltage protection circuit has continued for a time exceeding a predetermined time.7. The power generation controller for a vehicle AC power generator according to claim 6 , includingan internal power source that supplies electric power to at least the voltage control circuit, the low-voltage protection circuit, and the low-voltage-protection continuous operation prevention circuit, anda reset circuit that detects a rise in a voltage of the internal power source and then outputs a reset signal,wherein the low-voltage protection circuit and the low-voltage-protection continuous operation prevention circuit are enabled by the reset signal outputted from the reset circuit, and are disabled when the low-voltage-protection continuous operation prevention ...

FIRST PATENT MAGNETIC PROPULSION METHOD

A rotating magnet electrical power generator. The apparatus may be used with any electrical generator that uses a rotating magnet assembly. A key aspect of the invention is the neutralization of one of the pair of rotating magnets, the neutralization occurring at predetermined intervals. Neutralization is effected by blocking the magnetic field of the stationary magnet using a cam operated metal enclosure or metal plates. The metal field blocker, which is made from mostly iron, is dynamically positioned in accordance with the relative positions of the stationary and rotating magnets. The iron enclosure (or plates) may be connected to a brushless servo or brushless stepper motor to precisely control the switching without a mechanical cam timing. In an alternative embodiment, the magnets are neutralized by stacking a pair of cylindrical magnets end to end, enclosing the magnets at least partially in a field blocking enclosure, and rotating the magnets relative to each other to effect neutralization. 2. The mechanism of wherein said magnets are cylindrical.3. The mechanism of wherein said magnets are axially aligned and axially separated by said predetermined distance.4. The mechanism of wherein said predetermined distance is between 0.0001 to 0.045 inches.5. The mechanism of wherein said metallic sleeve is made from at least 97% iron. The present invention relates to power generation. More particularly, the invention discloses a device that generates electricity from a rotating magnet assembly.Power generating devices using rotating magnet assemblies are well known in the art. Both generators and alternators run on the basic principle of producing electricity from an AC magnetic field. A type of power generator similar to the inventive device is shown in world patent number WO1990010337 issued to Troy Reed. According to the Reed patent “This is a magnetic motor having a crankshaft mounted between two stationary disk-like magnetic holders. Preferably eight permanent ...

ADJUSTMENT OF PARAMETER VALUES OF A CONTROL RULE OF A GENERATOR

Method for controlling a generator comprising an inverter and an electrical energy source, the generator being configured to deliver output electrical values to an electrical distribution grid, the inverter being controlled by a control law, the control law comprising a set of fixed values of parameters for modelling the functioning of a synchronous virtual generator so that the control law is configured to determine at least one target output value that must be delivered by the generator to the electrical distribution grid. 1. A method for controlling a generator comprising an inverter and an electrical energy source , the generator being configured to deliver output electrical values to an electrical distribution grid , the generator being controlled by a control law , the control law comprising a set of fixed values of parameters for modelling the functioning of a virtual generator so that the control law is configured to determine at least one target output value that must be delivered by the generator to the electrical distribution grid , the method comprising:determining at least one target output value by means of the control law;comparing the target output value with at least one allowable maximum value of the generator;if the target output value is higher than the allowable maximum value, determining a modified value of at least one parameter of the control law.2. The method according to claim 1 , comprising claim 1 , if the target output value is less than or equal to the allowable maximum value claim 1 , keeping the fixed value of the parameter of the control law.3. The method according to claim 1 , wherein the steps of the method are repeated periodically claim 1 , the control law comprising claim 1 , during the following iteration k+1 of the method claim 1 , the value of the parameter determined during the previous iteration k.4. The method according to claim 3 , wherein the steps of the method are repeated at a frequency greater than 1 kHz claim 3 , or ...

SYSTEMS AND METHODS FOR OPERATING A POWER GENERATING ASSET

A system and method are provided for operating a power generating asset having a generator operably coupled to a power grid. The generator having a rotor and a stator. The stator being operably coupled to a transformer, and ultimately to the power grid, via a sync-switch assembly. The sync-switch assembly having a plurality of switching devices electrically coupled in parallel. Accordingly, a controller detects an approach of at least one operating parameter of the power generating asset to a first parameter threshold. In response to detecting the approach of the operating parameter to the first parameter threshold, the controller independently changes an operating state of a first switching device of the plurality of switching devices of the sync-switch assembly. Each switching device of the plurality of switching devices is independently controllable via the controller. 1. A method for operating a power generating asset having a generator with a rotor and a stator , the stator being operably coupled to a transformer via a sync-switch assembly , the sync-switch assembly having a plurality of switching devices electrically coupled in parallel , the method comprising:detecting, via a controller, an approach of at least one operating parameter of the power generating asset to a first parameter threshold; andindependently changing, via the controller, an operating state of a first switching device of the plurality of switching devices of the sync-switch assembly in response to the detected approach, wherein each switching device of the plurality of switching devices is independently controllable via the controller.2. The method of claim 1 , further comprising:detecting, via the controller, an approach of the at least one operating parameter to a second parameter threshold; andindependently changing, via the controller, an operating state of a second switching device of the sync-switch assembly.3. The method of claim 2 , wherein the approach at least one operating ...

