| Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663) |
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| 08/04/2010 | CN101383511B Electrical power system status estimation method based on measurement data by data collection system |
| 08/03/2010 | US7769497 Method of super super decoupled loadflow computation for electrical power system |
| 08/03/2010 | US7768241 Device for adjusting the impedance of a high voltage line supplying an alternating current |
| 08/03/2010 | US7768152 Automatic sensing power systems and methods |
| 08/03/2010 | US7768150 Power management unit for battery-operated devices |
| 08/03/2010 | CA2385588C Wind power plant |
| 07/29/2010 | WO2010084077A1 Method for operating a converter circuit, and apparatus for carrying out the method |
| 07/29/2010 | WO2010083846A1 Method and circuit arrangement for supplying a multiphase electrical network |
| 07/29/2010 | WO2010083639A1 Two-control-three precharging phase-controlled switch circuit for switching capacitor bank |
| 07/29/2010 | WO2010058028A3 Frequency convertor |
| 07/29/2010 | WO2010045349A3 Electrical energy saving system |
| 07/29/2010 | US20100188009 Multi-Modal Load Control System Having Occupancy Sensing |
| 07/29/2010 | US20100187914 Methods and apparatus for power factor correction and reduction of distortion in and noise in a power supply delivery network |
| 07/29/2010 | US20100187907 Secondary battery controlling apparatus and controlling method |
| 07/29/2010 | DE102009055287A1 Photovoltaik-Brennstoffzellen-Hybrid-Stromerzeugungssystem, bei dem ein einzelner Konverter und ein einzelner Inverter eingesetzt werden, sowie Verfahren zum Steuern desselben Of the same photovoltaic fuel cell hybrid power generation system in which a single converter, and a single inverter can be used, as well as methods for controlling |
| 07/29/2010 | DE102009005979A1 Production plant operating method, involves continuously detecting electrical current and/or voltage, analyzing and comparing detected electrical current and voltage, and supplying electrical current and voltage |
| 07/29/2010 | DE102008037575A1 Computergestütztes Verfahren zur Optimierung der Energienutzung in einem lokalen System A computerized method for optimizing energy use in a local system |
| 07/29/2010 | CA2750304A1 Method for operation of a converter circuit and apparatus for carrying out the method |
| 07/28/2010 | EP2210328A2 Method, apparatus and system for demand side electrical load management |
| 07/28/2010 | CN201536334U 斩控式三相交流电机节能控制器 Chopping three-phase AC motor energy-saving controller |
| 07/28/2010 | CN201536327U Modular current converter for three-phase static synchronous compensator |
| 07/28/2010 | CN201536266U Single-phase and three-phase selectable power grid feedback device |
| 07/28/2010 | CN201536265U Megavar grade chain type static synchronous compensator based on IGBT |
| 07/28/2010 | CN201536264U Ideal energy saving alternating current electromotor |
| 07/28/2010 | CN201536263U 调压式动态无功补偿装置 Surge-type dynamic reactive power compensation device |
| 07/28/2010 | CN201536262U 一种基于ucps的cps考核罚款分摊系统 An assessment of fines assessed ucps of cps-based systems |
| 07/28/2010 | CN201535233U 底驱式风力发电机组 Bottom-drive wind turbines |
| 07/28/2010 | CN1829035B Building electric fire hidden trouble alarm power distribution method and its circuit |
| 07/28/2010 | CN101790827A Prediction scheme for step wave power converter and inductive inverter topology |
| 07/28/2010 | CN101789629A Electricity-saving space evaluating system and method |
| 07/28/2010 | CN101789608A Isolated power grid multi-unit parallel load distribution control system |
| 07/28/2010 | CN101789607A Computing method for improving small signal stability and providing aid decision making |
| 07/28/2010 | CN101789606A Boosting method for synchronization without insulating photovoltaic grid-connected inverters |
| 07/28/2010 | CN101789605A Frequency reestablishment method used for microgrid |
| 07/28/2010 | CN101789604A Method for judging severity of grid voltage dip |
| 07/28/2010 | CN101789603A Method and circuit for alternating-current dynamic active power factor compensation |
| 07/28/2010 | CN101789602A Dynamic simulation device of extra-high, ultrahigh voltage thyristor controlled series compensation device and test method thereof |
| 07/28/2010 | CN101789601A Real time digital system (RTDS) phase-locking synchronous element |
| 07/28/2010 | CN101789600A Method for controlling dynamic direct voltage of parallel connection type active electric filter |
| 07/28/2010 | CN101789599A Electrical system and control method |
| 07/28/2010 | CN101789598A Power system load modelling method |
| 07/28/2010 | CN101789597A Power grid stable-limitation intelligentized management method based on rule engine technique |
| 07/28/2010 | CN101789596A Automatic detection method of power grid failure |
| 07/28/2010 | CA2690577A1 Distributed generation power system |
| 07/27/2010 | US7764044 Motor driving apparatus capable of driving motor with reliability |
| 07/27/2010 | US7763990 Hybrid green uninterruptible power system and bi-directional converter module and power conversion method thereof |
| 07/27/2010 | CA2604657C An apparatus and method for compensating secondary currents used in differential protection to correct for a phase shift introduced between high voltage and low voltage transformer windings |
