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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 9839. Отображено 100.

05-01-2012 дата публикации

Rotary electric machine improved to carry out load-dump protection

Номер: US20120001598A1

Автор: Harumi Horihata, Hideaki Nakayama, Yoshihide ITOH

Принадлежит: Denso Corp

In a rotary electric machine, a load-dump protector turns on a switching element as a low-side rectifying element for at least one of plural-phase stator windings when the output voltage exceeds a first threshold voltage due to load dump. The load dump protector determines a turnoff timing of the switching element as the low-side rectifying element for the at least one of the plural-phase stator windings after the output voltage, which exceeded the first threshold voltage once, falls below a second threshold voltage. The second threshold voltage is set to be lower than the first threshold voltage. The load dump protector turns off, at the determined turnoff timing, the switching element as the low-side rectifying element for the at least one of the at least two-phase stator windings.

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Номер записи: 1

25-02-2019 дата публикации

Устройство стабилизации напряжения с инвертором для подвижного состава

Номер: RU0000187219U1

Автор: Валерий Павлович Климов, Петр Николаевич Акимов, Юрий Анатольевич Карпиленко

Принадлежит: Акционерное общество "Электромаш"

Полезная модель относится к области энергетики и электротехники, в частности к устройствам для преобразования электромеханической энергии в электрическую, и может быть использовано в качестве источника электроснабжения в системах электропитания автономных электроэнергетических комплексах. Перспективным направлением является разработка и внедрение энергетических установок на основе системы автономного электроснабжения (САЭ) с генераторно-приводной установкой от оси колесной пары тележки подвижного состава. Поставленный технический результат достигается тем, что напряжение синхронного генератора (СГ) нестабильной частоты поступает на вход инверторного преобразователя частоты (ПЧ), выход которого через фильтр высших гармоник (ФВГ) питает стабильным напряжением блок коммутации нагрузок (БКН) (рефрижераторов). Синхронность работы генератора на общей шине переменного тока и покрытие пиковых потреблений мощности обеспечивается за счет аккумуляторной батареи (АБ), подключенной к блоку питания собственных нужд (БПСН). При накоплении излишней генерируемой энергии через зарядное устройство (ЗУ) происходит подзаряд аккумулятора. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 187 219 U1 (51) МПК H02M 5/40 (2006.01) H02P 9/04 (2006.01) B61D 43/00 (2006.01) H02K 35/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК H02M 5/40 (2006.01); H02P 9/04 (2006.01); B61D 43/00 (2006.01); H02K 35/00 (2006.01) (21)(22) Заявка: 2018120690, 05.06.2018 (24) Дата начала отсчета срока действия патента: Дата регистрации: (73) Патентообладатель(и): Акционерное общество "Электромаш" (RU) 25.02.2019 (56) Список документов, цитированных в отчете о поиске: RU 2340071 C1, 27.11.2008. RU (45) Опубликовано: 25.02.2019 Бюл. № 6 1 8 7 2 1 9 R U (54) УСТРОЙСТВО СТАБИЛИЗАЦИИ НАПРЯЖЕНИЯ С ИНВЕРТОРОМ ДЛЯ ПОДВИЖНОГО СОСТАВА (57) Реферат: Полезная модель относится к области генератора (СГ) нестабильной частоты поступает энергетики и электротехники, в ...

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Номер записи: 2

13-03-2019 дата публикации

Турбодетандерная электрогенераторная установка

Номер: RU0000187613U1

Автор: Александр Борисович Федотов, Виталий Михайлович Иванов, Георгий Анатольевич Фокин, Николай Алексеевич Забелин

Принадлежит: Общество с ограниченной ответственностью "Газпром трансгаз Санкт-Петербург"

Полезная модель относится к газовой промышленности, а именно к системам электроснабжения газораспределительных станций (ГРС) для снижения давления магистрального природного газа с 5,5 МПа до 0,3÷1,2 МПа. Задачей полезной модели является упрощение конструкции установки с целью возможности ее обслуживания и ремонта непосредственно в цехе редуцирования газа при обеспечении низкой ее стоимости при производстве. Поставленная задача решается турбодетандерной генераторной установкой, содержащей помещенные в герметичную камеру высокого давления, в нижней части которой выполнены входной и выходной патрубки и заведены в ее полость электроды для подключения нагрузки, электрогенератор, на валу которого установлен ротор турбины, и радиальную газовую турбину, состоящую из статора кольцевой формы, внутри которого в рабочем положении располагается ротор, на лопатки которого направлены струи газа, вращающие ротор и вал электрогенератора, отличающийся тем, что камера высокого давления образована установленной на металлических опорах стальной станиной и сферической заглушкой с фланцем, стянутых между собой резьбовыми шпильками, а в качестве электрогенератора используется автомобильный бесщеточный электрогенератор постоянного тока напряжением 24 В и мощностью до 3 кВт. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 187 613 U1 (51) МПК F01D 15/10 (2006.01) H02P 9/04 (2006.01) H02K 15/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК F01D 15/10 (2018.08); H02P 9/04 (2018.08); F01D 1/34 (2018.08) (21)(22) Заявка: 2018127766, 27.07.2018 (24) Дата начала отсчета срока действия патента: Дата регистрации: 13.03.2019 (56) Список документов, цитированных в отчете о поиске: RU 2564173 C2, 27.09.2015. SU (45) Опубликовано: 13.03.2019 Бюл. № 8 1 8 7 6 1 3 R U 465521 A1, 30.03.1975. RU 38802 U1, 10.07.2004. RU 2047059 C1, 27.10.1995. RU 2403406 C1, 10.11.2010. US 5685154 A1, 11.11.1997. DE 2345689 A, 28.03.1974. US 4555637 A1, 26.11.1985. US ...

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Номер записи: 3

21-03-2019 дата публикации

Устройство электроснабжения с приводным двигателем

Номер: RU0000187868U1

Автор: Александр Николаевич Гусев, Владимир Иванович Полянский, Никита Сергеевич Гончаров, Николай Петрович Кириллов, Сергей Николаевич Слепов

Принадлежит: Акционерное общество "Корпорация "Стратегические пункты управления" АО "Корпорация "СПУ - ЦКБ ТМ"

Полезная модель относится к области электротехники и может быть использована в качестве устройства электроснабжения объектов постоянным и переменным током при наличии приводного двигателя.Устройство содержит приводной двигатель с валом, первый синхронный генератор с постоянными магнитами, выпрямитель, имеющий первый выход и второй выход, и сглаживающий конденсатор, бесконтактный двигатель постоянного тока, содержащей инвертор, синхронный двигатель, датчик положения ротора и формирователь импульсов, причем указанный двигатель снабжен первым валом и вторым валом, второй синхронный генератор с постоянными магнитами, потребители постоянного и переменного тока, причем вал приводного двигателя с валом первого синхронного генератора, к статорной обмотке которого подключен выпрямитель, первый выход которого подключен к потребителю постоянного тока, а второй выход - к инвертору бесконтактного двигателя постоянного тока, выход которого подключен к обмоткам синхронного двигателя, первый вал которого соединен с валом второго синхронного генератора с постоянными магнитами, а второй вал - к датчику положения ротора, импульсы которого поступают в формирователь импульсов, соединенный со схемой управления инвертором, а к статорной обмотке второго синхронного генератора с постоянными магнитами подключен потребитель переменного тока, причем сглаживающий конденсатор выпрямителя включен параллельно инвертору. Требуемый результат может достигать около 20 процентов. 1 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 187 868 U1 (51) МПК B60R 16/023 (2006.01) H02M 5/40 (2006.01) H02P 9/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК B60R 16/023 (2006.01); H02M 5/40 (2006.01); H02P 9/00 (2006.01) (21)(22) Заявка: 2018108605, 12.03.2018 (24) Дата начала отсчета срока действия патента: Дата регистрации: 21.03.2019 (45) Опубликовано: 21.03.2019 Бюл. № 9 1 8 7 8 6 8 R U (56) Список документов, цитированных в отчете о поиске: SU 692032 ...

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Номер записи: 4

12-09-2019 дата публикации

Автономный электроагрегат

Номер: RU0000192315U1

Автор: Владимир Вячеславович Ларкин, Евгений Витальевич Пономарёв, Игорь Андреевич Иванов, Юрий Викторович Воронов

Принадлежит: ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ КАЗЕННОЕ ВОЕННОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ Военная академия Ракетных войск стратегического назначения имени Петра Великого МИНИСТЕРСТВА ОБОРОНЫ РОССИЙСКОЙ ФЕДЕРАЦИИ

Задачей полезной модели является уменьшение механических потерь при работе одного двигателя и увеличение его КПД.Автономный электроагрегат, содержащий два трехфазных синхронных генератора 9 и 13, две однотипные электронно-управляемые муфты 6, 7 и электронно-управляемую муфту 11, дизельные двигатели 1 и 2, систему управления 5, симметричный дифференциал с электронно-управляемым механизмом блокировки 8, датчики угловой скорости 3, 4 и 12, а также шину питания переменного тока 10, обеспечивает уменьшение удельного расхода топлива и увеличение времени автономной работы электроагрегата от одной заправки топливом, а также уменьшение механических потерь при работе одного двигателя и увеличение его КПД. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 192 315 U1 (51) МПК F02B 63/04 (2006.01) F02D 29/06 (2006.01) H02P 9/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК F02B 63/04 (2019.02); F02D 29/06 (2019.02); H02P 9/04 (2019.02) 24.12.2018 Дата регистрации: 12.09.2019 Приоритет(ы): (22) Дата подачи заявки: 24.12.2018 (45) Опубликовано: 12.09.2019 Бюл. № 26 (54) АВТОНОМНЫЙ ЭЛЕКТРОАГРЕГАТ (57) Реферат: Задачей полезной модели является уменьшение механических потерь при работе одного двигателя и увеличение его КПД. Автономный электроагрегат, содержащий два трехфазных синхронных генератора 9 и 13, две однотипные электронно-управляемые муфты 6, 7 и электронно-управляемую муфту 11, дизельные двигатели 1 и 2, систему управления 5, симметричный дифференциал с электронно- R U 1 9 2 3 1 5 U 1 Адрес для переписки: 142210, Московская обл., г. Серпухов, ул. Бригадная, 17, ФВА РВСН им. Петра Великого Стр.: 1 (73) Патентообладатель(и): ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ КАЗЕННОЕ ВОЕННОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ Военная академия Ракетных войск стратегического назначения имени Петра Великого МИНИСТЕРСТВА ОБОРОНЫ РОССИЙСКОЙ ФЕДЕРАЦИИ (RU) (56) Список документов, цитированных в отчете о поиске: RU 178735 U1, 18.04.2018. ...

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Номер записи: 5

24-03-2021 дата публикации

Автономный источник электроэнергии постоянного тока

Номер: RU0000203152U1

Автор: Андрей Иванович Пономаренко, Виктор Степанович Сидоров

Принадлежит: Акционерное общество "Электроавтоматика"

Полезная модель относится к области электротехники и может быть использована в качестве автономного источника постоянного тока в системах электроснабжения подвижных объектов связи и управления. Автономный источник электроэнергии постоянного тока содержит двигатель внутреннего сгорания, генератор постоянного тока, блок регулирования напряжения, блок регулирования подачи топлива, при этом вход блока регулирования подачи топлива подключен к выходу блока регулирования напряжения, который состоит из устройства сравнения и устройства усиления сигнала рассогласования между заданным и действительным значениями выходного напряжения генератора. Технический результат заключается в повышении точности регулирования частоты вращения вала двигателя в соответствии с реальной токоскоростной характеристикой генератора, улучшении и повышении надежности конструкции. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 203 152 U1 (51) МПК H02P 9/44 (2006.01) H02P 9/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК H02P 9/44 (2020.08); H02P 9/04 (2020.08) (21)(22) Заявка: 2020123632, 09.07.2020 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Акционерное общество "Электроавтоматика" (RU) Дата регистрации: 24.03.2021 (56) Список документов, цитированных в отчете о поиске: RU 178096 U1, 23.03.2018. RU 2319277 C1, 10.03.2008. SU 892432 A1, 23.12.1981. US 6166512 A1, 26.12.2000. (45) Опубликовано: 24.03.2021 Бюл. № 9 2 0 3 1 5 2 R U (54) АВТОНОМНЫЙ ИСТОЧНИК ЭЛЕКТРОЭНЕРГИИ ПОСТОЯННОГО ТОКА (57) Реферат: Полезная модель относится к области регулирования напряжения, который состоит из электротехники и может быть использована в устройства сравнения и устройства усиления качестве автономного источника постоянного сигнала рассогласования между заданным и тока в системах электроснабжения подвижных действительным значениями выходного объектов связи и управления. Автономный напряжения генератора. Технический результат ...

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Номер записи: 6

26-01-2012 дата публикации

Generator set calibration controller

Номер: US20120019000A1

Автор: Keith Ronald Folken, Matthew Joseph Meinhart, Michael Allen Dvorsky

Принадлежит: Caterpillar Inc

A calibration system for a generator set controller is disclosed. The calibration system may have a source of electric power, a controller in communication with the source and configured to monitor a parameter of the electric power and produce at least one output corresponding to the monitored parameter, and a power meter configured to measure the parameter of the electric power. The calibration system may also have a processor in communication with the source of electric power, the controller, and the power meter. The processor may be configured to direct electric power having a first test voltage from the source to the controller, and directly relate a value of the at least one output corresponding to the first test voltage and a value of the measured parameter to an offset error.