Electric Motor/Generator

Certain embodiments are directed to devices, methods, and/or systems that use electrical machines. For example, certain embodiments are directed to an electrical machine comprising: at least one stator at least one module, the at least one module comprising at least one electromagnetic coil and at least one switch, the at least one module being attached to the at least one stator; at least one rotor with a plurality of magnets attached to the at least one rotor, wherein the at least one module is in spaced relation to the plurality of the magnets; and the at least one rotor being in a rotational relationship with the at least one stator, wherein the quantity and configuration of the at least one module in the electrical machine is determined based in part on one or more operating parameters; wherein the at least one module is capable of being independently controlled; and wherein the at least one module is capable of being reconfigured based at least in part on one or more of the following: at least one operating parameter during operation, at least one performance parameter during operation, or combinations thereof. Other embodiments are also disclosed. 1. An electrical machine comprising:at least one stator; andat least one module, the at least one module comprising at least one electromagnetic coil and at least one switch, the at least one module being attached to the at least one stator;wherein the quantity and configuration of the at least one module in the electrical machine is determined based in part on one or more operating parameters;wherein the at least one module is capable of being independently controlled; andwherein the at least one module is capable of being reconfigured based at least in part on one or more of the following: at least one operating parameter during operation, at least one performance parameter during operation, or combinations thereof.2. The electrical machine of claim 1 , further comprising one of the following:at least one rotor ...

INTAKE-ADAPTABLE GAS GENERATOR

A system includes a generator using a fluid mixture obtained via a generator inlet, a compressor having a compressor inlet that is connected to a generator outlet by a first set of conduits, a second set of conduits connected to the compressor outlet and the generator inlet, and a sensor in communication with the second set of conduits, where a portion of the fluid mixture includes gas from a hydrocarbon well, and where exhaust fluid of the generator is provided to the compressor. A process includes obtaining a target fluid property and a fluid measurement using the sensor and modifying a parameter of a fluid control device to modify a first flow rate of the flow of the exhaust fluid through the second set of conduits relative to a second flow rate of the flow of the gas provided by the hydrocarbon well through the first set of conduits. 1a gas generator to generate electrical energy using a fluid mixture obtained via a generator inlet of the gas generator, wherein a portion of the fluid mixture comprises gas provided by a hydrocarbon well;a compressor, wherein a compressor inlet of the compressor is attached to a generator outlet of the gas generator by a first set of conduits, and wherein exhaust fluid of the gas generator is provided to the compressor via the first set of conduits, and wherein the first set of conduits comprises a conduit attached to the hydrocarbon well;a second set of conduits connecting a compressor outlet of the compressor to the generator inlet;a sensor in communication with the second set of conduits, wherein the sensor measures fluid properties of fluids flowing through a portion of the second set of conduits; obtaining, with the computer system, a target fluid property of the fluid mixture entering the generator inlet;', 'obtaining, with the computer system, a fluid measurement of the fluid mixture using the sensor;', 'determining, with the computer system, whether the fluid measurement satisfies a criterion based on the target fluid ...

Prime mover generator system for simultaneous synchronous generator and condenser duties

An electric power generation plant has at least two synchronous machines and a source of mechanical power (torque), coupleable such that one or more of the synchronous machines can be operated as a generator while one or more is operated as a synchronous condenser. Field exciters, controlled shaft couplings, starters and switching sequences control starting, restarting and switching into simultaneous operation as generators, as condensers, or as one or more generators and condensers synchronously coupled to one another along a drive train. The disclosed configurations include modifications of existing generator installations such as decommissioned plants, such as by controllably coupling a second synchronous machine to a drive train, for use as a condenser for power factor control when needed or as an added source of generator capacity during times of high demand.