| 07/22/2010 | WO2010083164A2 Distribution system analysis using meter data |
| 07/22/2010 | WO2010082981A2 Method and apparatus for controlling a hybrid power system |
| 07/22/2010 | WO2010082536A1 Power demand-supply management server and power demand-supply management system |
| 07/22/2010 | WO2010082265A1 Power converting apparatus |
| 07/22/2010 | WO2010006397A3 System and method for regulating a load voltage in power distribution circuits |
| 07/22/2010 | US20100181838 Roof Power Generator |
| 07/22/2010 | US20100181835 Network |
| 07/22/2010 | US20100181834 Circuit arrangement for the selective operation of at least two electric machines |
| 07/22/2010 | US20100181830 Method and apparatus for characterizing a circuit coupled to an AC line |
| 07/22/2010 | DE202009002777U1 System zum lastunabhängigen Einschalten eines Netzfreischaltungsrelais System for load-independent switching of a mains cut-off relay |
| 07/22/2010 | DE102009037241A1 Processing unit e.g. programmable logic controller, for e.g. power switch of energy distributor, has electric circuit in which spectral portion of fundamental frequency of measurement variable is calucated by Goertzel algorithm |
| 07/22/2010 | DE102008063954B3 Decentralized energy supply system controlling method for e.g. hybrid vehicle, involves calculating data, and repeating determination, calculation and decision steps in intervals, which consider high rate of change of information of nature |
| 07/22/2010 | CA2748947A1 Method and apparatus for controlling a hybrid power system |
| 07/22/2010 | CA2748014A1 Distribution system analysis using meter data |
| 07/21/2010 | EP2209206A1 System and method for fixed frequency power generation |
| 07/21/2010 | EP2209205A1 Method for operating a wind energy system in case of overvoltage in the grid |
| 07/21/2010 | EP2209200A2 Electrical System And Control Method |
| 07/21/2010 | EP2209199A1 Method for operating an inverter controller and device for carrying out the method |
| 07/21/2010 | EP2208281A1 Photovoltaic inverter unit with option for switching between a power supply system with a fixed frequency and a load variable frequency |
| 07/21/2010 | EP2208276A1 Method of operation and device for controlling an energy installation with photovoltaic modules |
| 07/21/2010 | EP2208275A1 Device for regulating a high-voltage direct-current transmission system |
| 07/21/2010 | EP2208274A1 Method for regulating a reactive power compensator |
| 07/21/2010 | EP2208273A2 Active network management |
| 07/21/2010 | EP2208272A2 A method of extension of the regulation range of electric power supplied to the electricity grid and an energy system with an extended regulation range |
| 07/21/2010 | CN201533243U Alternating current drive system |
| 07/21/2010 | CN201533174U Energy feedback device |
| 07/21/2010 | CN201533173U Solar, wind and water complementary water pumping energy storage generating peak adjusting device |
| 07/21/2010 | CN201533172U Filter and transformation integrated device of photovoltaic grid-connected inverted power supply |
| 07/21/2010 | CN201533171U Reactive power optimization controller with network deployment and on-line monitoring functions |
| 07/21/2010 | CN201533170U Anti-explosion three-phase static synchronous compensator |
| 07/21/2010 | CN201533169U Capacitance compensation fling-cut switch |
| 07/21/2010 | CN201533168U Main circuit component of capacitance compensation fling-cut switch |
| 07/21/2010 | CN201533167U Capacitance compensation on-off switch |
| 07/21/2010 | CN201533166U Multifunctional harmonic protector |
| 07/21/2010 | CN201533165U Three-phase energy-saving device |
| 07/21/2010 | CN201533164U Automatic control delay power protector |
| 07/21/2010 | CN201532835U Dry type hollow parallel capacity regulating reactor |
| 07/21/2010 | CN201532834U Dry type hollow electrified railway serial capacity adjusting reactor |
| 07/21/2010 | CN201531381U Solar power generator |
| 07/21/2010 | CN201531370U Intelligent gradient stable high-quality large-power wind generating set |
| 07/21/2010 | CN101785174A Inverter unit without transformer for thin-film solar panels |
| 07/21/2010 | CN101783611A Split induction three-level photovoltaic grid-connected inverter and control method thereof |
| 07/21/2010 | CN101783597A Dynamic reactive compensation device based on direct current side active structure and amplitude adjustment control |
| 07/21/2010 | CN101783515A Submerged arc furnace secondary reactive compensation control system and method |
| 07/21/2010 | CN101783514A Correction method and circuit of AC load power factor |
| 07/21/2010 | CN101783513A Wind energy converter, wind energy generating equipment and system |
| 07/21/2010 | CN101783512A Digital power factor and reactive power measurement and control device |
| 07/21/2010 | CN101783511A Two-control three-precharge phase-control switch circuit of switched capacitor bank |
| 07/21/2010 | CN101355252B Method for compensating error of parallel type mixed active electric power filter |
| 07/21/2010 | CN101282041B Method for estimating and optimizing dynamic safety risk of power transmission system based on practical dynamic safety field |
| 07/20/2010 | US7759910 System for transmission of electric power |
| 07/20/2010 | US7759823 Switching device |
| 07/20/2010 | CA2580634C Regenerative energy system |