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Номер записи: 7

02-02-2012 дата публикации

System and methods for controlling the amplitude modulation of noise generated by wind turbines

Номер: US20120025530A1

Автор: Benoit Petitjean, Kevin Wayne Kinzie, Thomas Joseph Fischetti

Принадлежит: General Electric Co

In one aspect, a method for controlling the amplitude modulation of the noise generated by wind turbines is disclosed. The method may include determining a rotor position of a first wind turbine, determining a rotor position of a second wind turbine, determining if the first and second wind turbines are operating in-phase and, in the event that the first and second wind turbines are operating in-phase, adjusting an operating condition of at least one of the first wind turbine and the second wind turbine so that the first and second wind turbines operate out-of-phase.

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Номер записи: 8

08-03-2012 дата публикации

Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange

Номер: US20120055147A1

Автор: Danielle A. FONG, Edwin P. Berlin, Jr., Stephen E. Crane

Принадлежит: LightSail Energy Inc

A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.

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Номер записи: 9

08-03-2012 дата публикации

Method and device for decelerating an underwater power station

Номер: US20120056424A1

Автор: Benjamin Holstein, Klaus Krüger, Michael Hölle, Norman Perner

Принадлежит: VOITH PATENT GMBH

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.

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Номер записи: 10

08-03-2012 дата публикации

Fuel Efficient Crane System

Номер: US20120059555A1

Автор: Marcelo Andres Lara, Paul S. Bixel

Принадлежит: TMEIC Corp

A system and method for efficiently regulating the fuel consumption of a variable speed combustion engine used to control loads such as a hoist motor in a mobile gantry crane based on load motor speed commands issued by a crane operator. The system and method can rely on a programmable logic controller to issue engine fuel commands to regulate engine speed based on interpolations derived from data representing the relationship between load motor voltage and engine speed and data representing the relationship between engine speed and engine power capacity. The method may also be used in modified form by combustion engines which need digital fixed speed commands.

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Номер записи: 11

15-03-2012 дата публикации

Blade pitch control system, wind turbine generator, and blade pitch control method

Номер: US20120061962A1

Автор: Momoe Nagasaki

Принадлежит: Mitsubishi Heavy Industries Ltd

A wind turbine generator generates power through rotation of a rotor to which a plurality of blades are pivotally coupled and includes a pitch-angle control section that outputs a pitch-angle command value that indicates the amount of change in the pitch angle of each of the blades, hydraulic cylinders each of which changes the pitch angle of the corresponding blade based on the corresponding pitch-angle command value output from the pitch-angle control section, and load measurement sections that measure blade-root loads. A set value indicating that wind received by the wind turbine generator has a biased wind speed distribution is set in advance in the pitch-angle control section. Only when a calculated pitch-angle command value exceeds the set value, the pitch-angle control section outputs a pitch-angle command value beyond pitch command limit values. Therefore, in the wind turbine generator, a higher load than necessary is not imposed on a drive unit for the pitch angle of each of the blades in a case of a normal wind speed or a wind speed distribution caused by the normal wind speed, and the blade-root load can be sufficiently reduced even in a case of a wind speed distribution that occurs when a strong wind is received.

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Номер записи: 12

15-03-2012 дата публикации

Wind power generation control device and wind power generation control method

Номер: US20120061966A1

Автор: Hikaru Matsumiya, Ryosuke Ito, Tadaaki Chikashige, Takanori Okubo, Takashi Yamazaki

Принадлежит: Zephyr Corp Japan

A wind power generation control device which controls a wind power generator using a wind turbine blade having a fixed pitch angle is provided. The wind power generation control device which controls the wind power generator in which an output current value outputted by the wind power generator is detected, an output voltage value outputted by the wind power generator is detected, a rotational speed of the wind turbine blade is detected, and on the basis of the detected output current value at the current time, the detected output voltage value at the current time, and the detected rotational speed at the current time, output power at the rotational speed at the current time is calculated, and on the basis of the calculated output power and blade aerodynamic properties, which are properties inherent to the wind turbine blade, the wind power generator is controlled so that an optimal amount of power corresponding to the wind speed can be efficiently obtained in a relatively low wind speed region and a wind power generation control method for controlling the wind power generator are provided.

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Номер записи: 13

29-03-2012 дата публикации

Power supply device

Номер: US20120074897A1

Автор: Toru DAIGO

Принадлежит: Mitsubishi Electric Corp

A power supply device capable of switching over semiconductor switches of a synchronous rectification means so as to efficiently charge up a battery in response to its charging status is provided. The device includes a switch control means for controlling the semiconductor switches in response to the battery charging status; a negative voltage detection means for detecting a negative voltage at each phase of three-phase AC voltages; and a voltage detection means for detecting the battery voltage being higher than a predetermined voltage, wherein when the negative voltage or the battery voltage higher than the predetermined voltage is detected, the switch control means controls the semiconductor switches. The device further includes an abnormality detection means for monitoring the negative voltage detected by the negative voltage detection means and thereby detecting an abnormality in at least one of the three phases, and when an abnormality is detected, the switch control means controls the semiconductor switch corresponding to the phase of the abnormality.

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Номер записи: 14

29-03-2012 дата публикации

Inverter generator

Номер: US20120074912A1

Автор: Masao Namai, Shinichi Azuma, Shinji Hibi, Takashi Abe, Toru Yoshioka, Yukio Karasawa

Принадлежит: Sawafuji Electric Co Ltd, Yanmar Co Ltd

A control circuit (microcomputer) is provided in each of two inverter portions. Magnitude of a target waveform signal corresponding to a voltage to be output by each of the inverter portions is varied according to an operation state. The number of revolution of the engine is adjusted according to the larger one of the effective powers output from the two inverter portions. To cope with a temporary output shortage from the AC generator, the output voltage is temporarily lowered and then the output voltage is restored after waiting for the number of revolution of the engine increases.

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Номер записи: 15

19-04-2012 дата публикации

Systems and methods for providing ac power from multiple turbine engine spools

Номер: US20120091716A1

Автор: Farhad Nozari, Richard A. Cote

Принадлежит: Boeing Co

Systems and methods for providing AC power from multiple turbine engine spools are disclosed. An aircraft system in a particular embodiment includes an engine having a first shaft connected and a second shaft. The aircraft system can further include a bus system and a first energy converter including a starter/generator, coupled between the first shaft and the bus system to convert a first variable frequency energy transmitted by the first shaft to a first generally constant frequency energy. A second energy converter can be coupled between the second shaft and the bus system, with the second energy converter including a generator to convert a second variable frequency energy transmitted by the second shaft to a second generally constant frequency energy.

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Номер записи: 16

26-04-2012 дата публикации

Plasma and Induction Heating Power Supply Systems and Related Methods

Номер: US20120101642A1

Автор: Holger Raschke, Reinhard Schaefer, Richard Gottschalk, Thomas Pohl, Ulrich Heller

Принадлежит: Huettinger Elektronik GmbH and Co KG

In some aspects, a power supply system for a plasma application and/or an induction heating system includes at least two controllable power generators of different types. Each controllable power generator includes an associated identifier, and at least one operating unit for controlling at least one of the power generators, the operating unit includes an operating application to import the respective identifiers from the power generators that are connected to the operating application, and based on generator-specific configuration data that are stored for each power generator and the identifiers, the operating application constructs a graphic user interface on a display device of the operating unit.

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Номер записи: 17

17-05-2012 дата публикации

Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange

Номер: US20120118137A1

Автор: Danielle A. FONG, Edwin P. Berlin, Jr., Stephen E. Crane

Принадлежит: LightSail Energy Inc

A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.

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Номер записи: 18

07-06-2012 дата публикации

Asynchronous generator system and wind turbine having an asynchronous generator system

Номер: US20120139246A1

Автор: Axel Rafoth

Принадлежит: SUZLON ENERGY GMBH

The present invention relates to an asynchronous generator system for a wind turbine, and a wind turbine with such a system, and the method for operating and starting up such a wind turbine. Herein, the asynchronous generator system is developed especially simply and thus cost-effectively and is able to go through wind storms and the increase of rotational speed associated therewith.

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Номер записи: 19

21-06-2012 дата публикации

Polyphasic multi-coil electric device

Номер: US20120153757A1

Автор: Jonathan Ritchey

Принадлежит: Exro Technologies Inc

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.

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Номер записи: 20

12-07-2012 дата публикации

Control of an engine-driven generator to address transients of an electrical power grid connected thereto

Номер: US20120175876A1

Автор: Andrew Kitchen, Bradford K. Palmer, John R. Pendray, Patrick M. Pierz

Принадлежит: Cummins Power Generation IP Inc

A technique for providing electric power to an electric power utility grid includes driving an electric power alternator coupled to the grid with a spark-ignited or direct injection internal combustion engine; detecting a change in electrical loading of the alternator; in response to the change, adjusting parameters of the engine and/or generator to adjust power provided by the engine. In one further forms of this technique, the adjusting of parameters for the engine includes retarding spark timing and/or interrupting the spark ignition; reducing or retarding direct injection timing or fuel amount and/or interrupting the direct injection; and/or the adjusting of parameters for the generator including increasing the field of the alternator or adding an electrical load.

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Номер записи: 21

19-07-2012 дата публикации

Controller-integrated electric rotating machine with a shifted control circuit

Номер: US20120181903A1

Автор: Masaki Kato, Yoshihito Asao

Принадлежит: Mitsubishi Electric Corp

In a controller-integrated electric rotating machine provided with a power circuit unit and a control circuit unit, a cooling property is improved so that the control circuit unit does not impair a flow of air for cooling the power circuit unit. A power circuit unit having switching elements for converting DC power to AC power for supplying the AC power to an electric rotating machine, a control circuit unit for controlling the switching elements of the power circuit unit, and a rotational position detection sensor arranged on a rotating shaft for detecting the rotation of the rotating shaft are provided. The control circuit unit is disposed, when viewed in the direction of the rotating shaft, at a position where the power circuit unit is not disposed and is shifted radially outward so as not to overlap the rotational position detection sensor.

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Номер записи: 22

04-10-2012 дата публикации

Control device of wind turbine generator, wind turbine generator, wind farm, and control method for wind turbine generator

Номер: US20120248772A1

Автор: Akira Yasugi, Tetsuo Shigemizu, Tsuyoshi Wakasa

Принадлежит: Mitsubishi Heavy Industries Ltd

An object is to rapidly recover from a voltage drop in a power grid. When the value of a grid voltage detected by a grid voltage detection unit has fluctuated so as to satisfy a condition set in advance for a reference value, a control device controls a wind turbine generator such that a reactive current corresponding to a required output current that is determined by an active current and the reactive current and that indicates an output level to a power grid on the basis of the detection result from the grid voltage detection unit is output to the power grid.

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Номер записи: 23

18-10-2012 дата публикации

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

Номер: US20120262131A1

Автор: Chun-Yao Lee

Принадлежит: CHUNG YUAN CHRISTIAN UNIVERSITY

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.

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Номер записи: 24

01-11-2012 дата публикации

Controller and variable-speed generator-motor starting method

Номер: US20120274289A1

Автор: Teruyuki Ishizuki

Принадлежит: Toshiba Corp

In one embodiment, there is provided a controller that performs control to supply driving electricity to a secondary winding of a variable-speed generator-motor from a secondary exciter and thereby start the variable-speed generator-motor from a standstill state in a variable-speed pumped storage system. The controller performs control to complete a start-up by the driving electricity from the secondary exciter and connect the variable-speed generator-motor in parallel with an electric power system, in a state where a rotating speed of the variable-speed generator-motor is lower than a lower limit speed of a variable-speed operation range.

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Номер записи: 25

08-11-2012 дата публикации

Generator Frequency Controlled Load Shifting

Номер: US20120280499A1

Автор: Paul Swearingen, Scott J. Marks

Принадлежит: Hamilton Sundstrand Corp

In a power generation system that includes a ram air turbine that drives an electric generator and at least one electric bus that couples alternating current electric power from the electric generator to at least one electric load, a method of maintaining the speed of the ram air turbine within a desired range of speeds that comprises the step of uncoupling the at least one electric bus from the electric generator when the frequency of the alternating current falls under a desired minimum frequency.

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Номер записи: 26

29-11-2012 дата публикации

Turbine generator system

Номер: US20120299300A1

Автор: Chen-Sen Ouyang, Ching-Tai Chiang, Jong-Ian Tsai, Rong-Ching Wu

Принадлежит: I-SHOU UNIVERSITY

A turbine generator system is operable to provide electric power to an electric network connected thereto, and includes a turbine generator apparatus and an output module. The turbine generator apparatus includes a turbine rotor provided with a plurality of blades and rotatable to output a mechanical torque, and a generator coupled to the turbine rotor and to be driven by the mechanical torque to generate driving electric power having a system frequency. The output module is electrically connected to the turbine generator apparatus for converting the driving electric power into output electric power to be provided to the electric network. The generator includes a mechanical filter that is operable, when the turbine generator system has a fault, to resonate in a specified frequency that is based on the system frequency to make the blades of the turbine rotor less sensitive to electromagnetic torque disturbance attributed to the fault.