Connection for improved current balancing between parallel bridge circuits

A connection for parallel bridge circuits in a power converter is provided. In particular, a power converter can be used to provide a desired power to a load, such as a generator, motor, electrical grid, or other suitable load. The power converter can include a plurality of bridge circuits coupled in parallel. A bridge output of each of the parallel bridge circuits can be coupled together at the load instead of at the power converter. In particular, the parallel bridge circuits can be coupled together at a location that is physically proximate the physical location of the load, such as at a plurality of terminals associated with the load. By doing so, stray inductance associated with conductors used to couple the bridge outputs of the parallel bridge circuits to the load can be effectively coupled between the parallel bridge circuits.

Power generator device

A power generator device includes a heavy gyro body, at least one rotation-driving device and a control unit. The heavy gyro body is coupled to a power source and an induction power generator, the power source drives the heavy gyro body to rotate so as to drive the induction power generator to produce electricity. The rotation-driving device is located at an edge of the heavy gyro body and conducting a contact or non-contact interaction with an annular part in reaction to drive the heavy gyro body to rotate about a vertical spindle. The control unit is configured for starting the rotation-driving device to accelerate the speed of the heavy gyro body when a rotation speed of the heavy gyro body is less than a first predetermined rotation speed.

Device and Method for Over-current Protection

An over-current protection device for a power generator includes a first pin, configured to receive a signal; a detection and control module, coupled to the first pin, and configured to detect the signal to determine whether the signal conforms to a pre-determined condition or not, and to output a control signal when the signal conforms to the pre-determined condition; and an auto-trim and memory module, coupled to the detection and control module, and configured to receive the control signal from the detection and control module for executing corresponding auto-trim measurements and storing corresponding adjustment data. 1. An over-current protection device for a power generator , comprising:a first pin, configured to receive a signal;a detection and control module, coupled to the first pin, and configured to detect the signal to determine whether the signal conforms to a pre-determined condition or not, and to output a control signal when the signal conforms to the pre-determined condition; andan auto-trim and memory module, coupled to the detection and control module, configured to receive the control signal from the detection and control module for executing corresponding auto-trim measurements and storing corresponding adjustment data.2. The over-current protection device of claim 1 , wherein the detection and control module is configured to detect a voltage level claim 1 , a voltage waveform claim 1 , a voltage frequency claim 1 , a voltage duty cycle claim 1 , a current size claim 1 , a current frequency or a current variation cycle of the signal.3. The over-current protection device of claim 2 , wherein the auto-trim and memory module further comprises a memory unit to store different auto-trim measurements corresponding to the control signal.4. The over-current protection device of claim 3 , further comprising:a second pin, coupled to the detection and control module, configured to receive the signal;wherein the detection and control module detects a ...

Electric power generating system with a synchronous generator

A synchronous generator may comprise a rotor and a stator. The stator may comprise a first armature winding configured to output a first three-phase voltage and a second armature winding configured to output a second three-phase voltage. The synchronous generator may further comprise a first rectifier configured to rectify the first three-phase voltage received from the first armature winding, and a second rectifier configured to rectify the second three-phase voltage received from the second armature winding.

PORTABLE AND SCALABLE POWER GENERATING SYSTEMS AND METHODS THEREOF

The present disclosure provides a portable power generating system configured to utilize self-sustained energy to provide velocity and movement to turn a central tubular axle which is encompassed by two or more magnets spread evenly around the circumference of the axle to generate motion. The motion of the revolving magnets turns the armature of one or more DC power generating motors which in turn produce electricity. The central tubular axle supported by two DC power generating motors are connected to each end of the central tubular axle. One of the DC power generating motors revolves in a clockwise direction during operation and the DC power generating motor at the opposite end of the central tubular axle is configured to operate in an anti-clockwise motion during operation. 1. A portable power generating system comprising:at least one axle;one or more magnets located on a central part of the at least one axle such that the one or more magnets is spread evenly around a circumference of the at least one axle;at least two direct current power generating motors connected to two opposite ends of the at least one axle; andat least one battery;wherein at least one direct current power generating motor of the at least two direct current power generating motors is connected to the at least one battery;wherein the at least one battery is configured to turn the at least one axle at a high revolution speed through the at least one direct current power generating motor;wherein the at least one axle at the high revolution speed rotates the one or more magnets;wherein the at least two direct current power generating motors generates direct current power when the rotation of the one or more magnets turns an armature of the at least two direct current power generating motors; andwherein the at least two direct current power generating motors connected to the at least one axle are configured to form a stackable structure to produce multiples of the direct current power.2. The ...

