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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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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 55036. Отображено 100.
12-01-2012 дата публикации

Isolated operation detection device

Номер: US20120007436A1
Принадлежит: Fuji Electric Co Ltd

With a method whereby reactive power is changed from a fluctuating output to a constant output by a frequency rise or fall monitor circuit stage level being exceeded, and an isolated operation is detected, a problem occurs with a small scale grid in that, as the frequency is liable to fluctuate due to a load fluctuation, there is liable to be a false detection of an isolated operation. In contrast, an abnormal frequency stage detection can be performed such that the frequency at a point when the rising edge of a reactive power fluctuation is detected, and the frequency at a point when the falling edge is detected, are detected sequentially, and an abnormal frequency stage detection is recognized when the order of the difference between the current detection value and the previous detection value is “increase”, “decrease”, “increase”.

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12-01-2012 дата публикации

Voltage control at windfarms

Номер: US20120010756A1
Принадлежит: General Electric Co

A voltage control arrangement for a system of multiple windfarms with transmission lines. Voltage is regulated at a point of regulation on the system, such as a high voltage substation or other system bus. Regulation is achieved at the point of regulation by sensing the voltage, comparing to a reference voltage, and adjusting the reactive power output of the wind turbines and other equipment in the system. The regulation point may be shifted to another point if needed to respect voltage limits at that points of the system after attempting to shift reactive load to restore voltage within limits at the other points in the system. The reference voltage may be adjusted to minimize losses for the system of multiple windfarms and transmission lines. A loss optimizing algorithm is applied to the combined multiple windfarm and transmission line to shift reactive load among local windfarms to minimize losses and to shift reactive load among individual wind turbines within an individual windfarm.

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26-01-2012 дата публикации

Method and apparatus for minimizing harmonic currents in a wind turbine park

Номер: US20120019007A1
Принадлежит: SIEMENS AG

A collector system ( 49 ) for supplying electrical energy to a grid ( 50 ). The collector system ( 49 ) comprises a plurality of voltage sources ( 46/48/66/68 ) each producing a fundamental frequency current and a plurality of harmonic frequency currents related to the fundamental frequency, wherein one or more of the plurality of fundamental frequency currents have a time displacement relative to a current on the collector system ( 49 ), each one of the plurality of voltage sources ( 46/48/66/68 ) connected to the collector system ( 49 ) through a transformer ( 51/52/70 ), certain ones of the transformers ( 51/52/70 ) imparting a phase angle shift to compensate for the time displacement of the fundamental frequency current produced by each voltage source ( 46/48/66/68 ), and wherein the time displacement and the phase angle shifts are selected to reduce harmonic currents on the collector system ( 49 ).

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26-01-2012 дата публикации

Wind turbine with a controller configured to manage resonant effects

Номер: US20120022714A1
Автор: Eng Kian Kenneth Sng
Принадлежит: Vestas Wind Systems AS

A method and apparatus of operating a controller usable for operating a wind turbine is provided. The wind turbine includes a voltage converter being connectable to a power grid via a filter arrangement. The method includes determining a line voltage and adding the determined line voltage to the output of the voltage converter with a time delay. The time delay is adjusted such that resonant effects occurring at the filter arrangement are decreased.

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02-02-2012 дата публикации

Integral ac module grounding system

Номер: US20120024563A1
Принадлежит: General Electric Co

A photovoltaic (PV) ac-module grounding system includes a plurality of PV dc-voltage modules. Each PV dc-voltage module is integrated with a corresponding dc-ac micro-inverter to provide a corresponding PV ac-voltage module. Each PV ac-voltage module includes an ac-voltage plug and play connector that includes a dc ground conductor. Each dc-ac micro-inverter is internally electrically connected to its own chassis ground or metal enclosure which in turn is electrically connected to a corresponding dc ground conductor. A dc ground path is carried through an ac power bus from ac-voltage module to ac-voltage module through the plug and play connectors via the dc ground conductors.

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02-02-2012 дата публикации

Systems and Methods for Distributing Energy in a Roadway

Номер: US20120025629A1
Автор: Laurian Stoicoviciu
Принадлежит: Individual

A system and method for powering of a vehicle is disclosed. In accordance with embodiments of the present disclosure, a roadway may include an embedded conductor and a source of energy. The embedded conductor may be embedded in the roadway configured to transfer energy to a vehicle upon the roadway via magnetic induction or electric conduction. The source of energy may be applied upon or embedded in the roadway and configured to generate electric current to the embedded conductor. The source of energy may include a solar power generator, a thermoelectric power generator, a piezoelectric power generator, and/or any other suitable source of energy.

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02-02-2012 дата публикации

Photovoltaic inverter system and method of starting same at high open-circuit voltage

Номер: US20120026769A1
Принадлежит: General Electric Co

A power inverter system includes a DC to AC inverter configured to convert DC voltage from a DC power source to AC voltage. A DC link couples the DC power source and the inverter. An inverter pre-charger operates to pre-charge the inverter to achieve a desired DC link voltage prior to connecting the power inverter system to an AC power grid. A phased lock loop synchronizes the pre-charged inverter to the AC power grid prior to connecting the power inverter system to the AC power grid. The pre-charged inverter regulates the DC link voltage to about the minimum voltage level that allows control of AC grid currents via the inverter subsequent to connecting the power inverter system to the AC grid. The inverter operates in a maximum power point tracking control mode only subsequent to a first voltage transient caused by connecting the DC power source to energize the power inverter system.

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02-02-2012 дата публикации

Centralized power conditioning

Номер: US20120029723A1
Принадлежит: American Superconductor Corp

A power plant for providing electric power to a power grid includes energy sources; power conditioning units and a controller configured to cause power provided to the grid to have selected electrical characteristics. The controller is in high speed real-time communication with the power conditioning units and programmed to provide instructions to the power conditioning units.

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09-02-2012 дата публикации

Systems for Optimized Solar Power Inversion

Номер: US20120032515A1
Принадлежит: AMPT LLC

The DC-AC inversion of solar power in systems having high voltage, highly varying photovoltaic power sources may be provided to optimize input into a high voltage, high power photovoltaic DC-AC inverter. The inverter may coordinate the conversion of solar power in photovoltaic DC-DC power converters to achieve a desired inverter operating condition. Desired inverter operating conditions may include singular voltage inputs, optimal voltage inputs, inverter sweet spot voltage inputs, and the like. The converters may be coordinated to convert output to optimal input characteristics of the inverter, to control a posterior photovoltaic operating condition, to control the converter for inverter operating conditions, and the like. Output from the inverter may be transferred to a power grid at high power levels with coordinated control possible for various elements.

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09-02-2012 дата публикации

Distributed maximum power point tracking system, structure and process

Номер: US20120032665A1
Принадлежит: NEWDOLL ENTERPRISES LLC

Distributed maximum power point tracking systems, structures, and processes are provided for power generation structures, such as for but not limited to a solar panel arrays. In an exemplary solar panel string structure, distributed maximum power point tracking (DMPPT) modules are provided, such as integrated into or retrofitted for each solar panel. The DMPPT modules provide panel level control for startup, operation, monitoring, and shutdown, and further provide flexible design and operation for strings of multiple panels. The strings are typically linked in parallel to a combiner box, and is then toward and enhanced inverter module, which is typically connected to a power grid. Enhanced inverters are controllable either locally or remotely, wherein system status is readily determined, and operation of one or more sections of the system are readily controlled. The system provides increased operation time, and increased power production and efficiency, over a wide range of operating conditions.

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09-02-2012 дата публикации

Partial power micro-converter architecture

Номер: US20120033466A1
Автор: Zaki Moussaoui
Принадлежит: INTERSIL AMERICAS LLC

A system and method for reducing the amount of power processed in a power converter during power generation is provided. In one aspect, the system includes a partial power converter connected between a set of power sources and a load. The partial power converter includes a primary power converter coupled to a first power source and a set of auxiliary power converters coupled to the remaining power sources. Moreover, the secondary power converters only process current that is necessary to achieve a maximum power point (MPP) for each power source. In one example, the secondary power converters are smaller in size and/or power rating, as compared to the primary power converter, and thus reduce the size and cost of the system. Additionally, the secondary power converters operate on an “as-needed” basis rather than in “always-on” fashion, and thus are more reliable and efficient.