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Номер записи: 27

06-12-2012 дата публикации

Electricity Generation Device and Permanent-Magnet Electric Generator

Номер: US20120306462A1

Автор: Hitoshi Oyori, Yukio Shimomura

Принадлежит: IHI Aerospace Co Ltd, Sinfonia Technology Co Ltd

An electricity generation device includes a permanent-magnet electric generator with three or more phase windings each having an output terminal and connected to a neutral point, and bidirectional semiconductor switching circuits capable of interrupting connections between the respective phase windings and the neutral point. Each switching circuit allows current to flow in both directions. A gate signal generation circuit outputs to one of the switching circuits during a period including the time at which the AC voltage excited in the corresponding phase winding turns from positive to negative and during a period including the time at which the AC voltage excited in the corresponding phase winding turns from negative to positive. A startup gate signal output circuit outputs a startup gate signal to all of the bidirectional semiconductor switching circuits when the permanent-magnet electric generator is to be started.

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Номер записи: 28

10-01-2013 дата публикации

Control system for doubly-fed induction machine

Номер: US20130009610A1

Автор: Jouko Niiranen, Reijo Virtanen, Slavomir Seman

Принадлежит: ABB Oy

A method and arrangement for controlling a doubly-fed induction machine by a frequency converter including a rotor side converter (INU) connected to a rotor circuit of a doubly-fed induction machine (DFIG) and having a control system with rotor flux as a feedback variable, a grid side converter (ISU) connected to an AC power network, and a direct voltage intermediate circuit (DC) connected between the rotor side converter (INU) and the grid side converter (ISU). The method includes forming a rotor flux reference (ψ r,ref ), forming a damping signal (ψ ref,D ), summing the damping signal and the rotor flux reference for obtaining a modified rotor flux reference (ψ ref ), and feeding the modified rotor flux reference to a controller of the rotor side converter (INU) for damping sub-synchronous resonances.

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Номер записи: 29

07-03-2013 дата публикации

Ac electrical power regulatory system

Номер: US20130057235A1

Автор: Claudio Zizzo

Принадлежит: Rolls Royce PLC

A system is provided for regulating AC electrical power delivered from a source to a load. The system has a voltage regulating device which, in use, is connected at an input side thereof to the source and at an output side thereof to the load. The voltage regulating device is controllable to vary the ratio of voltage amplitudes at the input side and the output side. The system further has a measuring arrangement for measuring the voltage amplitude and the voltage frequency at the input side. The system further has a control device for determining a desired ratio of the voltage amplitudes depending on the measured voltage amplitude and the measured voltage frequency. The control device is adapted to issue an output command to the voltage regulating device, the output command controlling the voltage regulating device to provide the voltage amplitude ratio determined by the control device.

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Номер записи: 30

14-03-2013 дата публикации

METHOD, APPARATUS, SIGNALS AND MEDIA, FOR SELECTING OPERATING CONDITIONS OF A GENSET

Номер: US20130066503A1

Автор: Bouchon Nicolas Louis, Liu Wei

Принадлежит: AZURE DYNAMICS, INC.

An apparatus for selecting operating conditions of a genset, the apparatus including a processor circuit configured to select a set of operating points from a plurality of operating points of the genset each comprising an engine speed in a generator electrical output value and a plurality of cost values associated with operating the genset at respective operating points such that the sum of the cost values associated with the operating points in said set is minimized and such that the engine speed increases or decreases monotonically with monotonically increasing or decreasing electrical power output values. 1. An apparatus for selecting operating conditions of a genset including a engine coupled to an electrical power generator , the apparatus comprising:a processor circuit configured to select a set of operating points from a plurality of operating points of the genset each comprising an engine speed value and a generator electrical power value such that a sum of cost values associated with the operating points in said set is minimized and such that the engine speed increases or decreases monotonically with monotonically increasing or decreasing electrical power output values.2. The apparatus of wherein said processor circuit is operably configured to assign a weight to each of the power output values such that cost values corresponding to more frequently demanded power outputs are assigned a greater weight in said sum of cost values than cost values corresponding to less frequently demanded electrical power output values.3. The apparatus of wherein said processor circuit is operably configured to assign greater weight to electrical power output values proximate a midpoint of a range of power outputs that the generator is capable of supplying.4. The apparatus of wherein said processor circuit is operably configured to generate a record of received demands for power outputs during operation of the genset over a period of time and to assign greater weight to more ...

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Номер записи: 31

28-03-2013 дата публикации

Leisure vehicle

Номер: US20130076034A1

Автор: Yoshimoto Matsuda

Принадлежит: Individual

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.

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Номер записи: 32

28-03-2013 дата публикации

METHOD AND CONTROL ARRANGEMENT FOR CONTROLLING CENTRAL CAPACITORS IN WIND POWER PLANTS

Номер: US20130076037A1

Автор: Garcia Jorge Martinez

Принадлежит: VESTAS WIND SYSTEMS A/S

The present invention relates to a control system and an associated method for controlling an amount of reactive power delivered from a wind power plant to an associated power supply grid, the control system comprising a wind power plant controller and a number of wind turbine controllers each being in communication with said wind power plant controller, wherein the wind power plant controller is adapted to provide a grid voltage reference in response to a required total amount of reactive power to at least one wind turbine controller and operating a Switched Capacitor bank. 1. A method for controlling at least one capacitor or reactor in a wind power plant , the wind power plant comprising at least one wind turbine generator , the method comprising:calculating a reactive power value based on an electrical grid reference value;defining at least one maximum reactive power operation range of at least one power converter in the wind power plant;connecting or disconnecting the at least one capacitor or reactor when a reactive power value is outside the at least one reactive power operation range;subtracting the reactive power of the connected capacitor or reactor from the total calculated reactive power value; anddispatching a wind turbine generator voltage reference to the at least one wind turbine based on the subtraction.2. The method of claim 1 , wherein the electrical grid reference value is a voltage reference.3. The of claim 1 , wherein the electrical grid reference value is a reactive power reference.4. The method of . claim 1 , wherein the wind power plant further comprises at least one STATCOM and wherein a STATCOM voltage reference based on the subtraction is dispatched to the STATCOM.5. The of claim 1 , wherein a plurality of maximum reactive power operation ranges are defined for the at least one power converter claim 1 , and comprising:selecting one of the maximum reactive power operation ranges as the least one maximum reactive power operation range based ...

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Номер записи: 33

04-04-2013 дата публикации

METHOD FOR OPERATING A POWER PLANT

Номер: US20130082467A1

Автор: OLIA Hamid, SCHLESIER Jan

Принадлежит: ALSTOM Technology Ltd

The method for operating a power plant including a gas turbine and a steam power generation system that activate, or drive, at least one electric generator, wherein the gas turbine produces flue gases that are supplied into a boiler of the steam power generation system. In a steady operation, the gas turbine generates a first output power greater than zero, the steam turbine generates a second output power greater than zero, and a total generated power is a sum of the first and second output powers and is substantially equal to a house load of the power plant. 1. A method for operating a power plant , including a gas turbine and a steam power generation system that drive at least one electric generator , the method comprising:supplying flue gases produced by the gas turbine into a boiler of the steam power generation system;generating, by the gas turbine in a steady operation, a first output power greater or less than zero; andgenerating, by the steam power generation system, a second output power greater than zero, wherein a total generated power is a sum of the first and second output powers and is substantially equal to a house load of the power plant.2. The method according to claim 1 , comprising:generating the second output power larger than the house load with the steam power generation system; andusing the power generated by the steam power generation system in excess of the house load to drive the gas turbine.3. The method according to claim 1 , wherein the electric generator is connected to a grid.4. A method for starting up a power plant including a gas turbine and a steam power generation system that drive at least one electric generator claim 1 , wherein the gas turbine produces flue gases that are supplied into a boiler of the steam power generation system claim 1 , the method comprising:starting up and loading up the gas turbine to generate a first output power greater than zero and substantially equal to a house load;starting up and loading up the ...

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Номер записи: 34

25-04-2013 дата публикации

Methods for using a carbon dioxide capture system as an operating reserve

Номер: US20130099508A1

Автор: Nareshkumar B. Handagama, Rasesh R. Kotdawala, Vikram S. Shabde

Принадлежит: Alstom Technology AG

A method of controlling a power system includes monitoring a load on an electrical grid, monitoring a power generation from one or more power producers connected to the electrical grid, wherein at least one of the one or more power producers is a power plant including a carbon dioxide capture system, and utilizing the carbon dioxide capture system of the one or more power producers as a operating reserve in response to an increase in the load on the electrical grid or a reduction in the power generation from one or more power producers connected to the electrical grid.

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Номер записи: 35

25-04-2013 дата публикации

REDUCING AND/OR HARVESTING DRAG ENERGY FROM TRANSPORT VEHICLES, INCLUDING FOR CHEMICAL REACTORS, AND ASSOCIATED SYSTEMS AND METHODS

Номер: US20130101502A1

Автор: McAlister Roy Edward

Принадлежит: McAlister Technologies, LLC

The present disclosure is directed to systems and methods for reducing and/or harvesting drag energy from transport vehicles. A system in accordance with a particular embodiment includes a mobile transport platform, a donor substance source carried by the platform, and a thermochemical reactor carried by the platform and coupled to the donor substance. The reactor is configured to carry out a non-combustion dissociation process that dissociates the donor substance into a first constituent and a second constituent. An energy extraction system carried by the transport platform and positioned to extract energy from an airstream passing the transport platform is coupled to the reactor to provide energy for the dissociation process. 1. A chemical processing method , comprising:extracting energy from an airstream passing a moving transport platform;providing the energy to a thermochemical reactor carried by the transport platform; and receiving a donor substance; and', 'dissociating the donor substance into a first constituent and a second constituent in a non-combustion reaction., 'at the thermochemical reactor2. The method of claim 1 , further comprising:braking the transport platform; andtransferring energy resulting from braking the transport platform to the thermochemical reactor to facilitate the non-combustion reaction.3. The method of wherein transferring energy includes transferring heat.4. The method of wherein dissociating includes dissociating a hydrogen-bearing donor substance claim 1 , and wherein the second constituent includes hydrogen.5. The method of wherein the transport platform includes an over-the-road truck.6. The method of wherein extracting energy includes positioning a turbine in the airstream and wherein the method further comprises:driving an electric generator with the turbine;providing power from the electric generator to the reactor; andreducing a speed of the transport platform by the force of the airstream on the turbine.7. A reactor ...

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Номер записи: 36

02-05-2013 дата публикации

Wind power installation and method for adjusting the rotor rotation axis

Номер: US20130106109A1

Автор: Frank Richert, Sebastian Pflaum

Принадлежит: Individual

The invention is directed to a wind power installation ( 1 ) with a rotor ( 4 ) which has two or possibly more rotor blades ( 5 ) and which is rotatably bearing-supported for rotation around a rotor rotation axis ( 2 ). The rotor is connected to a generator for generating electrical power, and the rotor and the generator form a part of a turbine (T) which is received by a turbine carrier ( 3; 40 ), and the turbine carrier is rotatably arranged at a supporting structure ( 7 ). The turbine is movably mounted in the turbine carrier by means of a bearing device so that the spatial position of the turbine (T) in the turbine carrier can be modified, and a pivoting range of the turbine (T) corresponding to a pivoting range of the rotor rotation axis includes a first angle range and a second angle range relative to a reference plane, and the entire pivoting range is at least 120°. The invention is also directed to a method for operating the wind power installation and to measures associated with an assembly or disassembly of the wind power installation ( 1 ).

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Номер записи: 37

02-05-2013 дата публикации

Electromotive drives

Номер: US20130106258A1

Автор: Donald C Miller

Принадлежит: Fallbrook Intellectual Property Co LLC

A transmission having a plurality of tilting balls and opposing input and output discs provides an infinite number of speed combinations over its transmission ratio range. The transmission provides multiple powerpaths and can be combined with electrical components to provide motor/generator functionality, which reduces the overall size and complexity of the motor and transmission compared to when they are constructed separately. In one embodiment, rotatable components of a continuously variable transmission are coupled separately to an electrical rotor and to an electrical stator so that the rotor and stator rotate simultaneously in opposite directions relative to one another. In other embodiments, an electrical rotor is configured to transfer torque to or from a disc that is in contact with a plurality of speed adjusters, while an electrical stator is configured to transfer torque to a shaft that is operationally coupled to the speed adjusters via an idler.

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Номер записи: 38

02-05-2013 дата публикации

Transmission Arrangement Comprising a Power Mixing Mechanism

Номер: US20130106367A1

Автор: Jean-Robert Desmeules, Samuel Beaudoin

Принадлежит: Transmission CVT Corp Inc

A transmission arrangement for transmitting power from a power source to an electrical generator. The transmission arrangement comprises a continuously variable transmission (CVT) and an alternative transmission that is more efficient at transmitting power than the CVT. The transmission arrangement further comprises a power mixing mechanism for combining power from the CVT and the alternative transmission into a combined power output to be provided to the electrical generator. The percentage of CVT power within the combined power output decreases as the power supplied by the power source increases.