LOW-POWER BIAS SUPPLY TO FACILITATE THE LOW-RPM STARTUP OF THREE-PHASE AC AIRCRAFT GENERATORS

System and methods for providing power to a generator control circuit are provided. Aspects include a generator, a first power converter comprising a first input and a first output, the first input coupled to an output of the generator and the first output coupled to a valve circuit, a second power converter comprising a second input and a second output, the second input coupled to the output of the generator and the second output coupled to the valve circuit, and a controller configured to monitor a characteristic associated with the generator, cause the first power converter to provide power to the valve circuit when the characteristic of the generator is within a first range of characteristic values, and cause the second power converter to provide power to the valve circuit when the characteristic of the generator is within a second range of characteristic values. 1. A power supply for a generator control circuit comprising:a generator;a first power converter comprising a first input and a first output, the first input coupled to an output of the generator and the first output coupled to a valve circuit;a second power converter comprising a second input and a second output, the second input coupled to the output of the generator and the second output coupled to the valve circuit; and monitor a characteristic associated with the generator;', 'cause the first power converter to provide power to the valve circuit when the characteristic of the generator is within a first range of characteristic values; and', 'cause the second power converter to provide power to the valve circuit when the characteristic of the generator is within a second range of characteristic values., 'a controller configured to2. The power supply of claim 1 , wherein the first range of characteristic values is lower than the second range of characteristic values.3. The power supply of claim 1 , wherein the first range of characteristic values overlaps with the second range of characteristic ...

HARMONIC CONTROL OF A CONVERTER

Provided is an arrangement for determining an operation parameter reference for controlling a generator side converter portion coupled to a generator, in particular of a wind turbine, the arrangement comprising: an arithmetic element configured to derive a fundamental current error by subtracting a, in particular unfiltered, generator output current from a sum of a fundamental current reference and at least one harmonic current reference; a fundamental current controller adapted to determine a fundamental operation parameter reference based on the fundamental current error; at least one other arithmetic element configured to derive at least one harmonic current error by subtracting a, in particular band pass filtered according to the harmonics, generator output current from the at least one harmonic current reference; at least one harmonic current controller configured to determine at least one harmonic operation parameter reference based on the harmonic current error. 1. An arrangement for determining an operation parameter reference for controlling a generator side converter portion coupled to a generator of a wind turbine , the arrangement comprising:an arithmetic element configured to derive a fundamental current error by subtracting an unfiltered, generator output current from a sum of a fundamental current reference and at least one harmonic current reference;a fundamental current controller adapted to determine a fundamental operation parameter reference based on the fundamental current error;at least one other arithmetic element configured to derive at least one harmonic current error by subtracting a band pass filtered according to the harmonics, generator output current from the at least one harmonic current reference;at least one harmonic current controller configured to determine at least one harmonic operation parameter reference based on the harmonic current error;still another arithmetic element configured to determine the operation parameter ...

ELECTRICAL SYSTEMS

Electrical systems for connecting rotary electric machines to dc networks operating at different voltages V and W where V>W are provided, along with gas turbine engine arrangements incorporating such systems. 1. An electrical system for connecting a rotary electric machine to dc networks operating at different voltages V and W where V>W , the electric machine having N≥2 independent phases each having a respective index n=(1 , . . . , N) , the electrical system comprising:a first set of N ac-dc converter circuits connected in a modular multilevel configuration, each ac-dc converter circuit having a respective index n=(1, . . . , N) and an ac interface for connection with a corresponding nth phase of the electric machine, and in which the modular multilevel configuration has P=N+1 dc outputs each having a respective index p=(1, . . . , P) wherein the potential difference between the pth output and the (p+q)th output is qV/N, where q=(0, . . . , P−p),a set of N dc-dc converter circuits each having a respective index n=(1, . . . , N) and being configured to convert dc power between a voltage V/N at a first dc interface and a voltage W at a second dc interface, wherein, for all n, a first dc interface of the nth dc-dc converter circuit is connected with the p=nth and p=(n+1)th dc outputs of the modular multilevel configuration.2. The electrical system of claim 1 , in which 0.5 W≤V/N≤2 W.3. The electrical system of claim 2 , in which 0.8 W≤V/N≤1.3 W.4. The electrical system of claim 1 , in which N is even and the ([N/2]+1)th dc output of the modular multilevel configuration is connected to an electrical ground.5. The electrical system of claim 1 , in which W is 540 volts.6. The electrical system of claim 1 , in which V is from 1 kilovolt to 10 kilovolts.7. The electrical system of claim 6 , in which V is from 1 kilovolt to 3 kilovolts.8. The electrical system of claim 1 , in which the first set of N ac-dc converter circuits are bidirectional ac-dc converter circuits.9. ...