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16-02-2012 дата публикации

Method of and Apparatus for Connecting a Photovoltaic Device to an AC Power Grid

Номер: US20120039101A1
Принадлежит: SMA Solar Technology AG

A method of connecting a photovoltaic device to an AC power grid through an inverter includes monitoring a DC voltage at an input of an inverter, and activating the inverter when the monitored DC voltage exceeds a first predetermined threshold. The method further includes synchronizing an output voltage of the inverter with a grid voltage, connecting an output of the inverter to the AC power grid upon synchronization if the monitored DC voltage exceeds a second predetermined threshold, and deactivating the inverter if a detected power being fed through the inverter falls below a predetermined power threshold while maintaining the connection between the output of the inverter and the AC power grid. Lastly, the method includes disconnecting the output of the deactivated inverter from the grid if the monitored DC voltage falls below a third predetermined threshold. Further, an apparatus that performs such functionality is also provided.

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23-02-2012 дата публикации

Integrated photovoltaic module

Номер: US20120042588A1
Принадлежит: University of Colorado

The disclosed embodiments increase the power generated by a photovoltaic (PV) array, when the PV panels within the PV array are not uniformly illuminated or oriented or when PV panels are mismatched (e.g., have varying performance characteristics) and/or operate at non-uniform temperatures. It also provides simpler interconnection and wiring of the elements (e.g., PV panels) of the array. A dc-dc converter comprised of a DC transformer is coupled to each PV panel in a photovoltaic array to generate an increased dc voltage from a lower dc voltage produced by the PV panel. The outputs of the dc-dc converters are connected in parallel to a dc bus, which distributes the resulting voltage. As a result, the energy generated by the PV array is increased, the costs of system design and installation are reduced, and it becomes feasible to install PV arrays in new locations such as on gabled or non-planar roofs.

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23-02-2012 дата публикации

Line and neutral point clamped inverter

Номер: US20120044730A1
Принадлежит: ABB Oy

Exemplary embodiments are directed to an inverter and a method for controlling an inverter. The inverter includes a DC link having two capacitor units in series and a neutral point between the capacitor units, and a first and a second inverter leg. Both inverter legs are connected between the poles of the DC link and include four switching devices connected in series. Both inverter legs include an upper connection point between the two topmost switching devices, a lower connection point between the two bottommost switching devices, and an output between the two middle switching devices. Both inverter legs further include a first rectifier device connected between the DC link neutral point and the leg upper connection point, and a second rectifier device connected between the DC link neutral point and the leg lower connection point. Both inverter legs further include a third rectifier device connected between the upper connection point of the leg and the output of the other leg, and a fourth rectifier device connected between the output of the leg and the lower connection point of the other leg.

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01-03-2012 дата публикации

Smart photovoltaic panel and method for regulating power using same

Номер: US20120049833A1
Автор: Charles Chang
Принадлежит: International Rectifier Corp USA

According to one embodiment, a smart photovoltaic (PV) panel comprises a plurality of PV cell groups each including at least one PV cell. The smart PV panel also includes at least one serial boost combiner circuit (SBCC) configured to receive an output from the plurality of PV cell groups as inputs. Each SBCC comprises several boost blocks connected in parallel, each of the boost blocks including a switching device and a respective boost block output directly connected to an output node of the SBCC. In addition a corresponding power terminal of each of the switching devices is directly connected to a common ground node of the SBCC. In one embodiment, the smart PV panel also includes a power inverter coupled to the one or more SBCCs and a communication unit interfaced with a local controller.

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08-03-2012 дата публикации

Junction box

Номер: US20120055529A1
Принадлежит: Ampower Technology Co Ltd

A junction box connected to a plurality of solar cell panels connected in series and under control a control device, includes a plurality of diodes, two ports, a switch, and a communication module. The plurality of diodes is forwardly connected in series to form a diode string with two ends, and each of the plurality of diodes is electrically connected to a corresponding one of the plurality of solar cell panels in parallel. The two ports are respectively connected to the two ends of the diode string and the plurality of solar cell panels, and output DC power of the plurality of solar cell panels. The switch is connected between the diode string and the two ports. The communication module is connected to the switch, and receives control signals from the control device to turn on or off the switch to control output of the DC power of the solar cell panels from the two ports.

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29-03-2012 дата публикации

Lighting Wall Switch with Power Failure Capability

Номер: US20120074843A1
Принадлежит: Wireless Environment LLC

In embodiments of the present invention improved capabilities are described for systems and methods that employ a control component and/or power source integrated in an LED based light source to control and/or power the LED light source wirelessly. In embodiments, the LED based light source may take the form of a standard light bulb that plugs into a standard lighting socket or fixture.

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05-04-2012 дата публикации

Photovoltaic Power Systems

Номер: US20120080943A1
Автор: Vijay G. Phadke
Принадлежит: Astec International Ltd

A power system includes a plurality of DC/DC converters and a DC/AC inverter. The plurality of DC/DC converters having outputs electrically connected in parallel for supplying a DC voltage bus to an input of the DC/AC inverter. The plurality of DC/DC converters each include a maximum power point tracker (MPPT). Various DC/DC converters and DC/AC inverters suitable for use in this system and others are also disclosed.

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19-04-2012 дата публикации

Photovoltaic ladder inverter

Номер: US20120091808A1
Автор: James B. Paull
Принадлежит: STELLARIS Corp

Techniques for DC-to-AC conversion are disclosed, and may be embodied in a solar inverter device that can operatively couple to a power grid. The device includes a photovoltaic (PV) stack including series-connected PV modules. Each PV module is associated with a capacitor for storing output of that PV module. A positive terminator circuit switches a negative end of the PV stack to ground during positive half of grid cycle, and a negative terminator switches a positive end of the PV stack to ground during negative half of grid cycle. A connecting branch couples each PV module output to a common bus, each branch including control circuitry configured to selectively couple the corresponding PV module output to bus. During a first half of grid cycle, some of the capacitors discharge to the grid while a balance of the capacitors charge in preparation for discharge during a second half of grid cycle.

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26-04-2012 дата публикации

Power generation system

Номер: US20120099352A1
Автор: Shinichi Motegi
Принадлежит: Yanmar Co Ltd

A power generation system is provided that implements an efficient, labor-saving system interconnection in which an engine generator system, an external power supply system, and a capacitor are connected in parallel to each other, without the conventional practice to change the configuration of the engine generator system or provide an additional circuit. A power generation system implements a system interconnection in which an engine generator system, an external power supply system, and a capacitor are connected in parallel to each other. The power generation system includes discontinuing means for discontinuing direct-current voltage control by which a direct current voltage of the capacitor is controlled when electric power from a generator is supplied to the capacitor while direct current electric power that an external power supply supplies is lower than demand power that a power generation system is supposed to supply.

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03-05-2012 дата публикации

AC Power Systems for Renewable Electrical Energy

Номер: US20120104864A1
Принадлежит: AMPT LLC

A renewable electrical energy power system is provided with aspects and circuitry that can optimize operation of a DC-AC inverter. Alternative electrical energy sources may include solar cells and solar panels. In various embodiments, the system may include solar panel maximum power point independent inverter input optimization photovoltaic power control circuitry, inverter efficiency optimized converter control circuitry, inverter voltage input set point converter output voltage control circuitry, inverter sweet spot converter control circuitry, photovoltaic inverter duty cycle switch control circuitry, substantially power isomorphic photovoltaic inverter input control circuitry, and substantially power isomorphic photovoltaic inverter duty cycle control circuitry. With previously explained converters, inverter control circuitry or photovoltaic power converter functionality control circuitry configured as inverter sweet spot converter control circuitry can achieve extraordinary efficiencies with substantially power isomorphic photovoltaic capability at 99.2% efficiency or even only wire transmission losses.

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03-05-2012 дата публикации

Method of operating an inverter by turning off the switching around a zero transition of the alternating output current

Номер: US20120106222A1
Автор: Christoph Schill
Принадлежит: Diehl AKO Stiftung and Co KG

A method of operating an inverter for converting direct voltage into alternating voltage. The inverter has direct-voltage terminals and alternating-voltage terminals and a plurality of power switching elements that are clocked at high-frequency connected between the d.c. and a.c. terminals. The high-frequency clocking of the power switching elements of the inverter is switched off around a zero transition of the alternating current or the alternating voltage for a period which depends on the direct voltage present at the direct-voltage terminals of the inverter and/or the output power of the inverter. No current is generated during time intervals with a poor efficiency.