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Номер записи: 39

23-05-2013 дата публикации

WIND POWER ELECTRICITY GENERATING SYSTEM AND RELATIVE CONTROL METHOD

Номер: US20130127165A1

Автор: Vihriälä Harri

Принадлежит: WILIC S.A.R.L.

A snow groomer, equipped with a winch assembly to aid handling of the snow groomer on steep slopes, has a frame; a user interface; a control unit; and the winch assembly, which has a support structure fixed or connected to the frame, a drum that rotates with respect to the support structure about an axis, a cable fixed or connected at one end to the drum and wound about the drum, an actuator assembly for rotating the drum about the axis, and a sensor for determining the position of the drum about the axis; the control unit being configured to control the cable as a function of the position of the drum and the geometry of the drum. 120-. (canceled)21. A wind power electricity generating system comprising:a nacelle;a rotary assembly rotating about an axis with respect to the nacelle; and a stator,', 'a rotor, and, 'an electric machine including 'at least one sensor configured to rotate about the axis together with the rotary assembly, and configured to supply at least one signal related to angular speed,', 'an angular speed detection device configured to detect the angular speed of the rotary assembly, the angular speed detection device includingwherein the rotary assembly includes:a hub,at least one blade fitted to the hub, andthe rotor of the electric machine is connected to the hub; andwherein the sensor is fixed to the rotor of the electric machine.22. The wind power electricity generating system of claim 21 , including a control device coupled to the angular speed detection device claim 21 , the control device being configured to control the wind power system based on the angular speed supplied by the angular speed detection device.23. The wind power electricity generating system of claim 21 , including an inverter coupled to the electric machine claim 21 , the angular speed detection device being coupled to the inverter.24. The wind power electricity generating system of claim 21 , wherein the sensor is an accelerometer or an inclinometer.25. The wind power ...

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Номер записи: 40

23-05-2013 дата публикации

Central Wind Turbine Power Generation

Номер: US20130127166A1

Автор: Izadian Afshin

Принадлежит: Indiana Univeristy Research & Technology Corporation

A wind power conversion apparatus for efficiently generating electric power is disclosed. The apparatus includes at least one blade, the at least one blade being configured to rotate when exposed to wind, a fluid pump mechanically coupled to the at least one blade and configured to pressurize fluid from a low pressure fluid to a high pressure fluid, a fluid motor fluidly coupled to the fluid pump and configured to rotate an output shaft in response to the high pressure fluid and thereby providing the low pressure fluid, and an electric generator mechanically coupled to the fluid motor and configured to generate electric power in response to the rotation of the output shaft of the fluid motor. 1. A wind power conversion apparatus , comprising:at least one blade, the at least one blade configured to rotate when exposed to wind;a fluid pump mechanically coupled to the at least one blade and configured to pressurize fluid from a low pressure fluid to a high pressure fluid;a fluid motor fluidly coupled to the fluid pump and configured to rotate an output shaft in response to the high pressure fluid and thereby providing the low pressure fluid; andan electric generator mechanically coupled to the fluid motor and configured to generate electric power in response to the rotation of the output shaft of the fluid motor.2. The wind power conversion apparatus of claim 1 , further comprising:a fluid buffering circuit fluidly coupled to the fluid pump for buffering the high pressure fluid.3. The wind power conversion apparatus of claim 1 , the fluid buffering circuit further comprising:a fluid flow controller fluidly coupled to the fluid pump;an accumulator fluidly coupled to the fluid flow controller in a series manner; anda check valve in parallel combination with the series combination of the accumulator and the fluid flow controller.4. The wind power conversion apparatus of claim 1 , further comprising:a check valve fluidly coupled to the fluid pump and to the fluid motor.5. ...

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Номер записи: 41

23-05-2013 дата публикации

Method for Generating Tidal Energy Utilizing the Scalar Gravitational Potential of Celestial Bodies

Номер: US20130127174A1

Автор: Cumming Duncan G.

Принадлежит:

Tidal energy generator uses the scalar gravitational potential to utilize energy from celestial bodies. Kinetic energy is extracted from the celestial objects by means of a system including a rotatable arm, a mass fluctuation producing system arranged on the arm and including dielectric material whose mass fluctuates when subjected to a changing electromagnetic field in view of the scalar gravitational potential of the celestial objects, a rotation system that rotates the arm at a variable speed to cause rotation of the mass fluctuation producing system thereon, and a control system that controls the mass fluctuation producing system and rotation system in order to accelerate the dielectric material when it has a relatively light mass and decelerate the dielectric material when it has a relatively heavy mass. Excess energy arising from an energy differential between the acceleration and deceleration of the dielectric material is directed to a load. 1. A system for extracting energy from celestial objects based on the scalar gravitational potential of the celestial objects , comprising:a rotatable arm;a mass fluctuation producing system arranged on said arm and comprising dielectric material whose mass fluctuates between a relatively light mass and a relatively heavy mass when subjected to a changing electromagnetic field in view of the scalar gravitational potential of the celestial objects;a rotation system that rotates said arm at a variable speed to cause rotation of said mass fluctuation producing system thereon; anda control system coupled to said mass fluctuation producing system and said rotation system and configured to control said mass fluctuation producing system and said rotation system in order to accelerate the dielectric material when it has a relatively light mass and decelerate the dielectric material when it has a relatively heavy mass,whereby excess energy arising from an energy differential between the acceleration and deceleration of the ...

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Номер записи: 42

30-05-2013 дата публикации

System and method for converter switching frequency control

Номер: US20130134710A1

Автор: Haiqing Weng, Pengcheng Zhu, Wenqiang Yang, Xiaoming Yuan, Yunfeng Liu, Zhuohui Tan

Принадлежит: Individual

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.

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Номер записи: 43

30-05-2013 дата публикации

WASTE HEAT UTILIZATION APPARATUS

Номер: US20130134720A1

Автор: Enokijima Fuminobu, FUKASAKU Hiroshi, Iguchi Masao, MORI Hidefumi

Принадлежит: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

A Rankine cycle circuit is constituted by an expander, which forms a fluid machine, a condenser, a gear pump, which forms a fluid machine, and a boiler. A discharge passage is connected to a discharge chamber of a pump chamber. A branch passage is connected to the discharge passage, and a restriction passage is provided at the end of the branch passage. The restriction passage is open to an internal space K in a generator housing. An outflow passage extends through a partition wall of a center housing member and a side plate. The internal space K in which an alternator is located communicates with an outlet chamber through the outflow passage. 1. A waste heat utilization apparatus including a waste heat source , an electric rotating machine , a first heat exchanger , which transmits waste heat of the waste heat source to refrigerant that flows in a refrigerant circulation channel , an expander , which applies rotational force to a drive shaft of the electric rotating machine utilizing the refrigerant that has passed through the first heat exchanger , and a second heat exchanger , which absorbs heat from the refrigerant that has passed through the expander , wherein the electric rotating machine and the expander are accommodated in a housing assembly , the waste heat utilization apparatus comprising:a branch passage connected to a section of the refrigerant circulation channel that is upstream of the first heat exchanger and downstream of the second heat exchanger, and to an existence region of the electric rotating machine in the housing assembly;an outflow passage connecting a section of the refrigerant circulation channel that is downstream of the first heat exchanger and upstream of the second heat exchanger to the existence region; anddelivery means for delivering the refrigerant from the branch passage to the outflow passage.2. The waste heat utilization apparatus according to claim 1 , wherein the delivery means is located in a section of the refrigerant ...

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Номер записи: 44

30-05-2013 дата публикации

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

Номер: US20130134950A1

Автор: Chassard Pierre, Duthilleul Guillaume, Gendron Vincent, Tisserand Pierre

Принадлежит:

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 ...

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Номер записи: 45

13-06-2013 дата публикации

ELECTRICITY GENERATION SYSTEM THAT WITHSTANDS VOLTAGE DIPS

Номер: US20130147194A1

Автор: Cárcar Mayor Ainhoa, Mayor Lusarreta Jesús

Принадлежит: INGETEAM POWER TECHNOLOGY, S.A.

The invention comprises a doubly-fed generator (), the rotor thereof is connected to the power grid () by a back-to-back converter () and the stator thereof is connected to the power grid (), essentially standing out for additionally comprising at least one first additional impedance () connected in parallel between the generator () rotor and the back-to-back converter (); at least one second additional impedance () connected to the generator stator (); and at least one control unit capable of governing the additional impedances (). 13-. (canceled)412343. Electrical power generation system () resistant to voltage dips which comprises a doubly-fed generator () , the rotor thereof is connected to the power grid () by a back-to-back converter () and the stator thereof is connected to the power grid () , characterized in that it comprises:{'b': 5', '2', '4, 'at least one first additional impedance () connected in parallel between the generator () rotor and the back-to-back converter ();'}{'b': 6', '2, 'at least one second additional impedance () connected to the generator stator (), adapted to be activated only once the grid voltage falls below a dip profile and'}{'b': 5', '6, 'at least one control unit capable of governing the additional impedances (, ).'}5127. System () claim 4 , according to claim 4 , where the generator () rotor is connected to a wind turbine ().61. Method for operating a system () claim 4 , according to claim 4 , characterized in that it comprises:detecting the voltage dip,{'b': 3', '5, 'remaining connected to the grid () and making use, for the required period of time, of the first additional impedance (),'}injecting the required reactive current,detecting that a maximum operating period elapses under these conditions,{'b': 3', '6', '2, 'disconnecting the stator of the grid () stator and activating the second additional impedance () once the grid voltage falls below a dip profile, thereby controlling the generator () load torque,'}{'b': '3', ' ...

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Номер записи: 46

13-06-2013 дата публикации

METHOD AND SYSTEM FOR ADAPTING THE LOAD ON AN ELECTRIAL AND/OR ELECTRONIC COMPONENT IN A WIND TURBINE

Номер: US20130147195A1

Автор: Krug Florian

Принадлежит:

A method is provided for adjusting the stress on an electrical and/or electronic subassembly in a wind turbine. The method includes determining for the electrical and/or electronic subassembly an expected service life up to the point when a maintenance indicator value is reached, which represents a state of the subassembly at which, on the basis of conditions defined in advance, the subassembly should be maintained The method also includes comparing the expected service life against the time point for the next maintenance of the wind turbine. The method further includes controlling the wind turbine and/or at least one other wind turbine in an area around the wind turbine in such a way that the stress on the electrical and/or electronic subassembly is reduced. 115-. (canceled)16. A method for adjusting the stress on an electrical and/or electronic subassembly in a wind turbine , the method comprising:determining for the electrical and/or electronic subassembly an expected service life up to the point when a maintenance indicator value is reached, which represents a state of the subassembly at which, on the basis of conditions defined in advance, the subassembly should be maintained,comparing the expected service life against the time point for the next maintenance of the wind turbine, andcontrolling said wind turbine and/or at least one other wind turbine in an area around the wind turbine in such a way that the stress on the electrical and/or electronic subassembly is reduced.17. The method as claimed in claim 16 , wherein the determination of the expected service life comprises:determining a present stress indicator value for the electrical and/or electronic subassembly,comparing the present stress indicator value against the maintenance indicator value, anddeducing the expected service life on the basis of the relationship between the stress indicator value and the maintenance indicator value.18. The method as claimed in claim 16 , wherein the determination of the ...

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Номер записи: 47

13-06-2013 дата публикации

GAS TURBINE CONTROL DEVICE AND GENERATING SYSTEM

Номер: US20130147208A1

Автор: Fujii Fuminori, Fujishima Yasuo, Hirato Koichiro, Kishi Makoto, SONODA Takashi, Takata Yasutsugu

Принадлежит: MITSUBISHI HEAVY INDUSTRIES, LTD.

Provided is a gas turbine control device that is used in a generating facility including a gas turbine and a generator for generating power when at least rotational power of the gas turbine is transmitted, the gas turbine control device including a first control section for obtaining a first fuel control command for causing generator output to follow a generator output set value decided based on a demand load, where the first control section has a feedback control section (), and the feedback control section () includes a subtraction section () for calculating a deviation of the generator output with respect to the generator output set value, a PI control section () provided in a later stage of control than the subtraction section (), and a peak suppression section () for suppressing a peak in amplitude characteristics of the generator or a utility grid including the generator. 1. A gas turbine control device to be used in a generating facility including a gas turbine and a generator for generating power when at least rotational power of the gas turbine is transmitted , the gas turbine control device comprising:a first control section for obtaining a first fuel control command for causing generator output to follow a generator output set value decided based on a demand load,wherein the first control section includes a feedback control section, and a subtraction section for calculating a deviation of the generator output with respect to the generator output set value,', 'a proportional integral calculation provided in a later stage of control than the subtraction section, and', 'a peak suppression section for suppressing a peak in amplitude characteristics of the generator or a utility grid including the generator., 'wherein the feedback control section includes'}2. The gas turbine control device according to claim 1 , a multiplier section, provided between the subtraction section and the proportional integral calculation, for multiplying an input signal by a gain, ...