ELECTRIC MACHINE CONTROL SYSTEMS AND METHODS

A system and method include monitoring an operating condition of an electric machine that converts rotational movement into an output voltage that is conducted into a circuit coupled with the electric machine, controlling operation of the electric machine using pulse width modulation signals, and changing a magnitude of the output voltage that is conducted into the circuit from the electric machine as a result of the pulse width modulation signals. 1. A method comprising:monitoring an operating condition of an electric machine that converts rotational movement into an output voltage that is conducted into a circuit coupled with the electric machine;controlling operation of the electric machine using pulse width modulation signals; andchanging a magnitude of the output voltage that is conducted into the circuit from the electric machine as a result of the pulse width modulation signals.2. The method of claim 1 , wherein the magnitude of the output voltage is changed as the result of the pulse width modulation signals independent of one or more of:a force applied to the electric machine or a load placed on the circuit.3. The method of claim 1 , wherein controlling the operation of the electric machine includes creating an additional magnetic field in the electric machine using the pulse width modulation signals that opposes a force applied to the electric machine.4. The method of claim 1 , wherein controlling the operation of the electric machine using the pulse width modulation signals transforms energy during each cycle of the pulse width modulation signals claim 1 , the magnitude of the output voltage changed by rectifying the energy that is transformed to increase the output voltage above a threshold voltage associated with a current operating speed of the electric machine.5. The method of claim 1 , further comprising:determining a change in load demand of the circuit, the operation of the electric machine controlled using the pulse width modulation signals and ...

Multiple Induction Electric Motor And Vehicle

A novel multiple induction electric motor system that separately produces synchronized variable frequency alternating current control signals and using multiple induction electric motors, produces synchronized rotating magnetic fields responsive to the control signals, induces magnetic fields around a conductor in inductive rotors responsive to the rotating magnetic fields, and applies rotational forces between the rotating magnetic fields and the induced magnetic fields to a common shaft of the multiple motors. The common shaft sums the rotational forces and transmits the rotational forces to a drive wheel. Such a system can be implemented using two, three or more synchronized induction electric motors, and respective elements thereof, wherein the stator and rotor laminations can be arranged, stacked and/or otherwise configured such that the multiple induction electric motors operate at lower temperatures and at higher efficiencies. 1. A system for coupling a rotational force of a plurality of motors , comprising:a first motor drive controller and a first motor; anda second motor drive controller and a second motor,wherein said first motor drive controller is configured to produce a first control signal in response to an operating signal for driving said first motor to produce a rotational force,said second motor drive controller is configured to produce a second control signal for driving said second motor to produce a rotational force, andwherein said rotational force of said first motor is coupled with said rotational force of said second motor.2. The system for coupling a rotational force of a plurality of motors of claim 1 , wherein said second motor drive controller is configured to drive said second motor to produce said rotational force of said second motor that is synchronized with said rotational force of said first motor.3. The system for coupling a rotational force of a plurality of motors of claim 1 , further comprising a shaft configured to couple ...

Electric power converter

The present invention relates to a rush current limiting circuit in which a series circuit consisting of an inductor and a resistor for detecting a current is connected between a power source and a first semiconductor switch, in which there is provided a second semiconductor switch whose inter-output-terminal voltage is controlled by the voltage across the series circuit consisting of the inductor and the resistor for detecting a current, and in which the inter-output-terminal voltage of the second semiconductor switch controls the inter-control-terminal voltage of the first semiconductor switch so as to limit a current to a load; the present invention relates also to an electric power converter including the rush current limiting circuit.

BATTERY ENERGY STORAGE SYSTEM INTEGRATED WITH ELECTRICAL GENERATION SITE

A method of creating an interconnected combination of a stored energy electric generation system to a variable electric power generation system, said combination, and a method of operating same. A stored energy electric generation system is added to a variable output electric power generation system. An input/output of the stored energy electric power generation system is connected to a power output of the variable electric power generation system and an indicator of power flow level through the power input/output of the stored energy electric power generation system is provided to a controller of the variable electric power generation system. The controller is configured to adjust the output power of the variable electric power generation system based on the indicator of the present stored energy system electric power flow level and a present site output electric power level. 1. A method of operating an interconnected variable electric power generation system and stored energy electric generation system , the method comprising:determining a present stored energy system electric power flow level comprising electric power flowing through a power input/output of a stored energy electric power generation system, the power input/output of the stored energy electric power generation system and a variable output electric power generation system being connected to provide electric power to an electric power output through a site output power meter;receive, from the site output power meter, a present site output electric power level provided to the electric power output; andcontrolling, based on both the present site output electric power level and the present stored energy system electric power flow level through the power input/output of the stored energy electric power generation system, an electric power output of the variable output electric power generation system.2. The method of claim 1 , where the variable output electric power generation system comprises an ...