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24-05-2012 дата публикации

Hybrid power source

Номер: US20120126619A1
Автор: Harmohan N. Singh
Принадлежит: Honeywell International Inc

A hybrid power system is comprised of a high energy density element such as a fuel-cell and high power density elements such as a supercapacitor banks. A DC/DC converter electrically connected to the fuel cell and converting the energy level of the energy supplied by the fuel cell. A first switch is electrically connected to the DC/DC converter. First and second supercapacitors are electrically connected to the first switch and a second switch. A controller is connected to the first switch and the second switch, monitoring charge levels of the supercapacitors and controls the switching in response to the charge levels. A load is electrically connected to the second switch. The first switch connects the DC/DC converter to the first supercapacitor when the second switch connects the second supercapacitor to the load. The first switch connects the DC/DC converter to the second supercapacitor when the second switch connects the first supercapacitor to the load.

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31-05-2012 дата публикации

Distributed Solar Power Plant And A Method Of Its Connection To The Existing Power Grid

Номер: US20120133207A1
Принадлежит: Sunlight Photonics Inc

Methods and apparatus are provided for using a renewable source of energy such as solar, wind, or geothermal energy. In some embodiments, the method may include generating electric energy from a renewable form of energy at a plurality of locations at which reside an electric power line associated with an electric power grid. The electric energy generated at each location may be transferred to the electric power line to thereby supply electric energy to the electric power grid.

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31-05-2012 дата публикации

Power converting apparatus, grid interconnetion apparatus and grid interconnection system

Номер: US20120134191A1
Автор: Fumiiki Yoneda
Принадлежит: Sanyo Electric Co Ltd

A power converting apparatus comprises a DC-DC converter circuit that steps up or steps down an input voltage from a DC power supply, a DC-AC converter circuit that converts an intermediate voltage outputted by the DC-DC converter circuit to an alternate current, and a control circuit that controls the DC-DC converter circuit and the DC-AC converter circuit. The control circuit is provided with a circuit control unit that controls the DC-DC converter circuit so that the modulation factor, which is the amplitude ratio between a signal wave for manipulating the DC-AC converter circuit and the carrier wave therefor, will become a target modulation factor.

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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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07-06-2012 дата публикации

Ac conversion of varying voltage dc such as solar power

Номер: US20120139346A1
Автор: Jukka Nurmi, Matti Jussila
Принадлежит: ABB Oy

An alternating current conversion method and system are disclosed that can adapt to varying voltages of the direct current sources. An exemplary system includes a first and second connection arrangements for the voltage sources such that the direct current can be supplied to the DC/AC converter selectively in the first connection arrangement or the second connection arrangement. The selection between the first and second connection arrangements is made on the basis of the voltage levels of the voltage sources such that a proper voltage is supplied to the DC/AC converter. The numbers of the voltage sources in the connection arrangements are selected such that the first and second connection arrangements have different numbers of the voltage sources connected in series, the voltage sources being also grouped in parallel groups.

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07-06-2012 дата публикации

Solar photovoltaic system with capacitance-convertibng function

Номер: US20120140533A1
Автор: Sheng-Hua Li
Принадлежит: Delta Electronics Inc

A solar photovoltaic system with a capacitance-converting function provides a DC power source through a solar cell, and the DC power source is converted into an AC power source, thus performing a grid-connected operation with a utility power. The solar photovoltaic system further includes a capacitance conversion apparatus, a DC-to-DC converter, a DC-to-AC converter, and a filter circuit. In addition, the capacitance conversion apparatus has an inductor, a first power switch component, a second power switch component, and a capacitor, which are electrically connected to each other. Instead of the conventional electrolytic capacitor, the capacitor conversion apparatus is used to provide energy-storing, energy-releasing, and filtering functions, thus increasing the operation life of the solar

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07-06-2012 дата публикации

Distributed Grid-Interactive Photovoltaic-Based Power Dispatching

Номер: US20120143384A1
Автор: Julianne F. Haugh
Принадлежит: International Business Machines Corp

In one embodiment, each of a plurality of sites may produce surplus power. All or a fraction of the surplus power may be supplied to the power grid according to an agreement between the user of a site and an electric utility. A computer of the utility is in communication with a computer at each of a plurality of sites having a local power source. Terms of power provision that include an amount of power to be provided during a specified time of day is communicated between a site and the utility.

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07-06-2012 дата публикации

Computing architecture for autonomous microgrids

Номер: US20120143385A1
Автор: Steven Y. Goldsmith
Принадлежит: Sandia Corp

A computing architecture that facilitates autonomously controlling operations of a microgrid is described herein. A microgrid network includes numerous computing devices that execute intelligent agents, each of which is assigned to a particular entity (load, source, storage device, or switch) in the microgrid. The intelligent agents can execute in accordance with predefined protocols to collectively perform computations that facilitate uninterrupted control of the microgrid.

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14-06-2012 дата публикации

Fuel Cell System with Grid Independent Operation and DC Microgrid Capability

Номер: US20120146587A1
Принадлежит: Bloom Energy Corp

A fuel cell system includes grid independent operation with DC microgrid capability. This fuel cell system has a capability of operation with and without the grid, and with DC micro-grid capability.

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14-06-2012 дата публикации

Renewable energy-based electricity grid infrastructure and method of grid infrastructure automation and operation

Номер: US20120150361A1
Автор: Spyros J. Lazaris
Принадлежит: Individual

A renewable energy resource management system manages a delivery of a power requirement from a multi-resource offshore renewable energy installation to an intelligent power distribution network. The installation includes multiple renewable energy resource components and is capable of variably and independently generating power from each to microgrids comprising the intelligent power distribution network so that the entire power requirement is satisfied from renewable energy resources. An electricity grid infrastructure is also disclosed in which power production is balanced with power consumption so that power storage requirements are minimized.

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21-06-2012 дата публикации

Power-generation control apparatus, power-generation control method and power generation system

Номер: US20120153724A1
Принадлежит: Sony Corp

Disclosed herein is a power generation control apparatus including: a power generation efficiency control section configured to control the power generation efficiency of a power generation module for generating electric power in accordance with light received by the power generation module; and a power accumulation control section configured to control power accumulation into the power accumulation section accumulating electric power generated by the power generation module by detecting the power accumulation state of the power accumulation section. When the power generation module is in a state of being capable of generating electric power and if the power accumulation section is in a state of having fully accumulated electric power and if a load connected to the power accumulation section is in a state of consuming no electric power, the power generation efficiency control section controls the power generation module to generate electric power at a low power generation efficiency.

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28-06-2012 дата публикации

Method and system for integral energy management of buildings

Номер: US20120166007A1

An EMM (Energy Monitoring and Management) control system performs energy management of buildings, each building having an EMM client disposed therein. The EMM control system includes an EMM server configured to receive operation information of energy-consuming equipments in the building and information related to energy and environment of the building from the EMM client to perform a function of analyzing/taking statistics/reporting for the operation information, and energy and environment information, an EOM (Energy Optimization and Maintenance) server configured to derive an optimum energy operation program through energy evaluation index and simulation from the information provided from the EMM client and providing the optimum energy operation program to the EMM client.

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12-07-2012 дата публикации

Power dispatch system for electrolytic production of hydrogen from wind power

Номер: US20120175954A1
Принадлежит: Next Hydrogen Corp

A system for distributing medium voltage DC electric power from a wind farm to electrolyser modules requiring low voltage DC power. The system includes one or more of each of central step down DC-DC converters, DC buses, regulated DC-DC converters, respective electrolyser module controllers, dispatch controllers, alternative loads, and alternative power sources.

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12-07-2012 дата публикации

Starting up a dc/dc converter having a high-frequency transformer

Номер: US20120176816A1
Принадлежит: SMA Solar Technology AG

During startup of a DC/DC converter having a high-frequency transformer whose primary winding is supplied with current from an input-side DC link via an inverter bridge having pulsed switches and whose secondary winding is used to charge an output-side DC link via a rectifier bridge. The switches of the inverter bridge are operated to load the output-side DC link, in a manner that deviates from a normal operation of the switches in order to limit the currents that flow in the DC/DC converter during startup of the DC/DC converter. Particularly, the switches of the inverter bridge are operated during startup of the DC/DC converter at a pulse width that is fixed during each of a limited number of stages of the startup, and have a duty cycle that is not more than 5 percent during each of the stages of the startup.

