Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663)
11/2011
11/16/2011CN102244384A Optimal operation method of main transformers based on economic equivalent analysis
11/16/2011CN102244383A Power supply circuit capable of balancing load voltages
11/16/2011CN101820281B Single-phase phase locked loop based on double-park transformation phase discriminator and implement method thereof
11/16/2011CN101710732B Unmanned helicopter continuous voltage-stabilizing power supply system with engine air restarting function
11/16/2011CN101697422B Micro-grid multi-micro-source inverter loop current and voltage fluctuation master-slave control method
11/16/2011CN101673949B Method for automatically generating electric network current diagram
11/16/2011CN101645607B Quick ideal condition quasi-synchronization paralleling method of hydro-generator
11/16/2011CN101640423B Generator system for wind power generation and variable speed control method
11/16/2011CN101635457B Electric network parameter estimation method based on parameter sensitivity of state estimation residual error
11/16/2011CN101630845B Controller of production clearance reactive power compensation device of power supply in distribution systems of small steel rolling workshop
11/16/2011CN101593983B Method for quickly positioning oscillating center of electric system
11/16/2011CN101577426B Power system state estimator applicable to wide area measurement system
11/16/2011CN101567566B Unit load dispatching policy
11/16/2011CN101447664B Transformer operation control apparatus and method for suppressing magnetizing inrush current
11/16/2011CN101345423B 5-power level H-bridge cascade connection back-to-back current transformer used for wind power generation system
11/16/2011CN101295877B Control system of offshore wind power flexible DC power transmission current transformer
11/16/2011CN101272055B Low voltage traversing control method of wind generator set
11/15/2011US8060259 Wide-area, real-time monitoring and visualization system
11/15/2011US8058753 Wide area transmission control of windfarms
11/15/2011US8058746 Converter for electrical power recovery
11/15/2011US8058745 Systems and methods providing a power converter
11/15/2011DE202011051180U1 Energieentnahmegerät in verteilter Bauweise Energy extraction device in a distributed design
11/12/2011CA2739811A1 Automated mechanical disconnection of an electrical converter module in a frequency converter arrangement
11/12/2011CA2739779A1 Phase control apparatus
11/10/2011WO2011140559A1 Systems and methods for islanding detection
11/10/2011WO2011140111A2 Managing renewable power generation
11/10/2011WO2011139968A1 Wireless lighting devices and grid-shifting applications
11/10/2011WO2011139833A2 Method and apparatus for distributed power generation
11/10/2011WO2011138581A2 Combined power monitoring, control and networking device
11/10/2011WO2011092193A3 Method for emulation of synchronous machine
11/10/2011WO2011073670A3 Generation plant control apparatus and method
11/10/2011WO2008077654A9 Electrical power usage controller
11/10/2011US20110276192 Systems and methods for islanding detection
11/10/2011US20110273017 Photovoltaic power plant
11/10/2011US20110273013 Power supply arrangement with a first voltage supply device and a second voltage supply device
11/10/2011US20110273008 Integrated circuit with supply line intra-chip clock interface and methods for use therewith
11/10/2011DE102010028638A1 Verfahren zum Versorgen eines elektrischen Hausgeräts aus einem Niederspannungsversorgungsnetz Method for supplying an electric household appliance from a low-voltage power supply network
11/10/2011DE102010019376A1 Electricity meter system for power consumption acquisition of electric cars, has electricity meter formed by separating device to release or interrupt power supply based on received data of computerized unit and consumer assigned data
11/10/2011DE102010017762A1 Power plant i.e. photovoltaic power plant, for generation of electric power from sunlight, has component storing thermal power in energy storage unit, and another component producing electrical power from thermal power
11/09/2011EP2385595A2 Integrated electricity distribution arrangement
11/09/2011EP2385381A2 Device for measuring the network impedance of an electric supply network
11/09/2011EP2384541A2 Power system frequency inertia for wind turbines
11/09/2011EP2384540A2 Power system frequency inertia for power generation system
11/09/2011EP2384528A2 Method for balancing the intermediate circuit voltages in a self-guided, multi-level blind current compensator and self-guided, multi-level blind current compensator
11/09/2011EP2191550B1 Statcom system for providing reactive and/or active power to a power network
11/09/2011EP1879277B1 Wind farm and method for operating a wind farm
11/09/2011CN202034965U Phase-locked loop and phase angle generator
11/09/2011CN202034907U H bridge serial connection multilevel voltage sag generator based on IGBT
11/09/2011CN202034801U Solar power supply system