MAGNETIC FLYWHEEL ENERGY MANAGEMENT SYSTEM AND METHOD

Flywheel based electrical energy management system and device. The device will often comprise at least one shaft mounted flywheel, each flywheel comprising a flywheel mass that contains a plurality of permanent magnets. The flywheel spins within at least one stator comprising a plurality of magnetic pickup coils configured so that the flywheel mass can rotate freely within the stator. The flywheel may be placed in a vacuum chamber and be supported by magnetic bearings. The flywheel shaft(s) are typically connected to one or more axial mounted motor generators, and the system further typically comprises a storage battery and control processor. The system handles a variety of different and not always stable input power sources, and converts this to continuous, efficient and stable electrical power. The system can handle a variety of clients, such as buildings, electric vehicles, and the like, and can operate under a variety of challenging conditions. 1. An energy management device comprising:at least one rotary flywheel electric energy management device comprising two shafts;each said shaft comprising a smaller circumference end and a larger circumference end;each said smaller circumference ends being suspended on low friction magnetic bearings;said two shafts configured to join together at their larger circumference ends to form at least one cavity that encases a flywheel mass;said flywheel mass comprising a plurality of permanent magnets arranged in any of an axial or radial configuration;said shafts further surrounded by at least one stator comprising a plurality of magnetic pickup coils arranged and electrically connected in a stator configuration, said at least one stator configured so that said shafts can rotate freely within said at least one stator;said magnetic pickup coils and said at least one stator configured so that when said flywheel mass rotates, changing magnetic fields from said plurality of permanent magnets causes electrical current to flow within ...

BREAKER FAILURE PROTECTION USING REVERSE ACTIVE POWER AND NEGATIVE REACTIVE POWER ELEMENT

A generator system includes a generator including terminals, a generator circuit breaker coupled to the terminals and that couples and decouples the generator from a power grid, multiple sensors, and a controller that operates the generator system. The controller determines whether an active power is less than a reverse active power threshold and whether one or more turbine valves are closed, and determines that a breaker failure has occurred based on the active power being less than the reverse active power threshold and the one or more turbine valves being closed. If the active power remains less than the reverse active power and the turbine valves remain closed after a threshold time period after the trip command, and if a reactive power is less than a reverse reactive power threshold, then a breaker failure has occurred. In response, the controller may transmit another trip command to the generator circuit breaker to initiate the breaker failure protection. 1. A generator system , comprising:a generator comprising terminals;a generator circuit breaker coupled to the terminals and configured to selectively couple and decouple the generator from a power grid;a plurality of sensors; and determining whether the active power is less than a reverse active power threshold;', 'determining whether one or more turbine valves of the generator are closed;', 'determining that a breaker failure has occurred based at least in part on the active power being less than the reverse active power threshold and the one or more turbine valves being closed; and', 'transmitting a trip command to the generator circuit breaker and a field circuit breaker in response to determining that the breaker failure has occurred, wherein the field circuit breaker is disposed between the generator circuit breaker and before a load that is powered by the generator., 'a controller configured to receive a plurality of signals from the sensors, wherein the plurality of signals indicate a reverse active ...

SUPERCONDUCTING MACHINE AND METHOD FOR THE OPERATION THEREOF

A superconducting machine is disclosed, in particular for use as a generator in a stand-alone power system. In at least one embodiment, the superconducting machine includes a stator and a rotor capable of rotating with respect to the stator. At least one superconducting coil for generating at least two magnetic poles is provided on at least one component part, in particular the rotor, which superconducting coil is cooled via a cooling device; and at least two parallel winding elements are provided on the respective other component part, in particular the stator, in the armature winding for each phase, which winding elements can be connected either in series or in parallel via at least one switching device. 1. A superconducting machine , comprising:a stator; and 'wherein on one of the stator and rotor, at least one superconducting coil for generating at least two magnetic poles is provided, said at least one superconducting coil being cooled by a cooling device, and wherein on the respective other of the stator and rotor, at least two parallel-running winding elements, connectable either in series or in parallel via at least one switching device, are provided in an armature winding for each phase.', 'a rotor capable of rotating with respect to the stator,'}2. The superconducting machine as claimed in claim 1 , wherein an even number of parallel winding elements is provided for each phase.3. The superconducting machine of claim 1 , further comprising:a control device, configured to implement two operating modes, said control device being designed to set the at least one switching device to parallel connection of the winding elements for a normal operating mode, designed to set the at least one switching device to series connection of the winding elements and designed to set an excitation device for the superconducting coil to reduce an excitation current for an emergency operating mode.4. The superconducting machine of claim 3 , wherein the control device is designed ...