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26-07-2012 дата публикации

Power distribution system

Номер: US20120188806A1
Принадлежит: Panasonic Corp

A power distribution system includes a DC-DC converter which outputs a DC power after converting the DC power outputted from a DC power source to a desired voltage level. In the power distribution system, the DC-DC converter is controlled so as to operate only when the input voltage falls in a predetermined range.

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26-07-2012 дата публикации

Electric power management system

Номер: US20120191263A1
Автор: Kenji Kuniyosi
Принадлежит: Panasonic Corp

An electric power management system includes a power meter connected to a power system of a commercial power source and a power conditioner connected to the power meter, a power generating device and an electric appliance. The power meter and the power conditioner are configured to exchange power information through a communications part at the side of the power meter.

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09-08-2012 дата публикации

Energy management system using hydraulic compensator for the production of electricity from one or several networks of cynetic energy sources

Номер: US20120198829A1
Автор: Francois Gagnon
Принадлежит: Individual

The present invention is relates to the production of electricity by the integration of a network of kinetic energy sources. The purpose of the propose embodiments is to convert a plurality of energy sources of different potential to one hydraulic source that will be leveled by hydraulic compensator. The objective is to offer a stable electricity source. All the incoming fluids are joint in a unique energy flow prior to the hydraulic motors that gone to drive the generators. The incoming fluid is regulate at constant pressure and flow to the hydraulic motor, the incoming variation of flow and pressure is regulate by and hydraulic compensator. The generator is drive by a network of hydraulic motors that can supply many levels of power with the same rotation speed. The rotation of the main shaft that joint the hydraulic motors and the electric generator is keep constant by a flywheel equip with an electronic micro break. The electricity production is done by a network of generator that will deliver to the grid a synchronize current with fix voltage.

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09-08-2012 дата публикации

Battery management system, method of removing polarization voltage of battery, and estimating state of charge of battery

Номер: US20120200264A1
Принадлежит: Samsung SDI Co Ltd

A battery management system according to an exemplary embodiment of the present invention includes: a current measuring unit for sampling a charge current and a discharge current of a battery; a charge and discharge amount calculator for calculating a charge and discharge amount corresponding to a difference between the sampled charge current and the sampled discharge current; a polarization voltage calculator for calculating a polarization voltage corresponding to the charge and discharge amount and a temperature of the battery; and a pulse generator for applying a polarization voltage reset pulse for the battery to remove the polarization voltage.

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16-08-2012 дата публикации

Regenerative braking safety system and method of use

Номер: US20120206071A1
Принадлежит: Beckman Coulter Inc

A centrifuge includes a regenerative braking safety system including an electrical system reversibly coupled to a power source. A motor is coupled to the electrical system. The motor is capable of driving a rotor using power delivered through the electrical system, and is further capable of supplying the electrical system with recovered energy. The recovered energy is electrical energy converted from kinetic energy of the rotor during regenerative braking of the motor. The safety system includes a power cut-off configured to disable the effect of regenerative braking of the motor when the electrical system is decoupled from the power source.

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30-08-2012 дата публикации

Power regulating system for solar power station

Номер: US20120217807A1
Принадлежит: SKYTRON ENERGY GMBH

The invention relates to a system for the dynamic regulation of a regenerative energy generation installation comprising a plurality of energy generation units. Said system has a signal input for receiving a pre-determined set value, a measuring device for measuring an actual value on an output of the energy generation installation, and a regulating device for regulating the energy generation units based on the set value and the measured actual value.

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30-08-2012 дата публикации

Mobile power system

Номер: US20120218687A1
Автор: Eldon Prax, Stan Waldrop
Принадлежит: Sundial Power Pods LLC

A mobile power system comprises a plurality of energy sources, wherein at least one energy source is a solar powered generating device and at least one energy source is a wind powered generating device; a plurality of electronic and telecommunications components configured to receive the power generated by the plurality of energy sources and/or convert the power generated to direct current power; a plurality of batteries configured to store the direct current power; and at least one transportable housing configured to hold the plurality of energy sources, the plurality of electronic and telecommunications, and the plurality of batteries during transport of the housing, and wherein the housing is configured to remotely operate the at least one solar powered energy device and the at least one wind powered generating device when the mobile power system is in operation.

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06-09-2012 дата публикации

Method and device for stabilizing network operation of a power supply network

Номер: US20120223577A1
Автор: Bernhard Beck
Принадлежит: ADENSIS GMBH

For network stabilization of an electric power supply network, the voltage at a first network connection point at a first voltage level to a power generator, and at a second network connection point to a second voltage level, as well as at at least one third network connection point to a load, are each sensed as a voltage measurement, wherein a reactive power draw or a reactive power delivery by the power generator is ascertained using a linkage of the voltage measurements with the geographic location of the relevant network connection point.

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13-09-2012 дата публикации

Connecting a Photovoltaic Array at a High Open Circuit Voltage

Номер: US20120228951A1
Автор: Reinhard Lehmann
Принадлежит: SMA Solar Technology AG

For connecting a PV array via an inverter to an AC power grid, at first a DC link at the input side of the inverter is pre-charged from the AC power grid. A link voltage of the DC link is adjusted to a pre-set value with the inverter connected to the AC power grid, the pre-set value being lower than an open circuit voltage of the PV array, and then the PV array at its open circuit voltage is directly connected to the DC link, while the link voltage is continuously adjusted to the pre-set value.

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13-09-2012 дата публикации

Customized Electric Power Storage Device for Inclusion in a Collective Microgrid

Номер: US20120232709A1
Принадлежит: Sandia Corp

An electric power storage device is described herein, wherein the electric power storage device is included in a microgrid. The electric power storage device has at least one of a charge rate, a discharge rate, or a power retention capacity that has been customized for a collective microgrid. The collective microgrid includes at least two connected microgrids. The at least one of the charge rate, the discharge rate, or the power retention capacity of the electric power storage device is computed based at least in part upon specified power source parameters in the at least two connected microgrids and specified load parameters in the at least two connected microgrids.

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20-09-2012 дата публикации

Energy storage system

Номер: US20120235625A1
Автор: Kiyotaka Takehara
Принадлежит: Panasonic Corp

In an energy storage system, power from at least one of a solar cell, a commercial AC power source, and a storage battery is supplied to load devices. In the daytime, under the condition that an amount of power generated by the solar cell is less than an amount of power consumed by the load device, the discharge from the storage battery to the load device is permitted or prohibited if the charge level of the storage battery is higher or is not higher than the reference charge level. The discharge from the storage battery which makes the charge level of the storage battery lower than the reference level is permitted at night.

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27-09-2012 дата публикации

Voltage setting device, photovoltaic power generation system, and control method of voltage setting device

Номер: US20120242303A1
Принадлежит: Omron Corp

An output converter includes a DCDC conversion section, a secondary side voltage/current monitoring section detecting a power from the DCDC conversion section, a maximum operation point control section determining what voltage is to be set by the DCDC conversion section so that the power detected by the secondary side voltage/current monitoring section is maximum, a DCDC short-circuit switch via which a current from a module bypasses the DCDC conversion section to outside, a primary side voltage/current monitoring section measuring the current from the module, a module short-circuit switch switching between a state where a secondary side cathode and a secondary side anode are short-circuited and a state where they are not short-circuited, the maximum operation point control section causing the DCDC short-circuit switch and the module short-circuit switch to switch.

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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
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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04-10-2012 дата публикации

Battery system and energy storage system including the same

Номер: US20120249078A1
Автор: Jae-Soon Kim, Jin-Hong An
Принадлежит: Samsung SDI Co Ltd

A battery system and an energy storage system including a battery module. The battery system includes at least one battery module that may perform charging and discharging, and a battery management unit that controls the charging and the discharging of the battery module. The battery management unit varies a charge limit value for stopping the charging of the battery module and a discharge limit value for stopping the discharging of the battery module. Accordingly, a lifetime of the battery module is extended.

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04-10-2012 дата публикации

System and Method for Local String Management Unit

Номер: US20120253541A1
Принадлежит: Tigo Energy Inc

Apparatuses and methods include a solar array having one or more strings of series-connected local management units (LMUs). Each LMU is parallel-connected to one of a plurality of solar modules. The strings are connected in parallel via a parallel bus. Local string management units (LSMUs) can increase or decrease an output voltage of the solar array by upconverting or downconverting string output voltages from each string. LSMUs can also operate in a bypass mode to increase overall power output.