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Номер записи: 48

27-06-2013 дата публикации

Estimation of Wind Conditions at a Wind Turbine

Номер: US20130161956A1

Автор: EVANS MARTIN

Принадлежит: VESTAS WIND SYSTEMS A/S

The risk of an extreme gust of wind hitting a wind turbine is estimated by gathering data from one or more sensors for use as training data. This data is acquired over a period of time and is converted in to a feature vector for a given time period by a statistical measure. A number of feature zones are formed, each zone relating to a different estimate of risk with each feature vector being assigned to a risk category. The risk category is defined with reference to the value of one or more chosen turbine parameters at the time the data was acquired. The feature zones are formed from from a measure of distance such as the mean and co-variance of feature vectors from within a given category. Live data is processed by measuring the mahalonobis distance from the feature vector of the live data to the centre of each zone and the risk of an extreme gust is assessed as that of the feature zone to which the mahalonobis distance is lowest. 1. A method of controlling a wind turbine , comprising:acquiring and storing training data relating to one or more sensed variable, the training data comprising a feature vector obtained from at least one statistical measure indicative of risk;assigning each of the training data to a risk category based on a measured parameter and defining feature zones for each category from at least a measure of distance of feature vectors in that category, the feature zones including a high risk zone indicative of a high risk of a gust; andduring operation of the wind turbine, determining an estimate of gust risk by calculating a feature vector periodically from data obtained from at least one sensor and determining to which of the feature zones to assign the feature vector, thereby determining an estimate of the risk of an extreme gust represented by the measured feature vector.2. The method according to claim 1 , comprising outputting a gust risk indicative signal to a wind turbine controller.3. The method according to claim 1 , wherein the feature ...

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Номер записи: 49

04-07-2013 дата публикации

Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange

Номер: US20130168961A1

Автор: AmirHossein POURMOUSA ABKENAR, Danielle A. FONG, Edwin P. Berlin, Jr., Karl E. Stahlkopf, Stephen E. Crane

Принадлежит: LighSail Energy Inc

A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.

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Номер записи: 50

11-07-2013 дата публикации

WIND FARM AND METHOD FOR OPERATING A WIND FARM

Номер: US20130175800A1

Автор: Bluhm Roman, Fortmann Jens

Принадлежит: REPOWER SYSTEMS SE

A method for operating a wind farm and to a wind farm is disclosed. When a wind farm and the wind energy installations involve target values for the reactive power being prescribed by a farm regulatory device, said target values for the reactive power ignored by the control units when controlling the respective wind energy installation in the event of a power supply system fault in the power supply system. Only when the power supply system fault has been rectified are said target values considered by the control units again for controlling the respective wind energy installation. 1. A method for operating a wind farm with a plurality of wind energy installations connected to a grid internal to the wind farm , each with its own control unit for considering setpoint values for the reactive power , a transfer point at which the power generated in the wind farm is passed from the grid internal to the wind farm to a supply grid , and with a farm regulatory device for regulating the setpoint values for the reactive power connected with the control units of the wind energy installations , comprising:when a grid fault occurs, not considering by the control units the setpoint values for the reactive power of the farm regulatory device in controlling the wind energy installation, andafter the grid fault has ended, considering by the control units the setpoint values for the reactive power of the farm regulatory device in controlling the wind energy installation.2. The method of claim 1 , wherein when a grid fault occurs in the supply grid claim 1 , the setpoint values for the reactive power are frozen in the farm regulatory device and claim 1 , after the grid fault in the supply grid has ended claim 1 , the regulation is continued on the basis of the frozen values.3. The method of claim 2 , wherein when a grid fault is detected claim 2 , the setpoint values for the reactive power are frozen without delay.4. The method of claim 2 , wherein an I-branch is provided in the ...

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Номер записи: 51

11-07-2013 дата публикации

Power oscillation damping controller

Номер: US20130175871A1

Автор: Patrik Thuring, Sathees Kumar, Thyge KNÜPPEL

Принадлежит: Individual

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.

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Номер записи: 52

18-07-2013 дата публикации

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

Номер: US20130181451A1

Автор: Boetger Jan, Matzen Bjoern, Nietmann Lars, Schluricke Sebastian

Принадлежит: REPOWER SYSTEMS SE

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 ...

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Номер записи: 53

18-07-2013 дата публикации

POWER PLANT UNIT

Номер: US20130181461A1

Автор: GRUBER Friedrich

Принадлежит: GE JENBACHER GMBH & CO OG

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 ...

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Номер записи: 54

18-07-2013 дата публикации

FAULT TOLERANT ELECTRIC DRIVE SYSTEM

Номер: US20130181687A1

Автор: SMOUT Peter Douglas

Принадлежит: ROLLS-ROYCE ENGINE CONTROL SYSTEMS LTD.

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 ...

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Номер записи: 55

18-07-2013 дата публикации

BROADBAND VIBRATIONAL ENERGY HARVESTING

Номер: US20130181689A1

Автор: OCALAN MURAT

Принадлежит: SCHLUMBERGER TECHNOLOGY CORPORATION

A system that converts environmental vibrational energy into electrical energy includes a transducer that undergoes oscillating movement in response to the vibrational energy in order to produce an oscillating electrical signal. Power electronics process the oscillating electrical signal. A control system (including at least one control element of the power electronics, at least one sensor and control electronics) carries out a control scheme that dynamically varies the dampening of the oscillating movement of the transducer over time. The control scheme is based upon a predetermined parametric relation involving a plurality of variables derived from the properties measured by the at least one sensor. In several embodiments, the plurality of variables includes a first variable representing excitation frequency of the transducer. In another embodiment, the predetermined parametric relation represents relative phase between two variables derived from the properties measured by the at least one sensor. 1. A system for converting environmental vibrational energy into electrical energy for storage in at least one electrical power storage device , the system comprising:a transducer that undergoes oscillating movement in response to the environmental vibrational energy, the transducer producing an oscillating electrical signal in response to the oscillating movement;power electronics, operably coupled between the transducer and the at least one electrical power storage device, the power electronics processing the oscillating electrical signal produced by the transducer, wherein the power electronics includes at least one control element having a configuration that provides variable dampening of the oscillating movement of the transducer in response to at least one control signal supplied thereto;at least one sensor for measuring properties of the oscillations of the transducer over time; andcontrol electronics operably coupled to the at least one control element of the ...

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Номер записи: 56

25-07-2013 дата публикации

SYSTEM AND METHOD FOR OPERATING A WIND TURBINE USING ADAPTIVE REFERENCE VARIABLES

Номер: US20130187383A1

Автор: Esbensen Thomas, Hoegh Gustav, Krishna Ramakrishnan

Принадлежит:

It is described an arrangement for determining a target value of an operational variable of a wind turbine, the arrangement comprising: at least one input terminal for receiving at least one operational parameter of the wind turbine; a determining unit adapted to determine a target value of an operational variable of the wind turbine based on the operational parameter. Further, a corresponding method and a wind turbine are described. 1. An arrangement for determining a target value of an operational variable of a wind turbine , the arrangement comprising:an input terminal for receiving an operational parameter of the wind turbine;a determining unit adapted to determine a target value of an operational variable of the wind turbine based on the operational parameter.2. The arrangement according to claim 1 , a power related operational variable, and/or', 'a rotational speed related operational variable., 'wherein the operational variable comprises3. The arrangement according to claim 1 ,wherein the power related operational variable relates to a power or a torque of the generator or converter of the wind turbine.4. The arrangement according to claim 1 ,wherein the rotational speed related operational variable relates to a generator speed or a rotor speed.5. The arrangement according to claim 1 , an ambient temperature;', 'a wind speed;', 'an icing condition;', 'a air turbulence;', 'an air density;', 'an air humidity;', 'a vibration condition or level of the wind turbine, in particular a blade vibration;', 'a noise parameter indicative of a required and/or actual or estimated noise generated by the wind turbine;', 'a load parameter indicative of a mechanical/electronic required and/or actual load of the wind turbine;', 'a thrust a wind turbine tower is subjected to;', 'an electrical current;', 'an electrical voltage;', 'an electrical active power output by the wind turbine;', 'an electrical reactive power output by the wind turbine;', 'a torque;', 'a rotational speed of ...

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Номер записи: 57

25-07-2013 дата публикации

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

Номер: US20130187385A1

Автор: Ikawa Yoshikatsu, NAKA Takehiro, SHINODA Hisanobu, WAKASA Tsuyoshi, YASUGI Akira

Принадлежит: MITSUBISHI HEAVY INDUSTRIES, LTD.

A turbine controller of a wind turbine generator includes a generated-output-power command value creating section that creates a generated-output-power command value and an optimum-upper-and-lower-limit limiting section that limits the generated-output-power command value by means of an upper limit value and a lower limit value of the generated output power that are determined based on a power curve indicating the relationship between the generated output power and the rotational speed of the generator. Furthermore, the turbine controller includes a limit-value creating section that creates, when the grid frequency is increased above a predetermined reference frequency, a frequency-dependent limit value serving as an upper limit value of the generated-output-power command value, according to the increase in grid frequency; and a first upper-limit limiting section that limits the upper limit value of the generated-output-power command value limited by the optimum-upper-and-lower-limit limiting section, by means of the frequency-dependent limit value. 1. A wind-turbine-generator control system for a wind turbine generator that is interconnected to a utility grid and that generates power with a generator through rotation of a rotor having blades , comprising:a output-power command value creating unit for creating an output-power command value indicating a generated output power of the wind turbine generator;a output-power command value limiting unit for limiting the output-power command value by means of at least an upper limit value of the generated output power, the upper limit value being determined based on a relationship between the generated output power and the rotational speed of the generator;a limit-value creating unit for creating, when a grid frequency, which is a frequency of the utility grid, is increased above a predetermined reference frequency, a first limit value serving as an upper limit value of the output-power command value, according to the ...

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Номер записи: 58

25-07-2013 дата публикации

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

Номер: US20130187447A1

Автор: Anson Lee, Jan S. Pyko, Michael E. List, Michael J. Pawlukiewicz

Принадлежит: CHRYSLER GROUP LLC

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.

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Номер записи: 59

01-08-2013 дата публикации

METHOD AND ARRANGEMENT FOR OPERATING A WIND TURBINE CONVERTER

Номер: US20130193933A1

Автор: Andresen Björn, Yin Bo

Принадлежит:

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 ...

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Номер записи: 60

08-08-2013 дата публикации

POWER TRANSMISSION SYSTEMS

Номер: US20130200617A1

Автор: Burt Leonard William, Cunningham Matthew James, Moreman Matthew James, Smith Christopher Alan

Принадлежит: GE Energy Power Conversion Tecnology Ltd

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 ...

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Номер записи: 61

15-08-2013 дата публикации

WIND FARM HARMONIC PREDICTOR AND METHOD FOR PREDICTING HARMONICS

Номер: US20130207393A1

Автор: LETAS Heinz-Hermann

Принадлежит: REPOWER SYSTEMS SE

A harmonic predictor for a wind farm comprising at least two wind turbines, each having a generator with a converter for generating electrical energy. The harmonic predictor determines the harmonic component expected from the wind farm in order to limit the harmonic component to a harmonic limit. The harmonic predictor comprises a calculation module, an iteration module and a summing module. The calculation module calculates a complex mean value over at least one period of the harmonic component of one of the wind turbines and determines a first equivalent vector therefrom. The iteration module successively connects the calculation module to at least one other of the wind turbines to form at least one second equivalent vector. The summing module sums the equivalent vectors to form a total vector and compares the total vector with the harmonic limit. 1. A wind farm comprising:at least two wind turbines, each having a generator with a converter for generating electrical energy, and a calculation module that calculates a complex mean value over at least one period of the harmonic component of one of the wind turbines and determines a first equivalent vector therefrom,', 'an iteration module that successively connects the calculation module to at least one other of the wind turbines to form at least one second equivalent vector, and', 'a summing module that sums the equivalent vectors to form a total vector and compares the total vector with the harmonic limit., 'a harmonic predictor that determines the harmonic component expected from the wind farm in order to limit the harmonic component to a harmonic limit, the harmonic predictor comprising'}2. The wind farm of claim 1 , wherein the iteration module and the summing module are combined to form a recursion module.3. The wind farm of claims 1 , wherein the converter is adjustable with regard to its fixed-phase and variable-phase part of the harmonic component.4. The wind farm of claim 3 , wherein the harmonic predictor ...

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Номер записи: 62

15-08-2013 дата публикации

Generator torque control methods

Номер: US20130207394A1

Автор: Christopher Alan Smith, Dominic David Banham-Hall, Gareth Anthony Taylor

Принадлежит: GE Energy Power Conversion Technology Ltd

A wind turbine typically includes a generator and a rotating mechanical system having a natural period. The present invention relates to a method of controlling generator torque that minimises oscillations in the speed of the generator rotor. In the event of a grid fault or transient, or a fault in the power converter, the generator torque is decreased at a substantially constant rate with respect to time as shown in graph (c). The rate at which the generator torque is decreases is proportional to the nominal rated torque of the generator and inversely proportional to an integer multiple of the natural period of the rotating mechanical system.