11/09/2011CN202034796U Quick-start power system of control rod driving mechanism
11/09/2011CN202034795U Inverter interconnecting system with phase compensating function
11/09/2011CN202034794U Self-power-generating sports equipment multi-equipment grid-connecting device
11/09/2011CN202034793U Non-transformer wind power generation grid connection topology structure based on H bridge
11/09/2011CN202034792U Electric supply mobile crane transition power supply based on super capacitor
11/09/2011CN202034791U Electric-power energy storing device
11/09/2011CN202034790U Large-capacity electric power energy storage device
11/09/2011CN202034789U Controlled silicon fast regulator control circuit
11/09/2011CN202034788U Intermediate frequency capacitor box
11/09/2011CN202034787U Anti-explosive filter compensation energy-saving set device for mines
11/09/2011CN202034786U Filtering compensation energy-saving complete equipment for ore furnace
11/09/2011CN202034785U Cascade stage frequency conversion speed regulation device with dynamic reactive power local compensation
11/09/2011CN202034784U Reactive automatic control device of high pressure distribution system
11/09/2011CN202034783U Reactive compensation device for substation informatization
11/09/2011CN202034782U Static reactive power compensator
11/09/2011CN202034781U Chopped-mode reactive power continuous compensation device
11/09/2011CN202034780U 110kV filter compensation energy-saving set device
11/09/2011CN202034779U Combined packaging type capacitor
11/09/2011CN202034778U Device for realizing parallel secondary loop voltage of electronic voltage transformer
11/09/2011CN202034695U Single power supply 10kV power distribution unit
11/09/2011CN202034694U Dual power supply 10kV power distribution device
11/09/2011CN102239631A System and method for monitoring power damping compliance of a power generation unit
11/09/2011CN102237826A Power tracing method of photovoltaic system, photovoltaic system and power conversion system
11/09/2011CN102237824A Photovoltaic (PV) inverter
11/09/2011CN102237717A Power consumption management system, power consumption manager and power consumption management method
11/09/2011CN102237691A Wind energy and solar energy grid-connected generation system and control method thereof
11/09/2011CN102237690A Method for improving overall efficiency of photovoltaic inverter system
11/09/2011CN102237689A System for interchanging electric energy between a battery and an electric grid and respective method and application
11/09/2011CN102237688A Method and equipment for controlling energy storage device
11/09/2011CN102237687A Multi-column independent control compound switch type stepped controlled shunt reactor device
11/09/2011CN102237686A Method and apparatus for reduction of harmonics in a power supply
11/09/2011CN102237685A Connecting mechanism for feed-through filter
11/09/2011CN102237684A Electric power control system, electric power control method, and control device, data storage medium, and server device for the same
11/09/2011CN102237683A Intelligent control system for electromagnetic precise control type electricity-saving device
11/09/2011CN102237682A Intelligent energy-saving control system and temperature and time control systems for electromagnetic precise regulation and control type electricity-saving device
11/09/2011CN102237681A Control method and system for power consumption of home appliances and corresponding device
11/09/2011CN101651349B Fuel cell generator
11/09/2011CN101567562B Comprehensive negative sequence and harmonic compensating system of electrified high-speed railway
11/09/2011CN101510104B Three phase ac voltage stabilizer applying multi-standard method and three phase ac voltage stabilizer
11/09/2011CN101478159B Transient stabilized constraint tide optimization process
11/09/2011CN101088201B Electric power flow control
11/09/2011CN101040416B Method for controlling the quality of the electron energy of an electrical power supply system
11/08/2011US8054135 Class-E amplifier and lighting ballast using the amplifier
11/08/2011US8054011 Variable frequency transformer having multiple horizontal rotary transformers with common controls and voltage infrastructure and method
11/08/2011US8053932 Connection apparatus for parallel running generators
11/08/2011US8053930 Solar power plant
11/08/2011US8053929 Solar power array with maximized panel power extraction
11/08/2011US8053925 Modulation monitor and control
11/08/2011DE202011051435U1 Intelligentes Elektroenergiesystem mit Schnellregelung der Wirkleistung Intelligent electric power system with quick control of active power
11/08/2011DE202011051377U1 Anordnung zum Betreiben eines Verbrauchers mit der elektrischen Leistung einer regenerativen Energiequelle Arrangement for operating a consumer with the electric power a renewable energy source
11/07/2011DE202011102535U1 Kaskadierte Konverterstation und kaskadiertes Mehrfachanschluss-HVDC-Leistungsübertragungssystem Cascaded converter station and cascaded multi-terminal HVDC power transmission system