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11-10-2012 дата публикации

Enhanced Systems and Methods for Using a Power Converter for Balancing Modules in Single-String and Multi-String Configurations

Номер: US20120255591A1
Принадлежит: Tigo Energy Inc

Apparatuses and methods include a solar array having one or more string buses of series-connected solar modules. The current outputs from the solar modules on each string bus can be balanced along with the voltage output from the string buses. Local management units coupled between the solar modules and the string buses are configured to control the voltage output from each solar module. When the solar modules on each string are balanced, and when the string buses are balanced (or before the solar modules and string buses are balanced), an inverter or other device connected to the solar array can find the array's maximum power point via a maximum power point tracking algorithm.

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11-10-2012 дата публикации

Integrated Expandable Grid-Ready Solar Electrical Generator

Номер: US20120256490A1
Автор: Yongchun ZHENG
Принадлежит: Individual

The generator of the present invention is a complete 220V or 120V AC solar electrical generator that is ready to be directly connected to utility power grid, and more than one of the generators can be connected in parallel to power the grid or to power an isolated electrical system. The generator is integrated with a solar panel that converts solar energy into electrical energy, a Max Power Point Tracking (MPPT) controller that dynamically adjust the output power of the generator to maximize the power of the solar energy, a high efficiency low harmonic digital signal process (DSP) technology based synthetic DC to AC converter that provides 220V or 120V AC power, a synchronizing controller that enables the generator to be connected to the utility power grid or connected to other generators, a power factor compensation unit that reduces the reactive power to improve power quality, a protection unit to prevent the generator from hazardous accident, an energy meter that measures the energy generated by the solar panel and the energy feed into the utility power grid, and a communication unit that sends the parameters such as the voltage, the current, the temperature of the solar panel, the efficiency and related data of MPPT, the timing of AC power and the other information about the generator to the other generators and central controller and receives the information and control commands from the other generators and central controller through AC wire or wirelessly. The generator can be optionally to be equipped with proper battery for some isolated applications.

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18-10-2012 дата публикации

Solar generation method and system

Номер: US20120262960A1
Принадлежит: Acciona Energia SA

The invention describes a solar generation method by means of a system ( 1 ) comprising a set of solar cells ( 2 ) connected to an inverter ( 4 ) that transmits the energy generated to an electrical network ( 6 ), which comprises controlling the active and reactive power that the system ( 1 ) transmits to the electrical network ( 6 ) by controlling the voltage (V cell ) of the cells ( 2 ) and the output current (I inv ) of the inverter ( 4 ), such that: in a first mode of operation, the voltage (V cell ) of the cells ( 2 ) provides the maximum active power in accordance with the operating conditions; and, in a second mode of operation, the voltage (V cell ) in the cells ( 2 ) is different from the voltage that provides the maximum active power, generating an active power that is lower than the maximum, in order to optimise the integration of the solar generation system ( 1 ) into the electrical network ( 6 ).

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25-10-2012 дата публикации

Idealized solar panel

Номер: US20120268087A1
Автор: Kent Kernahan
Принадлежит: Individual

A solar panel is constructed by electrically connecting one or more banks of solar cells in series, wherein each cell in each bank is electrically connected in series. In some aspects the cells are a quarter of typical full size cells in the direction of current flow. A module senses and controls small signal conduction and total conduction of the panel such that reverse current conduction of a weak or partially shaded cell is prevented, thereby allowing the panel to be constructed without bypass diodes. In some aspects the module prevents damage to the panel by an external inverter's maximum power point experiments; in other aspects the module itself provides maximum power point control.

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29-11-2012 дата публикации

Method and apparatus for controlling a dc-transmission link

Номер: US20120300510A1
Принадлежит: SIEMENS AG

A method for controlling a DC-transmission link for transmitting electric power from a power production unit connected to an AC-DC converter at a first side of the DC-transmission link to a utility grid connected to a DC-AC converter at a second side of the DC-transmission link is provided. The method includes: obtaining a DC voltage signal indicative of a DC voltage at the DC transmission link; controlling the AC-DC converter such that an AC voltage at an AC side of the AC-DC converter is adjusted based on the DC voltage signal. Further, an apparatus for controlling a DC-transmission link is provided.

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06-12-2012 дата публикации

Method of operating a maximum power point tracker

Номер: US20120310436A1
Автор: Soren Baekhoj Kjaer
Принадлежит: Danfoss Solar Inverters AS

The present invention relates to a method of operating a maximum power point tracker comprising the steps of performing a sweep cycle at intervals, the sweep cycle comprising the determination of at least one first parameter of a power function, storing the at least one first parameter and at least one second parameter and, based on the data so stored, modifying one or more characteristics of the sweep cycles. The invention also relates to a maximum power point tracking apparatus comprising a controller ( 12, 115 ) suitable for controlling an operating parameter, an input ( 4, 104 ) connected to a power source ( 3, 103 ) and a data store ( 15, 115 ), which apparatus is suitable for being operated by the above method.

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06-12-2012 дата публикации

Energy display system

Номер: US20120310560A1
Автор: Daijiro Ozaki
Принадлежит: Misawa Homes Co Ltd, Toyota Motor Corp

The present invention provides an energy display system, comprising a first electric power detection device that can detect the power consumption of grid power, a second electric power detection device that can detect the power consumption of electric power generated by a solar electric power generation device, third electric power detection devices that can detect the power consumption of household electric loads on the basis of grid power and generated power respectively, a fourth electric power detection device that can detect the power consumption resulting from charging of a traveling object on the basis of grid power and generated power respectively, and a display device that is connected with the first through fourth electric power detection devices and can display the power consumption detected by those electric power detection devices; hence, the power consumption due to the household electric loads and power consumption resulting from charging of the traveling object can be displayed on the basis of grid power and generated power respectively.

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13-12-2012 дата публикации

Solar system for generating electric power

Номер: US20120313440A1
Автор: Boris Watelmacher
Принадлежит: Solar Wat Ltd

A solar power generation system for providing operating power for a desired application, the system includes one or more solar-array modules, wherein each of the one or more solar-array modules includes a multiplicity of solar cells and a high efficiency DC to DC power converter. The multiplicity of solar cells is arranged in strings of serial-units electrically connected in parallel to form a crisscross matrix array of solar cells, which matrix allows currents to bypass malfunctioning cells, thereby improving the performance of the system. The power converter includes fast MOSFET transistors having duty cycle that is operationally constant and is almost 50%. Optionally, the power converter includes a plus conductive pad and a minus conductive pad, wherein each of the strings of serial-units is individually wired to the plus conductive pad and the minus conductive pad.

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13-12-2012 дата публикации

Power-supply system, power-supply device and power-supply method

Номер: US20120313567A1
Автор: Kuniyoshi Ichikawa
Принадлежит: Next One Create Ltd

A plurality of power-supply devices, in which power generated by solar energy is stored, are allowed to exchange power among themselves. Power generated by a solar panel connected to a first power-supply device is stored in a power storage section of the first power-supply device. Power supplied by the second power-supply device, which has a power storage section for storing power generated by the solar panel, is stored in the power storage section of first power-supply device. Power stored in the power storage section of the first power-supply device is supplied externally.

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13-12-2012 дата публикации

Fuel Cell Bypass Diode Structures and Attachment Methods

Номер: US20120315509A1
Принадлежит: Bloom Energy Corp

A fuel cell system includes a fuel cell stack which includes a plurality of fuel cells contacted in series by a plurality of interconnects. The various embodiments provide systems and methods for coupling a fuel cell stack with an electric bypass module within a hot zone. The bypass module may include elements for conducting a current between interconnects in a fuel cell stack and thereby bypass a failed fuel cell that has become a resistive parasitic load.

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13-12-2012 дата публикации

Method for Controlling the State of Charge of an Electrical Energy Store

Номер: US20120316719A1
Принадлежит: Bayerische Motoren Werke AG

For controlling the charge state of a battery in a hybrid vehicle having an internal-combustion engine and an electric machine, the battery is operated in a working state-of-charge range falling within a theoretically possible state-of-charge range. In a first sub-range, the battery is charged by the electric machine, the electric machine working as a generator and being engine driven. In a second sub-range, the battery is neither charged nor discharged, the electric machine working as a generator and being driven by the engine and, in the process, supplying only an on-board power supply system of the hybrid vehicle with current. In a third sub-range, the battery is discharged and, in the process, supplies the on-board power supply system with current, the electric machine running along passively. In a fourth sub-range, the battery is discharged and, in the process, supplies current to the electric machine operating as an electric motor.