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Номер записи: 63

29-08-2013 дата публикации

Method and apparatus for efficient fuel consumption

Номер: US20130221684A1

Автор: Larry J. Markoski

Принадлежит: Individual

A method for efficient fuel consumption comprises recharging batteries or operating a device carrying out a task, with an engine through an electrical connection. The method also includes monitoring at least one of (i) current in the electrical connection, (ii) voltage of the batteries, and (iii) length of time of the recharging or task, to determine if the recharging has reach a preselected endpoint or the task has been completed. The method further includes generating a signal through a communication link to cause the engine to stop operating by: (a) preventing operation of a spark plug, (b) preventing delivery of fuel to the engine, or (c) preventing delivery of oxygen to the engine.

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Номер записи: 64

29-08-2013 дата публикации

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

Номер: US20130221934A1

Автор: Ichinose Hidekazu, MATSUSHITA Takatoshi, SHINODA Hisanobu, WAKASA Tsuyoshi, Yamashita Yukio

Принадлежит: MITSUBISHI HEAVY INDUSTRIES, LTD.

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 ...

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Номер записи: 65

29-08-2013 дата публикации

Method and device for operating a generator in a recuperation system of a motor vehicle

Номер: US20130221935A1

Автор: Matthias Schmidt

Принадлежит: ROBERT BOSCH GMBH

A setpoint for a mechanical torque of a generator in a recuperation system of a motor vehicle is specified, and a generator current of the generator for setting the specified mechanical torque of the generator is set.

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Номер записи: 66

12-09-2013 дата публикации

Wind turbine generator system and operation control method thereof

Номер: US20130234433A1

Автор: Daniil Dumnov, Kazuhisa Tsutsumi, Masayuki Shimizu, Niall Caldwell, Venkata Pappala, William Rampen

Принадлежит: Mitsubishi Heavy Industries Ltd

An object of the present invention is to provide a wind turbine generator system and an operation control method thereof, which has a superior operation efficiency and stability at a low wind speed and during the occurrence of a gust and is equipped with Ride Through function at Grid low voltage condition. The wind turbine generator comprises a hydraulic pump of a variable displacement type which is rotated by the main shaft, a hydraulic motor of a variable displacement type which is connected to the generator, and a high pressure oil line and a low pressure oil line which are arranged between the hydraulic pump and the hydraulic motor. An accumulator is connected to the high pressure oil line via an accumulator valve. ACC valve control unit controls opening and closing of the accumulator valve based on at least one of wind speed and the state of the grid.

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Номер записи: 67

12-09-2013 дата публикации

SELF-TUNING ENERGY HARVESTER

Номер: US20130234445A1

Автор: Estes Robert Alan

Принадлежит: BAKER HUGHES INCORPORATED

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 ...

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Номер записи: 68

19-09-2013 дата публикации

TURBINE-INTEGRATED HYDROFOIL

Номер: US20130239861A1

Автор: GIZARA ANDREW ROMAN

Принадлежит: INTEGRATED POWER TECHNOLOGY CORPORATION

A turbine integrated within a hydrofoil extracts energy from a free-flowing motive fluid. In the preferred embodiment, the turbine is of the crossflow variety with runner blades coaxial to the width of the hydrofoil. The foremost edge of the hydrofoil comprises a slot covered by a continuously adjustable gate for controlling the overall drag imposed by the turbine. The hydrofoil mounts to a sailing vessel by means of a gimbal on a structure affixed to the hull, enabling the turbine to optimally respond to changes in direction of the free-flowing motive fluid and facilitating guidance and stability of the vessel. 1. A sailing vessel including a generator which generates electricity in response to moving fluids , the sailing vessel comprising:a hull configured to provide flotation;one or more sails configured to harness wind forces to move the hull in a desired direction;a hydrofoil coupled to said hull, the hydrofoil configured to reduce drag on the hull, wherein the hydrofoil houses a turbine for extracting energy from moving fluids; anda gated opening on said hydrofoil configured to adjustably control said moving fluids to thereby adjustably reduce drag on said hull.2. The sailing vessel of wherein said turbine is a cross-flow turbine.3. The sailing vessel of further comprising a battery configured to store electricity generated by said turbine.4. The sailing vessel of wherein said turbine comprises a DC generator.5. The sailing vessel of wherein an average field coil excitation current of said DC generator is controlled using switch mode current control.6. The sailing vessel of wherein said hydrofoil is coupled to said hull using a gimbal.7. (canceled)8. A drag reducing apparatus configured to reduce drag on a vessel and generate electricity claim 1 , the drag reducing apparatus comprising:a gated hydrofoil configured to be coupled to a vessel, said gated hydrofoil housing a turbine operatively coupled to a generator, the generator configured to generate ...

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Номер записи: 69

19-09-2013 дата публикации

Wind Turbine and Method for Operating a Wind Turbine

Номер: US20130241201A1

Автор: Jens Fortmann

Принадлежит: REPOWER SYSTEMS SE

A method is employed for operating a wind turbine. Electrical energy is produced by means of a generator and is fed into an electrical power network. The electrical energy is fed to the secondary side of a transformer at a low voltage and is output on the primary side of the transformer at a higher voltage. The potential on the primary side of the transformer is undefined. In the method, a measured value of the voltage between the primary side of the transformer and the earth potential is first recorded. The measured value is compared with a predefined limit value. The electrical energy produced by the generator is changed if the measured value exceeds the limit value. A wind turbine is designed to carry out the method. Faults in the medium voltage network can be reacted to without an additional star point on the primary side of the transformer being required.

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Номер записи: 70

19-09-2013 дата публикации

ELECTRICAL YAW DRIVE FOR A WIND TURBINE, WIND TURBINE AND METHOD FOR OPERATING A WIND TURBINE

Номер: US20130241202A1

Автор: THISTED JAN, Vinther Soeren

Принадлежит:

An electrical yaw drive for a wind turbine is described, wherein the wind turbine includes a wind turbine nacelle and a wind turbine tower. The electrical yaw drive has an asynchronous motor, an excitation capacitor bank and dump loads, wherein the excitation capacitor bank and the dump loads are electrically connectable to windings of the asynchronous motor. Furthermore, a wind turbine with such an electrical yaw drive and a method for operating such a wind turbine are described. 1. An electrical yaw drive for a wind turbine , wherein the wind turbine comprises a wind turbine nacelle and a wind turbine tower , the electrical yaw drive comprising:an asynchronous motor,an excitation capacitor bank anddump loads,wherein the excitation capacitor bank and the dump loads are electrically connectable to windings of the asynchronous motor.2. The electrical yaw drive according to claim 1 , wherein the electrical yaw drive is a brakeless electrical yaw drive.3. The electrical yaw drive according to claim 1 , wherein the excitation capacitor bank is configured to be connectable to the windings of the asynchronous motor in form of a delta-connection.4. The electrical yaw drive according to claim 1 , wherein the excitation capacitor bank is configured to be connectable to the windings of the asynchronous motor in form of a star-connection.5. The electrical yaw drive according to claim 1 , wherein the excitation capacitor bank and/or the dump loads are electrically connectable to the windings of the asynchronous motor via closed contactors.6. The electrical yaw drive according to claim 1 , wherein the dump loads are electrically connectable to the windings of the asynchronous motor via open contactors.7. A wind turbine claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'an electrical yaw drive according to .'}8. The wind turbine according to claim 7 , further comprising:a power converter,wherein the asynchronous motor is powered via the power converter.9. The ...

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Номер записи: 71

19-09-2013 дата публикации

Doubly-Fed Generator and Doubly-Fed Electric Machine

Номер: US20130241463A1

Автор: Akira Bando, Masaya Ichinose, Yasuaki Nakayama, Yasuhiro Kiyofuji

Принадлежит: HITACHI LTD

The excitation overcurrent detection unit for the doubly-fed electric machine is provided with a function to determine an excitation current magnitude relationship among three phases. The firing pulse is held to on-state or off-state to cause the largest-current phase and the second-largest-current phase to charge the DC capacitor by the operation of diodes. The conduction ratio of the third-largest-current phase or minimum current phase is controlled according to the detected current value to protect against a possible short-circuit across the DC capacitor. When the voltage of the DC capacitor exceeds a preset value, the voltage is suppressed by operating active or passive power devices.

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Номер записи: 72

26-09-2013 дата публикации

GAS TURBINE START WITH FREQUENCY CONVERTOR

Номер: US20130249213A1

Автор: HOFFMANN Juergen, Oesterheld Joerg

Принадлежит: ALSTOM Technology Ltd

The invention relates to a method for the start of a power plant installation (), which comprises a gas turbine (), a generator () coupled to the gas turbine (), and a frequency converter () to feed current into an electrical grid (). In accordance with the method, during the start of the gas turbine (), the generator () is connected to the electrical grid () via the frequency converter () before the operating rotational speed of the gas turbine () is reached, wherein the frequency converter () is controlled such that it generates an output current with the grid frequency. The invention further relates to a power plant installation () for the execution of such a method. 11021821227218127. A method for the start of a power plant installation () comprising a gas turbine () , a generator () coupled to the gas turbine () , and a frequency convertor , which is connectable to an electrical grid () to feed current with a grid frequency , wherein during a start of the gas turbine () , the frequency convertor () is controlled before the nominal rotational speed of the gas turbine () is reached , such that it generates an output current with the grid frequency and the generator () is connected to the electrical grid () via the frequency convertor ().210181272. The method for the start of a power plant installation () as claimed in claim 1 , wherein the generator () is connected to the electrical grid () via the frequency convertor () at a rotational speed less than 90% of the operating rotational speed of the gas turbine ().31018127. The method for the start of a power plant installation () as claimed in claim 1 , wherein the generator () is connected to the electrical grid () via the frequency convertor () as soon as the gas turbine has reached a rotational speed between 70% and 85% of the grid frequency.4101812747. The method for the start of a power plant installation () as claimed in claim 1 , wherein the generator () is connected to the electrical grid () via the ...

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Номер записи: 73

26-09-2013 дата публикации

POWER GENERATING APPARATUS OF RENEWABLE ENERGY TYPE AND METHOD OF OPERATING THE SAME

Номер: US20130249214A1

Автор: Caldwell Niall, Dumnov Daniil, Ichinose Hidekazu, Laird Stephen, Pappala Venkata, Rampen William, Shimizu Masayuki, Tsutsumi Kazuhisa

Принадлежит: MITSUBISHI HEAVY INDUSTRIES, LTD.

In view of the problems above, it is an object of the present invention is to provide a power generating apparatus of renewable energy type which can achieve a desired output of the hydraulic motor and a stable power generation regardless of changes of the renewable energy as well as a method of operation such an apparatus. The power generating apparatus which generates power from a renewable energy source, includes a rotating shaft driven by the renewable energy, a hydraulic pump of variable displacement type driven by the rotating shaft , a hydraulic motor driven by pressurized oil supplied from the hydraulic pump , a generator coupled to the hydraulic motor , a high pressure oil line through which a discharge side of the hydraulic pump is in communication with an intake side of the hydraulic motor , a low pressure oil line through which an intake side of the hydraulic pump is in communication with a discharge side of the hydraulic motor, a motor target output determination unit which determines the target output of the hydraulic motor , POWERbased on the target output of the hydraulic pump, POWER, a motor demand output determination unit which determines a displacement demand Dof the hydraulic motor based on the target output of the hydraulic motor , POWERso that the rotation speed of the generator is constant, and a motor controller which adjust the displacement of the hydraulic motor to the displacement demand D. 1. A power generating apparatus of renewable energy type which generates power from a renewable energy source , comprising:a rotating shaft driven by the renewable energy source;a hydraulic pump driven by the rotating shaft;a hydraulic motor driven by pressurized oil supplied from the hydraulic pump;a generator coupled to the hydraulic motor;a high pressure oil line through which a discharge side of the hydraulic pump is in fluid communication with an intake side of the hydraulic motor;a low pressure oil line through which an intake side of the ...

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Номер записи: 74

26-09-2013 дата публикации

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

Номер: US20130249215A1

Автор: Egedal Per, Kumar Sathees

Принадлежит:

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 ...

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Номер записи: 75

26-09-2013 дата публикации

POLYPHASIC MULTI-COIL GENERATOR

Номер: US20130249502A1

Автор: Ritchey Jonathan

Принадлежит: EXRO TECHNOLOGIES INC.

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 ...