MODIFIED HALBACH ARRAY GENERATOR

A generator is described that includes a first ring comprising a first array of magnets and a second ring comprising a second array of magnets that interact to provide a flux field, which in turn interacts with a coil to generate an electrical current. The magnets in the first and second array of magnets are potted in a polymer-based material. 1. A generator with polymer potted magnets and coils , comprising:a first array of the polymer potted magnets, disposed in a first ring;a second array of the polymer potted magnets, disposed in a second ring, and separated from the first ring by a gap; anda coil disposed within the gap such that relative movement of the coil to at least one of the first and second rings generates an electric current.2. The generator of claim 1 , wherein the coil is potted in a coil shoe having a cooling hole.3. The generator of claim 1 , further comprising an actuator configured to adjust a gap between the first and second rings.4. The generator of claim 1 , wherein the coil is in a fixed position claim 1 , and the first ring and the second ring are configured to rotate relative to the coil.5. The generator of claim 1 , wherein the gap has an air gap having a minimum distance of at least 3% of a maximum thickness of the coil.6. The generator of claim 2 , wherein the coil is a polymer potted coil.7. The generator of claim 1 , wherein the first and second array of polymer potted magnets comprise rare earth materials.8. The generator of claim 1 , wherein the first ring has at least 10 times as many of the polymer potted magnets as the second ring.9. The generator of claim 1 , further comprising second claim 1 , third and fourth coils claim 1 , each of which is disposed between the first and second rings.10. The generator of claim 9 , further comprising a controller that configures the first claim 9 , second claim 9 , third and fourth coils in different series and parallel configurations to control amperage and voltage output.11. The generator of ...

CARBON MONOXIDE SHUTOFF SYSTEM FOR ELECTRIC GENERATOR

A carbon monoxide shutoff system for an engine of a portable electrical generator has a carbon monoxide gas sensor, a microcontroller, and an output indicator. The carbon monoxide gas sensor generates an output electrical current proportional to a detected concentration of ambient carbon monoxide. The microcontroller has an input connected to the carbon monoxide gas sensor, and an output connected to an operational control of the engine. A deactivation signal generated by the microcontroller in response to detection of a deactivation condition is based upon the output electrical current from the carbon monoxide gas sensor matching predefined value and duration thresholds. The deactivation signal is operative to stop the engine. 125-. (canceled)26. A carbon monoxide shutoff system for an engine of a portable electrical generator , the system comprising:a carbon monoxide gas sensor generating an output electrical current proportional to a detected concentration of ambient carbon monoxide;a microcontroller with an input connected to the carbon monoxide gas sensor, and an output connected to an operational control of the engine, a deactivation signal generated by the microcontroller from the output thereof in response to detection of a deactivation condition based upon the output electrical current from the carbon monoxide gas sensor matching predefined value and duration thresholds corresponding to excess ambient carbon monoxide or sensor tampering, the deactivation signal being operative to stop the engine; andan output indicator connected to the microcontroller, a deactivation notification sequence being generated on the output indicator in response to the detection of the deactivation condition.27. The carbon monoxide shutoff system of claim 26 , wherein the operational control of the engine is an ignition coil claim 26 , the deactivation signal being operative to cut an ignition electrical signal to the ignition coil.28. The carbon monoxide shutoff system of claim ...

SYSTEM FOR AND METHOD OF FREQUENCY CONTROL OF VARIABLE-SPEED WIND POWER GENERATOR

A system for and a method of frequency control of a variable-speed wind power generator are proposed. According to an implementation example of the present technology, there is an advantage in which the present technology may be involved in a frequency control of the system, thereby stabilizing the frequency of the system by controlling the frequency of the variable-speed wind power generator on the basis of a gain being varied according to a speed of a rotor. 1. A system for frequency control of a variable-speed wind power generator , the generator comprising a rotor , a maximum output control loop , and a frequency deviation loop , the system comprising:a maximum output control loop unit calculating output of the maximum output control loop according to a speed of the rotor;a frequency deviation loop unit calculating output of the frequency deviation loop based on a gain that changes according to a frequency deviation of the system and the speed of the rotor; anda controller calculating a reference output of the variable-speed wind power generator as the sum of the output of the maximum output control loop and the output of the frequency deviation loop and controlling a converter controller on the rotor side based on an output limit range and the reference output of the variable-speed wind power generator,wherein the gain is calculated based on the output calculated from the maximum output control loop, the output calculated from the frequency deviation loop, and a predetermined speed of the rotor.3. A method of frequency control of a variable-speed wind power generator , the generator comprising a rotor , a maximum output control loop , and a frequency deviation loop , the method comprising:calculating output of the maximum output control loop according to a speed of the rotor by a maximum output control loop unit;calculating output of the frequency deviation loop based on a gain that changes according to a frequency deviation of the system and the speed of the ...