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20-12-2012 дата публикации

Power Shuffling Solar String Equalization System

Номер: US20120319489A1
Принадлежит: Draker Inc, Solar Power Technologies Inc

A photovoltaic (PV) array system may include multiple PV strings, each PV string including respective PV panels coupled in series. Each PV string may be coupled in series with a first terminal of a respective string equalizer module. The string equalizer module may equalize a maximum power-point voltage (V MP ) of the PV string before the PV strings combine to produce a single, composite DC bus voltage on a DC bus. To accomplish this, each string equalizer module may generate a respective adaptive string equalizer output voltage at its first terminal to tune a respective PV string voltage of its corresponding respective PV string to have the V MP of its corresponding PV string match respective V MP 's of other PV strings. That is, PV strings may sink or source power from/to other PV strings, to equalize the V MP of each corresponding respective PV string.

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20-12-2012 дата публикации

Parallel Connected Inverters

Номер: US20120319490A1
Принадлежит: Solaredge Technologies Ltd

A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter autonomously determines its share of power conversion. Each power converter operates according to its own power conversion formula/function, such that overall the parallel-connected converters share the power conversion load in a predetermined manner.

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20-12-2012 дата публикации

Power Inverter with Multi-Fed On-Board Power Supply

Номер: US20120319495A1
Принадлежит: SMA Solar Technology AG

An inverter includes a DC/AC converter connectable to a DC power grid, at least one DC/DC converter arranged upstream of the DC/AC converter and providing a galvanic isolation, and a DC voltage link at the input of the at least one DC/DC converter and connectable to at least one DC power source. The inverter also includes at least one further DC voltage link which is galvanically isolated from the first DC voltage link by the DC/DC converter, on-board voltage rails supplying a controller and other auxiliary devices of the inverter with electric energy; and an on-board supply unit. The on-board supply unit is configured and adapted to feed the electric energy into the on-board voltage rails both out of the first DC voltage link and out of the at least one further DC voltage link.

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20-12-2012 дата публикации

Power converter bus control

Номер: US20120320641A1
Автор: Patrick L. Chapman
Принадлежит: Solarbridge Technologies Inc

Processes, machines, and articles of manufacture that may management power conversion as provided. This may include circuit topology or management that serves to improve power conversion efficiency from a DC waveform to an AC waveform. This circuit topology or management may include considering and managing the voltage across a DC-link capacitive bus and the phase angle output of an AC waveform in order to influence or improve power conversion characteristics or efficiency.

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27-12-2012 дата публикации

Parallel electric service system and method using meter socket and load center combination

Номер: US20120326518A1
Принадлежит: Siemens Industry Inc

A parallel electric service system including a combination load center is disclosed. More particularly, the parallel electric service system encompasses a combination load center adapted to receive power from a utility power source and a parallel power source such as a solar module, wind turbine, fuel cell, or the like. Power may be supplied to electrical loads of branches of the system by the utility power source, parallel power source, or both. The system also provides electrical usage metering and allows electrical power to flow back to the grid. Methods of connecting parallel power sources in the parallel electric service system are provided, as are other aspects.

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27-12-2012 дата публикации

Systems and Methods for Operating a Solar Direct Pump

Номер: US20120326649A1
Принадлежит: Solar Semiconductor Inc

Systems and methods for operating a solar direct pump are provided. A system for controlling an alternating current (AC) pump includes a photovoltaic module, a temperature sensor that measures a temperature of the photovoltaic module, a calculator that calculates a maximum power point (MPP) voltage of the photovoltaic module based on the temperature of the photovoltaic module, and a frequency controller that adjusts a reference frequency of power supplied to the pump based on the MPP voltage.

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03-01-2013 дата публикации

Electrical distribution system

Номер: US20130002014A1
Принадлежит: Rolls Royce PLC

An electrical generating system for aircraft with one or more engines includes a plurality of generators associated with the engines so as to produce respective AC outputs. The frequencies of these outputs can differ from each other, as a result of differing engine speeds and/or deliberate design, but they are to be connected to a common bus to avoid redundancy of wiring. One or more converters are present between the generators and the bus for adjusting the output frequency of the generators to provide an AC output voltage at a common bus frequency. The system includes a control system for setting the AC bus frequency in such a way that it can vary with time. The bus frequency may follow the natural frequency of the engine, and only small converters are needed to make the already approximately equal generator frequencies identical, so that they can all feed the common bus.

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10-01-2013 дата публикации

Photovoltaic arrangement

Номер: US20130009478A1
Автор: Bernhard Beck
Принадлежит: ADENSIS GMBH

An arrangement with a photovoltaic generator is provided that can be connected to the input of a power inverter, the output of which is connected to a supply network. The arrangement further comprises an asynchronous machine parallel to the output of the power inverter, which asynchronous machine is driven by an internal combustion engine.

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10-01-2013 дата публикации

Method for controlling a power converter in a wind turbine generator

Номер: US20130010505A1
Принадлежит: Vestas Wind Systems AS

A method for controlling a power converter in a wind turbine generator, the power converter being connected to a power grid, the method comprising obtaining an alternating current (AC) line voltage at a connection point between the power converter and the power grid, obtaining a frequency of the power grid based on the AC line voltage, dynamically adapting the AC line voltage to the frequency of the power grid, generating a reference signal based on at least the frequency-adapted AC line voltage, and determining a converter control signal to be provided to the power converter based on the reference signal and the grid frequency in order to generate a power at the frequency of the power grid. Further, a wind turbine generator implementing the method is provided.

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17-01-2013 дата публикации

Distributed inverter and intelligent gateway

Номер: US20130015710A1
Принадлежит: Enphase Energy Inc

A system and apparatus for generating power. In one embodiment, the apparatus comprises a power module for coupling to a DC power source via a DC bus, wherein the power module (i) converts a first power from the DC power source to a second power, and (ii) comprises a maximum power point tracking module unit for dynamically adjusting a load voltage of the DC power source; an AC bus; and a controller, physically separate from the power module and coupled to the power module via the AC bus, for operatively controlling the power module.

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17-01-2013 дата публикации

System and Method for Using Capacitors in Wireless Networks

Номер: US20130015807A1
Принадлежит: BATTERY FREE OUTDOORS LLC

A battery-free wireless network is provided with one or more series or parallel capacitive networks. One or more solar panels are used to charge the capacitive networks and one or more charging circuits are used to control the charging of the capacitive networks. One or more DC-DC converters maybe used to provide a voltage to a wireless router, switch or other network device, the timer/clock circuitry, and a user interface. In those instances when it is desired that the timer/clock circuitry remain powered at all times, the timer/clock circuitry is preferentially preserved at the expense of the network device such that if, for any reason, the capacitive network is drained after running the network device, there will still be sufficient power stored in the capacitive network to maintain the timer/clock circuitry.

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17-01-2013 дата публикации

Real-time photovoltaic power plant control system

Номер: US20130018516A1
Принадлежит: First Solar Inc

A real-time photovoltaic power plant control system and method of control for plant output, voltage regulation and/or power factor regulation. The system comprises a grid interface controller configured to receive power information from a power grid and provide commands for controlling at least one active or reactive power supplied to the power grid, a power plant controller configured to receive commands from the grid interface controller for and direct real-time output of the power plant, a plurality of local controllers connected to and controlled by the power plant controller, and a plurality of inverters each connected to supply power from at least one photovoltaic device to the power grid and arranged such that each local controller is connected to and controls at least one inverter, the inverters reporting status information in real-time back to the local controllers, and the local controller reporting status information in real-time back to the power plant controller.

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24-01-2013 дата публикации

Energy Generation System Using Underwater Storage of Compressed Air Produced by Wind Machines

Номер: US20130019591A1
Автор: Herbert L. Williams
Принадлежит: Individual

An offshore floating wind farm producing compressed air in varying quantities depending on the wind speed, the compressed air being delivered to a large-volume, thin-walled, underwater storage bladder or tank, the compressed air then being delivered to an electricity-generating power plant to power generators as needed. The system may also include an onshore wind farm that produces compressed air in varying quantities depending on wind speed, the compressed air being delivered directly to the power plant. When compressed air production exceeds the needs of the power plant, the excess compressed air is delivered to the underwater storage tank. When onshore production is inadequate, compressed air is brought from the underwater storage tank to the power plant.