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Номер записи: 76

03-10-2013 дата публикации

RENEWABLE ENERGY EXTRACTION DEVICE TOLERANT OF GRID FAILURES

Номер: US20130257049A1

Автор: Caldwell Niall, Fielding Michael, Taylor Jamie

Принадлежит:

A renewable energy extraction device, such as a wind turbine generator includes a turbine driving a hydraulic pump and a variable displacement hydraulic motor driving an electrical generator connected directly to an electricity grid. The hydraulic motor employs electronically controlled valves operated to select the net displacement of working chambers of the hydraulic motor on each successive cycle of working chamber volume. In the event of an electric grid fault causing the maximum absorbable torque of the electrical generator to collapse, the electronically controlled valves are controlled to substantially reduce the rate of displacement of working fluid by the hydraulic motor, rapidly reducing the torque exerted on the generator rotor. This has the benefit of avoiding pole slip which could otherwise cause serious damage. During the fault, the rate of displacement of working fluid by the hydraulic motor is controlled to maintain the phase and frequency of rotation of the generator rotor in synchrony with the electricity grid so that electricity generation can resume rapidly once the grid failure is rectified. Excess working fluid displaced by the hydraulic pump is stored in an accumulator. When the maximum amount has been stored pressurised fluid is discharged through a throttle to avoid damage but maintain pressure within the hydraulic transmission so that electricity generation can resume rapidly if the grid failure is rectified. If the fault persists, the turbine blades are feathered to reduce power input and if the fault persists for a further period of time, the energy extraction device shuts down. 1. A method of operating an energy extraction device for extracting energy from an energy flow from a renewable energy source , the device comprising: a turbine , a synchronous electrical generator and a hydraulic transmission comprising a hydraulic pump driven by the turbine and a variable displacement hydraulic motor driving the synchronous electrical generator ...

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Номер записи: 77

03-10-2013 дата публикации

OVER-RATING CONTROL OF WIND TURBINES AND POWER PLANTS

Номер: US20130257051A1

Автор: Bowyer Robert, EVANS MARTIN, Spruce Christopher, Turner Judith

Принадлежит: VESTAS WIND SYSTEMS A/S

A wind turbine power plant comprises a plurality of wind turbines, each having a rated output and under the control of a power plant controller. The power plant also has a rated output which may be over-rated in response to one or more electricity pricing data, power plant age and operator demand. This may comprise a schedule of output set point changes which effect seasonal or intraday changes in electricity prices or which reflect aging of the power plant. It may also reflect the price of electricity on spot or futures markets. Once the over-rating of the power plant has been set, the output may be increased by over-rating individual turbines or operating turbines at rated power if the sum of the rated outputs of the turbines exceeds or is equal to the new power plant output set point. 1. A controller for a wind turbine power plant , the power plant comprising a plurality of wind turbines and having a rated output power , the controller comprising a unit for varying the output of the power plant above the rated output in response to at least one of electricity pricing data , power plant age and power plant operator demand.2. A controller according to claim 1 , wherein the controller comprises a store of scheduled changes in the power plant output set point.3. A controller according to claim 2 , wherein the store of scheduled changes in the power plant output set point represents seasonal changes in electricity prices.4. A controller according to claim 2 , wherein the store of scheduled changes in the power plant output set point represents intraday changes in electricity prices.5. A controller according to claim 2 , wherein the store of scheduled changes in the power plant output set point represent the age of the power plant.6. A controller according to claim 5 , wherein the store of scheduled changes in the power point output set point comprises an output set point for each month of the lifetime of the power plant.7. A controller according to wherein the ...

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Номер записи: 78

03-10-2013 дата публикации

Method for early detection and anticipatory control of consumer-end load shedding in an electrical grid, and apparatus for carrying out the method

Номер: US20130261820A1

Автор: Christian Stockmann, Erhard Liebig, Jose Taborda, Marcel Meier

Принадлежит: Alstom Technology AG

A method for early detection and anticipatory control of consumer-end load shedding in a single-phase or polyphase electrical grid supplied with single phase or polyphase by at least one generator driven by at least one rotating machine includes measuring a current and a voltage between the at least one generator and the electrical grid and/or a current and a voltage in the electrical grid, deriving at least one signal from the measured current and voltage and using the at least one derived signal to act on the at least one rotating machine.

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Номер записи: 79

10-10-2013 дата публикации

METHOD FOR OPERATING A POWER GENERATION SYSTEM

Номер: US20130264824A1

Автор: GUPTA Amit Kumar, NIELSEN John Godsk, Yang Liang

Принадлежит: VESTAS WIND SYSTEMS A/S

A method for operating a power generation system coupled to a power grid during a grid unbalance event, a method for determining an injection current to be supplied into a power grid by a power generation system, and a method for addressing an asymmetric grid fault in a power grid connected to a power generation system are provided. The methods may be carried out based on a reactive or an active power/current priority. 1. A method of operating a power generation system coupled to a power grid during a grid unbalance event or a grid fault event , the method comprising:determining a power grid voltage;determining a negative sequence grid voltage of the power grid from the power grid voltage;comparing the determined negative sequence grid voltage with a reference voltage; anddetermining a negative sequence reactive injection current for a possible injection into the power grid by the power generation system based on the result of the comparison.2. The method according to claim 1 , wherein the reference voltage specifies the negative sequence grid voltage towards which the determined negative sequence grid voltage should be reduced by supplying the negative sequence reactive injection current to the power grid.3. The method according to claim 1 , wherein the reference voltage is a tolerance limit on the amount of negative sequence grid voltage for which the power generation system can handle.4. The method according to claim 3 , wherein the reference voltage is set to a small percentage of the nominal grid voltage for which the power generation system can handle.5. The method according to claim 1 , wherein the negative sequence reactive injection current is supplied into the power grid when the determined negative sequence grid voltage exceeds the reference voltage.6. The method according to claim 5 , wherein the negative sequence reactive injection current has a linear relationship with the negative sequence grid voltage up to a predetermined maximum negative sequence ...

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Номер записи: 80

10-10-2013 дата публикации

PERMANENT MAGNET GENERATOR INDUCTANCE PROFILE IDENTIFICATION

Номер: US20130265013A1

Автор: ANBARASU Ramasamy, CAO Shu Yu, FONN Swee Yee, GUPTA Amit Kumar, TRIPATHI Anshuman

Принадлежит: VESTAS WIND SYSTEMS A/S

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 ...

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Номер записи: 81

17-10-2013 дата публикации

VERTICAL AXIS WIND TURBINE

Номер: US20130270824A1

Автор: Farley Greg

Принадлежит: WINDLABS, INC.

A turbine assembly is provided. The turbine assembly includes a plurality of sails and a generator assembly configured to convert rotation thereabout to power. A brake assembly may be provided. The brake assembly may include a magnet assembly that rotates with rotation of the plurality of sails, a conducting plate initially spaced-apart from the magnet assembly, and an actuator for translating the conducting plate relative to the magnet assembly during rotation thereof to thereby induce eddy currents that create a magnetic field acting on the conducting plate to impart a retarding force to control the rotational speed thereof. A control module is configured to control the actuator to adjust the spacing between the magnet assembly and the conducting plate in order to maintain the turbine assembly at a predetermined speed. 1. A turbine assembly comprising:a plurality of sails;a generator assembly configured to convert rotation thereabout to power; and a magnet assembly that rotates with rotation of the plurality of sails;', 'a conducting plate initially spaced-apart from the magnet assembly; and', 'an actuator for translating the conducting plate relative to the magnet assembly during rotation thereof to thereby induce eddy currents that create a magnetic field acting on the conducting plate to impart a retarding force to control the rotational speed thereof; and, 'a brake assembly includinga control module configured to control the actuator to adjust the spacing between the magnet assembly and the conducting plate in order to maintain the turbine assembly at a predetermined speed.2. The turbine assembly of claim 1 , wherein the generator assembly includes:a coil mold having a plurality of coil packs therein; anda magnet assembly spaced-apart from the coil mold and configured to rotate with rotation of the plurality of sails.3. The assembly of claim 2 , wherein the generator assembly is coupled to the grid.4. The assembly of claim 2 , further comprising an inverter ...

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Номер записи: 82

17-10-2013 дата публикации

Wind Power Generator

Номер: US20130270825A1

Автор: IWATA Takeshi, KATO Tatsuro, YANAGITA Norihito

Принадлежит: Hitachi, Ltd.

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 ...

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Номер записи: 83

17-10-2013 дата публикации

WIND TURBINE WITH A PRIMARY AND A SECONDARY GENERATOR AND METHOD OF OPERATING SUCH WIND TURBINE

Номер: US20130270826A1

Автор: ZHU Hongdong

Принадлежит: ENVISION ENERGY (DENMARK) APS

This invention relates to a wind turbine of variable speed type including: a wind turbine tower; a nacelle on said wind turbine; a wind turbine rotor hub rotatably mounted at said nacelle, said wind turbine rotor hub having at least one wind turbine blade mounted thereon and a shaft coupled to said wind turbine rotor hub and to, optionally via a gear box, a primary generator which via power lines has a primary stator electrically connected to a grid connection and a primary rotor electrically connected to a back-to-back converter at a generator side converter end wherein the back-to-back converter at a grid side converter end is electrically connected to the grid connection. The wind turbine further includes a secondary generator coupled to the shaft via a mechanical coupling and electrically connected to the primary rotor of the primary generator and the generator side converter end of the back-to-back converter. 1. A wind turbine of variable speed type comprising:a wind turbine tower;a nacelle provided on said wind turbine;a wind turbine rotor hub rotatably mounted at said nacelle, said wind turbine rotor hub having at least one wind turbine blade mounted thereon;a shaft coupled to said wind turbine rotor hub and to, optionally through a gear box,a primary generator which via power lines has a primary stator electrically connected to a grid connection, and a primary rotor electrically connected toa back-to-back converter at a generator side converter end and wherein the back-to-back converter at a grid side converter end is electrically connected to the grid connection;wherein a secondary generator coupled to the shaft via a mechanical coupling and electrically connected to the primary rotor of the primary generator and to the generator side converter end of the back-to-back converter.2. A wind turbine according to claim 1 , wherein the primary generator is a DFIG-generator.3. A wind turbine according to claim 1 , wherein said secondary generator is a permanent ...

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Номер записи: 84

17-10-2013 дата публикации

OVER-RATING CONTROL IN WIND TURBINES AND WIND POWER PLANTS

Номер: US20130270827A1

Автор: Bowyer Robert, Couchman Ian, EVANS MARTIN, Spruce Christopher, Turner Judith

Принадлежит: VESTAS WIND SYSTEMS A/S

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 ...

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Номер записи: 85

24-10-2013 дата публикации

Horizontal axis wind turbine systems and methods

Номер: US20130277971A1

Автор: Hanwoo Cho, Whang Cho

Принадлежит: Individual

Systems and methods for operating horizontal axis wind turbine systems are disclosed. A system includes a turbine rotor and a rotor blade adapted to rotate about a horizontal axis, two vertical shafts, a plurality of gears adapted to translate a rotational motion of the turbine rotor into counter-rotating vertical rotational motions of the shafts, and two generators fixed to a tower, adapted to translate a rotational motion of the shafts into electrical power. A method of operating a horizontal axis wind turbine system includes obtaining a turbine rotor and a rotor blade adapted to rotate about a horizontal axis, obtaining two vertical shafts, obtaining a plurality of gears, and obtaining two generators fixed to a tower, translating a rotational motion of the turbine rotor into counter-rotating vertical rotational motions of the shafts using the gears, and translating a rotational motion of the shafts into electrical power using the generators.

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Номер записи: 86

24-10-2013 дата публикации

METHOD OF CONTROLLING A WIND TURBINE IN A WIND POWER PLANT

Номер: US20130277972A1

Автор: Lovmand Bo

Принадлежит:

Embodiments herein control a wind turbine in a wind power plant where the wind turbine includes a wind turbine controller and at least one connected wind turbine component. Upon receiving a packet containing a “write/read” instruction, the wind turbine controller effectuates a write instruction by changing a set point associated with an attribute of a component in the wind turbine. The controller retrieves information data resulting from performing the write instruction from the component and transmits the information data to a central controller. The invention performs a fast and simple control loop by means of transmitting both the write and the read instruction within one single data packet. 1. A method of controlling a wind turbine in a wind power plant , the wind turbine comprising a wind turbine controller and at least one connected wind turbine component , the method comprising:receiving, at the wind turbine controller, data packets originating from a central controller, wherein at least one of the data packets is a write/read instruction, the write/read instruction comprising one or more instructions that effectuate both a write function and a read function in the wind turbine; and effectuating a write instruction based on a desired value contained in the write/read instruction, the write instruction setting the desired value as a set point of an attribute of the wind turbine component,', 'retrieving a current value of the attribute from the wind turbine component, and', 'upon receiving the current value from the wind turbine component, transmitting the current value to the central controller,, 'during a first control loop execution in the central controllerwherein the central controller is configured to determine, during a second control loop execution, an updated value for the set point of the attribute based on the current value, and wherein the updated value is received at the wind turbine controller in a subsequently transmitted write/read instruction.2 ...

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Номер записи: 87

24-10-2013 дата публикации

Method of controlling speed of a variable speed generator

Номер: US20130278228A1

Автор: Eric D. Albsmeier, Isaac S. Frampton

Принадлежит: Kohler Co

Some embodiments relate to a method of controlling speed of a variable speed generator. The method includes detecting a load of the variable speed generator and determining a target speed for the variable speed generator based on the load supplied by the variable speed generator. The method further includes using a controller to adjust the speed of the variable speed generator based on the target speed. The method may further include correcting the target speed by calculating a correction factor that corrects the target speed based on a voltage produced by the variable speed generator.