RESONANT COMMUTATION SYSTEM FOR EXCITING A THREE-PHASE ALTERNATOR

An alternator has a field coil that produces a magnetic field which induces electricity in a coil arrangement. A field coil excitation system includes a generator with an output coil assembly for producing alternating electricity. A rectifier converts the alternating electricity into voltage and direct current at two nodes. A capacitor, between the nodes, has capacitance that forms a resonant circuit with inductance of the output coil assembly. Due to that resonant circuit, the voltage and direct current oscillate in a predefined phase relationship. A switch and the field coil are connected in series between the nodes. A controller renders the switch conductive for a time period specified by a received control signal. The switch is rendered non-conductive at the first occurrence of a minimum current level after the time period ends. The predefined phase relationship enables the minimum current level to be detected by sensing the voltage.

Hydropower plant for controlling grid frequency and method of operating same

A hydropower plant for regulating the frequency of an electric grid has an upper water reservoir; a lower water reservoir; a waterway that connects the upper water reservoir with the lower water reservoir. A turbine that is arranged in the waterway includes a runner, a guide vane apparatus and a device for blowing out the runner space. An electric synchronous machine is mechanically connected to the turbine and a frequency converter is electrically connected to the synchronous machine. A mains transformer is electrically connected to the frequency converter and the mains grid. A resistor is connected in a DC intermediate circuit of the frequency converter in such a way that it may connect the line sections of the DC intermediate circuit to one another. The assembly also includes a device for cooling the resistor.

HYDROPOWER PLANT FOR CONTROLLING GRID FREQUENCY AND METHOD OF OPERATING SAME

A hydropower plant for regulating the frequency of an electric grid has an upper water reservoir, a lower water reservoir, and a waterway that connects the upper water reservoir to the lower water reservoir. A turbine is arranged in the waterway and includes a runner, a guide vane apparatus and a device for blowing out the runner space. An electric double-fed asynchronous machine is mechanically connected to the turbine and a frequency converter is electrically connected to the asynchronous machine. A mains transformer is electrically connected to the asynchronous machine, frequency converter and mains grid. A resistor is arranged in a DC intermediate circuit of the frequency converter in such a way that it may connect the line sections of the DC intermediate circuit to one another. There is also provided a device for cooling the resistor. 112-. (canceled)13. A hydropower plant for regulating the frequency of an electric grid , the hydropower plant comprising:an upper water reservoir and a lower water reservoir, wherein a water level of the upper water reservoir lies above a water level of the lower water reservoir;a waterway connecting the upper water reservoir with the lower water reservoir;a turbine arranged in the waterway, the turbine including a runner, a guide vane apparatus and a device for blowing out a runner space;an electric double-fed asynchronous machine mechanically connected to the turbine, the double-fed asynchronous machine including a rotor and a stator;a frequency converter electrically connected to the rotor of the double-fed asynchronous machine, the frequency converter having a DC intermediate circuit;a mains transformer electrically connected to the frequency converter, to the stator of the double-fed asynchronous machine and to the mains grid;a resistor arranged in the DC intermediate circuit of the frequency converter and configured to connect line sections of the DC intermediate circuit to one another; anda device for cooling the resistor. ...

Engine starting system using stored energy

There is described a method for and system for starting at least one engine from a twin engine installation. The starting system comprises a first engine arrangement comprising a first electric machine having a single rotor dual stator configuration, a first dual channel power control unit coupled to the first electric machine, and a first dual channel full authority digital engine control (FADEC) coupled to the first dual channel power control unit; a second engine arrangement comprising a second electric machine having a single rotor dual stator configuration, a second dual channel power control unit coupled to the second electric machine, and a second dual channel full authority digital engine control (FADEC) coupled to the second dual channel power control unit; an energy storage unit coupled to the first engine arrangement and the second engine arrangement and having at least a first super-capacitor and a second super-capacitor; and a DC to DC converter configured to receive a first voltage level from a power source, increase the first voltage level to a second voltage level, and charge the first super-capacitor and the second super-capacitor to the second voltage level.