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07-02-2013 дата публикации

Networked Solar Panels and Related Methods

Номер: US20130035801A1
Автор: FANG Xu
Принадлежит: FANG Xu

Disclosed is a system of networked PV panels for improved provision of electricity to the power grid.

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14-02-2013 дата публикации

Power supply apparatus activating method

Номер: US20130038120A1
Принадлежит: Honda Motor Co Ltd

The two ends of a battery circuit ( 18 ), in which a first power supply ( 11 ) is connected in series to a second power supply ( 12 ), are connected to the respective first and third lines (L 1 and L 3 ), while a junction ( 18 a ) between the first power supply ( 11 ) and the second power supply ( 12 ) is connected to a second line (L 2 ). The two ends of a switching circuit ( 33 ) are connected to the respective first and third lines (L 1 and L 3 ). An end of a reactor ( 34 ) is connected to a junction between first and second switching elements ( 31 and 32 ), while the other end of the reactor ( 34 ) is connected to the second line (L 2 ). The power supply apparatus ( 10 ), when activated, executes an operation in which, while the ON state of the first switching element ( 31 ) is inhibited, only the second switching element ( 32 ) is alternately turned ON and OFF with the ON state duration changed such that the ON state duration has a tendency to become longer. Thereafter, the power supply apparatus ( 10 ) executes an operation in which the switching elements ( 31 and 32 ) are alternately turned ON.

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14-02-2013 дата публикации

Photovoltaic Array Systems, Methods, and Devices with Improved Diagnostics and Monitoring

Номер: US20130038129A1
Принадлежит: Ideal Power Converters Inc

Devices, systems and methods for operating, monitoring and diagnosing photovoltaic arrays used for solar energy collection. The system preferably includes capabilities for monitoring or diagnosing an array by automatically disconnecting portions of the array during normal service (when load is not maximum, and observing the resulting change in electrical characteristics. More intensive diagnostic procedures can be launched if needed. One embodiment provides for performing monitoring or diagnostic operations on the array in daylight or at night. Another embodiment allows monitoring or diagnostic operations to be performed on a portion of the array while other parts of the array continue to collect energy. Yet another embodiment provides a safety mode for an array for maintenance or during emergencies.

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14-02-2013 дата публикации

Wind farm and method for operating a wind farm

Номер: US20130038133A1
Автор: John Bech
Принадлежит: SIEMENS AG

A wind farm is described which includes a collector grid and a wind turbine being connected to the collector grid. The wind turbine includes a wind turbine transformer, and a wind turbine transformer bypass switch. Further disclosed is a method for operating a wind farm. The method includes measuring a collector grid voltage, and bypassing a wind turbine transformer if the measured collector grid voltage is below a first predetermined threshold voltage.

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14-03-2013 дата публикации

Low Profile Power Conversion System for Rooftop Photovoltaic Power Systems

Номер: US20130062958A1

The disclosed embodiments and principles provide a way to integrate high-efficiency, low-profile power electronics with localized maximum power point tracking (MPPT) into a rooftop shingle-based photovoltaic power system. DC-DC power converters having a height, or profile, as low as ¼ inch for a 200 W power output, are able to be included in a building-integrated photovoltaic (BIPV) roof shingle. The DC-DC power converters increase the relatively low voltage produced by two rows of series-connected photovoltaic shingles, each including photovoltaic cells, to a high voltage used by a DC-AC inverter. For example, DC-DC power converter increases the voltage produced by two rows of series-connected photovoltaic shingles from several tens of volts to approximately 400 volts. Thus, the DC-DC power converters provide a large voltage step-up using a low profile and with very high efficiency.

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21-03-2013 дата публикации

Power supply aging system and load balance control method

Номер: US20130069666A1
Автор: Hon Ki Wong
Принадлежит: Individual

A power supply aging system and a load balance control method. The power supply aging system includes: a system share supply unit ( 201 ) for producing a DC voltage for the need of the system constant current balance, a renewable load unit ( 202 ) for converting a low DC voltage outputted by a unit under test ( 200 ) to a high DC voltage, a DC to AC converting unit ( 203 ) for converting the high DC voltage to the AC voltage needed by the unit under test. The AC voltage is transmitted to the unit under test through a renewable AC bus. The system does not need any isolation transformer or the authorization from power supplying enterprises. The system can balance the DC load sharing, reduce the cost, improve the efficiency of electrical energy feedback and reduce the energy waste.

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21-03-2013 дата публикации

System and methods for renewable power notifications

Номер: US20130073105A1
Принадлежит: General Electric Co

Systems and methods relating to renewable power notifications to alert consumers when renewable power becomes more available are provided. Specifically, renewable power generation may depend on changing conditions such as weather. As such, a system according to the present disclosure may involve a network interface and a processor, the network interface receiving a message relating to renewable power generation and sending a renewable power notification to a consumer. The processor may run a system that includes a component to detect renewable power availability based at least in part on the message, a component to determine whether to issue the renewable power notification to the consumer based at least in part on the availability of the renewable power generation, and a component to cause the network interface to issue the renewable power notification to the consumer.

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28-03-2013 дата публикации

Systems and methods for microgrid power generation and management

Номер: US20130076140A1
Принадлежит: Individual

Systems and methods for coordinating selective activation of a multiplicity of emergency power generation equipment over a predetermined geographic area for distribution and/or storage to supply a microgrid of electrical power for a substantially similar geographic area.

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28-03-2013 дата публикации

Systems and methods for optimizing microgrid power generation and management with predictive modeling

Номер: US20130079939A1
Принадлежит: Individual

Systems and methods for coordinating selective activation of a multiplicity of emergency power generation equipment over a predetermined geographic area for distribution and/or storage to supply a microgrid of electrical power for a substantially similar geographic area.

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28-03-2013 дата публикации

Method and system for operating a power generation and delivery system

Номер: US20130079945A1
Принадлежит: Individual

A method for controlling operation of a power generation and delivery system while increasing a power output of the power generation and delivery system is described. The method includes, monitoring an output parameter of the power generation and delivery system and determining a rate of change of the output parameter as a function of time. A reactive current command signal is generated a as a function of the determined rate of change of the output parameter. Operation of a power converter is controlled based at least partially on the reactive current command signal to facilitate maintaining a substantially constant terminal voltage as the power output of the power generation and delivery system is increased.

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04-04-2013 дата публикации

Energy adjustor

Номер: US20130082531A1

An energy adjustor coupled between a fuel cell group and a secondary battery group is disclosed. A load is coupled to the secondary battery group in parallel. The energy adjustor includes a boost regulation module, a drop regulation module, a detecting module and a control module. The boost regulation module boosts an output voltage of the fuel cell group to generate a first adjustment voltage according to a first control signal. The drop regulation module drops the first adjustment voltage to generate a second adjustment voltage to the load according to a second control signal. The detecting module detects at least one of the fuel cell group, the boost regulation module, the drop regulation module and the load to generate a detection result. The control module generates the first and the second control signals according to the detection result.

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04-04-2013 дата публикации

Systems and methods for delivering power in response to a connection event

Номер: US20130082533A1
Автор: Dennis Hicks
Принадлежит: FREESCALE SEMICONDUCTOR INC

Systems and methods are provided for delivering power from a first energy source to a second energy source. An electrical system for delivering power from a first energy source to a second energy source comprises an interface configured to be coupled to the second energy source, a switching element coupled between the first energy source and the interface, and a processing system coupled to the switching element and the interface. The processing system is configured to identify a connection event based on an electrical characteristic of the interface that is indicative of the interface being coupled to the second energy source and operate the switching element to provide a path for current from the first energy source in response to identifying the connection event.