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Номер записи: 88

31-10-2013 дата публикации

Device and Method for Inhibiting Vibration of Superconducting Magnetic Suspension Rotor

Номер: US20130285624A1

Автор: Cui Chunyan, Hu Xinning, Wang Hui, Wang Qiuliang

Принадлежит: Institute of Electrical Engineering, Chinese Academy of Sciences

A device and a method for inhibiting vibration of a superconducting magnetic suspension rotor. The device comprises a rotor cavity housing, lateral coils, a superconducting rotor with a rotor top plane, a copper plate, pole shoes, a z-axial vibration measuring sensor, an x-axial vibration measuring sensor, a y-axial vibration measuring sensor, and a copper ring, the pole shoes having a spherical inner surface and being arranged symmetrically up and down so as to form a rotor cavity; the annular lateral coils being closely adjacent to an outside cylindrical surface of the rotor cavity housing and fixed to the same; the z-axial vibration measuring sensor being fixed to a central region of the copper plate; the x-axial vibration measuring sensor being mounted along an x-coordinate axis and the y-axial vibration measuring sensor mounted on a on the copper ring which is mounted along an equatorial plane of the rotor. 1. A device for inhibiting vibration of a superconducting magnetic suspension rotor , comprising a rotor cavity housing , an upper lateral coil , a lower lateral coil , a superconducting rotor with a rotor top plane , a copper plate , two pole shoes , a z-axial vibration measuring sensor , an x-axial vibration measuring sensor , a y-axial vibration measuring sensor , and a copper ring , the pole shoes having a spherical inner surface , the two pole shoes being arranged symmetrically up and down so as to form a rotor cavity; the superconducting rotor being positioned in the rotor cavity; the upper lateral coil and the lower lateral coil being closely adjacent to an outside surface of the rotor cavity housing and fixed to the outside surface; the copper plate being fixed to an upper end face of the rotor cavity housing , the z-axial vibration measuring sensor being fixed to a central region of the copper plate; the x-axial vibration measuring sensor being mounted along an x-coordinate axis and on the copper ring which is mounted along an equatorial plane of ...

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Номер записи: 89

07-11-2013 дата публикации

Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange

Номер: US20130291529A1

Автор: AmirHossein POURMOUSA ABKENAR, Danielle A. FONG, Edwin P. Berlin, Jr., Karl E. Stahlkopf, Stephen E. Crane

Принадлежит: LightSail Energy Inc

A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.

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Номер записи: 90

07-11-2013 дата публикации

ELECTRO-HYDRODYNAMIC WIND ENERGY SYSTEM

Номер: US20130293034A1

Автор: Carmein David, WHITE DAWN

Принадлежит:

A system for electro-hydrodynamically extracting energy from wind includes an upstream collector that is biased at an electric potential and induces an electric field. An injector introduces a particle into the electric field. The wind drag on the particle is at least partially opposed by a force of the electric field on the particle. A sensor monitors an ambient atmospheric condition, and a controller changes a parameter of the injector in response to a change in the atmospheric condition. 1. A system for extracting energy from a fluid stream , comprising:a charger that induces an electric field and applies charges of a first polarity to particles and introduces the charged particles into the fluid stream, fluid stream drag on the charged particle at least partially opposed by electric field drag on the particle;a sensor for monitoring an ambient environmental parameter; anda controller that changes a system parameter in response to a change in the environmental parameter.2. The system of claim 1 , wherein the charger comprises a field charger.3. The system of claim 2 , wherein the particle comprises a particle from the ambient environment.4. The system of claim 3 , wherein the particle comprises a sand particle.5. The system of claim 2 , further comprising an injector that defines the particles charged by the charger.6. The system of claim 5 , wherein the field charger comprises an electrode claim 5 , wherein the injector comprises a tip arranged coplanar with the electrode.7. The system of claim 6 , wherein the injector comprises a nozzle.8. The system of claim 1 , wherein the ambient environmental parameter comprises a flow velocity of the fluid stream.9. The system of claim 8 , wherein the system parameter is a charger parameter.10. The system of claim 9 , wherein the charger parameter comprises an amount of charge applied to each particle.11. The system of claim 1 , wherein the applied charges charge each particle to a potential less than a Rayleigh limit for ...

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Номер записи: 91

07-11-2013 дата публикации

Circuit and Method for De-Energizing a Field Coil

Номер: US20130293176A1

Автор: Auer Frank, Koeppl Benno, Scheffer Michael

Принадлежит:

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.

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Номер записи: 92

14-11-2013 дата публикации

REMOTE MONITORING OF A TRANSPORT REFRIGERATION SYSTEM

Номер: US20130298575A1

Автор: Burnham Randall Scott, Eslinger Arlo, Stark Mike

Принадлежит: THERMO KING CORPORATION

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 ...

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Номер записи: 93

14-11-2013 дата публикации

Systems and methods for optimizing power generation in a wind farm turbine array

Номер: US20130300115A1

Автор: John E. Seem, Yaoyu Li

Принадлежит: Johnson Controls Technology Co

A method for controlling turbines in a wind farm turbine array is shown and described. The method includes using a cascade of self-optimizing controllers to in an attempt to maximize the power generated by at least a portion of the wind farm turbine array, wherein at least one of the self-optimizing controllers for an upstream turbine is configured to control the upstream turbine in an attempt to maximize the combined total of (a) the power output of the upstream turbine and (b) the power output of at least one downstream turbine.

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Номер записи: 94

14-11-2013 дата публикации

METHOD AND ARRANGEMENT FOR DAMPING A SHAFT OSCILLATION

Номер: US20130300116A1

Автор: Egedal Per, Kumar Sathees

Принадлежит:

A method for damping an oscillation of a rotational speed of a shaft of a wind turbine is described. A converter is connected between a generator and a wind turbine output terminal. The rotational speed of the shaft or the generator is measured. A DC-link voltage reference varying in dependence with the rotational speed is determined. A DC-link voltage of a DC-link of the converter according to the DC-link voltage reference is controlled. 1. A method for damping an oscillation of a rotational speed of a shaft or a generator of a wind turbine having a converter connected between the generator and a wind turbine output terminal , comprising:measuring the rotational speed of the shaft or the generator;determining a DC-link voltage reference varying in dependence with the rotational speed; andcontrolling a DC-link voltage of a DC-link of the converter according to the DC-link voltage reference.2. The method according to claim 1 , further comprising:determining a signal based on the rotational speed; andadding the signal to a preliminary DC-link voltage reference for determining the DC-link voltage reference.3. The method according to claim 2 , wherein the preliminary DC-link voltage reference is a constant.4. The method according to claim 2 , further comprising:high pass filtering the rotational speed; and/orperforming a gain to the filtered rotational speed for determining the signal.5. The method according to claim 2 , further comprising phase shifting the signal so that the DC-link voltage reference has a damping effect on shaft oscillation at a resonance frequency.6. The method according to claim 1 , further comprising supplying the DC-link voltage reference to a DC-link controller for controlling the DC-link voltage.7. The method according to claim 1 , wherein the DC-link voltage is changed with an optimum magnitude and phase delay with respect to measured oscillations in a generator speed.8. The method according to claim 1 , further comprising exchanging power ...

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Номер записи: 95

14-11-2013 дата публикации

SHAFT-DRIVEN GENERATOR SYSTEM

Номер: US20130300380A1

Автор: Brunotte Christoph, Hiller Marc, SOMMER RAINER

Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A shaft-driven generator system has a generator connected to a converter. An inverter supplies an AC voltage on a network side. The converter and the inverter are linked via a DC link circuit. The inverter has at least two phase modules, which each have an upper and a lower valve branch, which each have a plurality of two-pole sub-systems connected electrically in series. Each sub-system has a unipolar storage capacitor, to which a series circuit of two gate-controlled turn-off semiconductor switches is connected electrically in parallel. Each semiconductor switch has a diode connected antiparallel therewith. Thus, a shaft-driven generator system is obtained that has a DC-link converter as a static frequency converter for complying with the required network feedback and for managing transient operating states. 17.-. (canceled)8. A shaft-driven generator system comprising:a shaft-driven generator,a network-side inductance, anda DC-link converter, wherein the DC-link converter comprisesan AC/DC converter connected on an input side to the generator, anda DC/AC inverter connected on an output side to a network, with the converter connected to the inverter by a DC link circuit,wherein the inverter has at least two phase modules, each phase module having an upper valve branch and a lower valve branch, each upper valve branch and each lower valve branch having a plurality of two-pole sub-systems electrically connected in series, wherein each two-pole sub-system comprises a series circuit formed of two gate-controlled turn-off semiconductor switches and diodes connected antiparallel with the semiconductor switches in one-to-one correspondence, and a unipolar storage capacitor electrically connected in parallel with the series circuit.9. The shaft-driven generator system of claim 8 , wherein the AC/DC converter is a multi-pulse diode rectifier.10. The shaft-driven generator system of claim 8 , wherein the AC/DC converter is a multi-pulse self-commutated converter.11. The ...

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Номер записи: 96

21-11-2013 дата публикации

COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE

Номер: US20130307269A1

Автор: Berlin, Crane Stephen E., FONG Danielle A., JR. Edwin P.

Принадлежит: LIGHTSAIL ENERGY, INC.

A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. 1. An apparatus comprising:a host computer comprising a processor in electronic communication with a computer-readable storage medium, the computer readable storage medium having stored thereon one or more codes to instruct the processor to,receive a signal indicating a property of an energy recovery system comprising a first chamber receiving a piston in selective communication with a mechanical linkage comprising a piston rod,in response to the received signal, control an element of the energy recovery system to maintain a temperature of air in the first chamber within a temperature range,wherein in response to the received signal, the code stored on the computer readable storage medium is configured to instruct the processor to control an electrical load applied to a generator in communication with the mechanical linkage, during an expansion cycle.2. An apparatus as in further comprising a sprayer configured to introduce liquid to the chamber for gas-liquid heat exchange.3. An apparatus as in ...

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Номер записи: 97

21-11-2013 дата публикации

System and method for sensor-less hysteresis current control of permanent magnet synchronous generators without rotor position information

Номер: US20130307451A1

Автор: Anthony J. Baroud, Igor Stamenkovic, Nigel Schofield, Nikola Milivojevic, Yusuf Gurkaynak

Принадлежит: MAGDRIVE LLC

A system and method are provided for controlling a permanent magnet synchronous generator without rotor position information, utilizing sensor-less hysteresis control and brushless direct current switching scheme. The present invention controls the current and torque of the permanent magnet generator without information of the rotor position in respect to the stator.

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Номер записи: 98

21-11-2013 дата публикации

Vehicular power generation system and power generation control method for the same

Номер: US20130307492A1

Автор: Hideaki Tani, Satoshi Wachi, Toshiaki Date

Принадлежит: Mitsubishi Electric Corp

A vehicular power generation system includes: a battery which is charged by power generation electric power of a generator that is driven by an internal combustion engine; and a power generation control device which reduces the amount of fuel to be consumed for power generation of the internal combustion engine. The power generation control device includes: a unit which sets an operating range that is small in the amount of fuel to be consumed for an increase in torque of the internal combustion engine; a unit which sets electric power with high power generation efficiency to a target value of power generation electric power according to rotation speed and power generation voltage of the generator; and a unit which controls so that the amount of power generation of the generator is a target value when the operating point of the internal combustion engine is in the operating range.

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Номер записи: 99

28-11-2013 дата публикации

WIND TURBINE GENERATOR

Номер: US20130313826A1

Автор: GUPTA Amit Kumar, Karuppanan Yugarajan, Opina Gil Lampong, Qian Ji, TRIPATHI Anshuman, Yang Liang

Принадлежит: VESTAS WIND SYSTEMS A/S

A system for a wind turbine generator comprising: a set of voltage limiting elements, and a controller configured to bypass the voltage limiting elements when a line voltage is below a predetermined threshold, and configured to connect each voltage limiting element in series between a grid side converter and a turbine transformer of the wind turbine generator, and to determine a current control reference signal for controlling the grid side converter (to generate a determined current) when the line voltage is above the predetermined threshold. 1. A system for a wind turbine generator comprising:a set of voltage limiting elements, anda controller configured to bypass the voltage limiting elements when a line voltage is below a predetermined threshold, and configured to connect each voltage limiting element in series between a grid side converter and a turbine transformer of the wind turbine generator, and to determine a current control reference signal for controlling the grid side converter (to generate a determined current) when the line voltage is above the predetermined threshold.2. The system in wherein the controller is configured to determine the current control reference signal according to at least one of an impedance of the voltage limiting elements claim 1 , the line voltage claim 1 , a grid side converter voltage and a grid frequency.3. The system in wherein the controller is configured to shut down the wind turbine generator if the line voltage is above the predetermined threshold for longer than a predetermined period.4. The system in wherein each voltage limiting element comprises a resistor in parallel with a bypass switch.5. The system in wherein each voltage limiting element further comprises a switch in series with the resistor.6. The system in wherein the controller is configured to open the bypass switch and close the switch in series with the resistor when the line voltage is above the predetermined threshold.7. The system in wherein the wind ...

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Номер записи: 100