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18-04-2013 дата публикации

Hydrogen production system for controlling the power output of power stations based on renewable energhy sources and control process

Номер: US20130093194A1
Принадлежит: Acciona Energia SA

It stands out mainly for consisting of a nested configuration of electrolysis units ( 5 ), independently operated, the power output values of which are descendant in such a manner that, for any unit of the system, the sum of the power output values of the smaller electrolysis units ( 5 ) is always greater than or equal to the “dead band” (DB) of said units, allowing reduction of the dead band of said hydrogen production system ( 4 ) to negligible levels, avoiding loss or discharge of the energy generated in said renewable power stations, preferably one or several wind farms ( 2 ) formed by a group of wind turbines ( 1 ), connected to the power grid ( 3 ) as a consequence of the implementation of a primary control service therein or, in general, of any other active power control service, thereby optimising the total energy obtained.

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25-04-2013 дата публикации

Energy Management Method and System, and Computer Readable Storage Medium for Storing the Method

Номер: US20130099564A1
Принадлежит: INSTITUTE FOR INFORMATION INDUSTRY

An energy management method is provided. The energy management method comprises the steps of retrieving load information from at least one load and retrieving energy-supplying information from an energy supply system having a grid power source, a renewable energy generation module and an energy storage module to instantly calculate first and second energy thresholds. When an energy production of the renewable energy generation module is smaller than the second energy threshold, the grid power source or the energy storage module is controlled to supply energy to the load. When the energy production is between the first and the second energy thresholds, the renewable energy generation module is controlled to supply energy to the load. When the energy production is larger than the first energy threshold, the renewable energy generation module is controlled to supply energy to the load and charge the energy storage module.

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25-04-2013 дата публикации

Disconnect switch for distributed energy system

Номер: US20130099566A1
Принадлежит: Thomas and Betts International LLC

A switching assembly includes a first terminal and a second terminal, a first switch connected to the first terminal, and a second switch connected to the second terminal. The switching assembly further includes a rectifier bridge connected between the first switch and the second switch, and a third switch connected between the first terminal and the second terminal. The switching assembly also includes a control unit that selectively opens and closes the first switch, the second switch and the third switch, and selectively turns on and off the rectifier bridge.

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25-04-2013 дата публикации

Thermally Efficient Power Conversion Modules for Space Solar Power

Номер: US20130099599A1
Принадлежит: US Department of Navy

A space solar power system that has sun-tracking curved reflectors, such as off-axis parabolic reflectors, a secondary reflector, and a power conversion module for converting the sunlight into microwave energy and transmit the energy to remote locations. The power conversion module can have a modular stepped conical shape, with additional radiator area configured in vertical sidewalls, horizontal radiator panels, or both. Hinged, fold-out units can house the microwave conversion electronics and the antenna for transmitting the microwave radiation to the remote ground station.

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16-05-2013 дата публикации

Connecting an Inverter in a Solar Power Plant with Shifted Potential Center Point

Номер: US20130121029A1
Принадлежит: SMA Solar Technology AG

The invention relates to a process of connecting an AC output of a transformerless inverter of a solar power plant to an internal AC power grid at an input side of a galvanic isolation, while an offset voltage for shifting a potential center point of a photovoltaic generator connected to the inverter is applied. The process includes: (i) synchronizing the inverter with the power grid; (ii) essentially matching a potential center point of the current-carrying lines of the AC output and a potential center point of the power grid, while only one of the potential center points of the current-carrying lines and the power grid is yet shifted by the offset voltage; and (iii) galvanically connecting all current-carrying lines of the AC output with the power grid only after the steps of synchronizing and essentially matching.

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30-05-2013 дата публикации

System and method for converter switching frequency control

Номер: US20130134710A1
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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30-05-2013 дата публикации

Control device and control method, power generation device and power generation method, power storage device and power storage method, and power control system

Номер: US20130134922A1
Автор: Yuto Takagi
Принадлежит: Sony Corp

The present invention relates to a control device and a control method, a power generation device and a power generating method, a power storage device and a power storing method, and a power control system that are capable of using generated electric power with higher efficiency. A controller ( 110 ) acquires information relating to a power storage state and the like from each power storage device ( 130 ) and determines a power transmission source and a power transmission destination of electric power generated by a power generation device ( 120 ), for example, as denoted by white arrows based on the information. The controller ( 110 ) supplies a power transmission instruction including information of the power transmission destination to the power generation device ( 120 ) as the power transmission source and supplies a power reception instruction including information of the power transmission source to the power storage device ( 130 ) as the power transmission destination. The power generation device ( 120 ) and the power storage device ( 130 ) perform power transmission and power reception based on the instructions. The present invention can be applied to, for example, a power generation device.

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06-06-2013 дата публикации

Control system for a wind park

Номер: US20130140817A1
Автор: Bo Yin
Принадлежит: SIEMENS AG

A control system for a wind park includes a plurality of limit controllers. Each limit controller is configured to output a limit value set based upon a specific grid code requirement. A selection unit compiles a limit value set from the plurality of limit value sets according to a number of grid code requirements. The control system further includes a plurality of main controllers, wherein a main controller is configured to generate a setpoint for one or more wind turbines of the wind park according to the compiled limit value set. Further, a wind park and a method of controlling a wind park are provided.

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06-06-2013 дата публикации

Wind-power production with reduced power fluctuations

Номер: US20130140820A1
Принадлежит: Vestas Wind Systems AS

A method of operating at partial load a wind turbine ( 1 ) supplying electrical power to an electrical grid ( 20 ) includes monitoring stability of the grid; and upon detection of a reduced grid stability, changing operation of the wind turbine by limiting wind-caused fluctuations of the active-power supply to the electrical grid, or by reducing an already existing limit to fluctuations of the active-power supply.

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06-06-2013 дата публикации

Method for feeding electrical power into a three-phase ac voltage system

Номер: US20130141951A1
Автор: Stephan Adloff
Принадлежит: Wobben Properties GMBH

The present invention relates to a method for feeding an unbalanced, three-phase current into a three-phase AC voltage system, comprising the steps of: producing a positive phase-sequence system for the current to be fed in, producing a negative phase-sequence system for the current to be fed in, superimposing the positive phase-sequence system and the negative phase-sequence system to form the current to be fed in and feeding the current composed in this manner into the three-phase AC voltage system.

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13-06-2013 дата публикации

Solar powered electrical circuit integrating: Auxillaries & Lighting System

Номер: US20130147352A1
Автор: Thomas James Williams
Принадлежит: Individual

Powered Electrical Circuit Integrating: Auxiliaries & Lighting System hereinafter named: SPECIALS is a Process to improve Economics and to improve Electrical-Efficiency, for Solar-Cells and/or Wind-Generators that are installed atop of Parking Garages or near Parking Garages,. for Electricity Generated to be used in either Aboveground Garages in Buildings or Underground Garages in Buildings and other areas of Building. DARK Garages' unpainted GRAY Walls, Columns, Floors, Ceilings, DARK Stairways and areas are painted with bright WHITE Paint, thereby WHITE Paint, allows a REDUCTION of Electricity used to illuminate these DARK Garages and other DARK Structures. Advertising Space such as Signage, Billboards and other Media in, around and adjacent to Parking Garage and nearby Structures maybe Rented, or Sold, in which a portion of Advertising Dollars maybe budgeted to defray cost of Solar-Cells and/or Wind Generators operations. Other benefits of SPECIALS are described herein.

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27-06-2013 дата публикации

Methods and Systems For Controlling An Intra-Plant Voltage Level

Номер: US20130162047A1
Принадлежит: Individual

A power plant coupled to, and configured to provide power to, an electrical grid, is described. The power plant includes a plurality of power converters electrically coupled to, and configured to receive power from, at least one power source. The power plant also includes a voltage regulation device electrically coupled between the power converters and the electrical grid. The voltage regulation device includes a series transformer and a bi-directional converter configured to regulate a voltage at an output of the power converters.

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27-06-2013 дата публикации

Charge pumping apparatus using optimum power point tracking and method thereof

Номер: US20130162335A1

A charge pumping apparatus includes a voltage pumping unit for pumping an input voltage, a voltage pumping control unit for controlling the voltage pumping unit according to a comparison result between the input voltage and an input criterion voltage and a comparison result between an output voltage output from the voltage pumping unit and an output criterion voltage, and an optimum power point tracking unit for tracking an optimum power point in the case of detecting that the output voltage decreases lower than the output criterion voltage, and adjusting an input impedance to change the input criterion voltage to a voltage corresponding to the optimum power point, wherein the optimum power point is a power point where an input power according to the input voltage becomes a maximum. Since the optimum power point is tracked by measuring only a voltage without a current sensor, a power loss is small.

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