Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663)
05/2011
05/11/2011CN102055364A Operation of a three level converter
05/11/2011CN102055361A Utility-interactive inverter system architecture and method of operation thereof
05/11/2011CN102055240A Smart charger
05/11/2011CN102055208A Low-voltage traversing control method for double-fed wind power generation system
05/11/2011CN102055207A Intelligent power control unit for low voltage ride through and application thereof
05/11/2011CN102055206A Hybrid wind-solar inverters
05/11/2011CN102055205A Voltage unbalanced mathematical model-based control strategy for brushless double-feed motor grid-side converter
05/11/2011CN102055204A Method and system for controlling network-side converter
05/11/2011CN102055203A Power supply device for intelligently adjusting power grid load peak and valley in communication base station
05/11/2011CN102055202A Three-phase balancing power-supply energy-saving control management system
05/11/2011CN102055201A Power system low-frequency oscillation mechanism analysis method based on micro-disturbance signal oscillation mode recognition
05/11/2011CN102055200A Method for calculating capacity configuration of reactive power compensation capacitor device of transformer substation
05/11/2011CN102055199A Reactive demand second order prediction algorithm suitable for automatic control of unequal capacity capacitor bank and application thereof
05/11/2011CN102055198A Reactive compensation intelligent monitoring management system
05/11/2011CN102055197A Method for establishing controllable serial compensation linearized model
05/11/2011CN102055196A 10 kv-distribution network reactive power compensation optimization method in power system
05/11/2011CN102055195A Method for controlling reactive voltages of transformer substation based on magnetic control reactor (MCR)
05/11/2011CN102055194A Systems and methods for regulating power in renewable energy sources
05/11/2011CN102055193A Static reactive power compensation device based on controllable reactor
05/11/2011CN102055192A Selecting method of discrete reactive equipment based on weighting operation factors
05/11/2011CN102055191A Wide area load shedding control method for quiescent voltage stabilization considering external power grid equivalence
05/11/2011CN102055190A Monitoring system and management system for harmonic wave systematicness of distribution network
05/11/2011CN102055189A Control method for three-phase unified electric energy quality controller without isolating transformer
05/11/2011CN102055188A Ultra-short term wind power forecasting method based on time series method
05/11/2011CN102055187A Large-scale interconnected power grid spinning reserve risk assessment method based on state space division method
05/11/2011CN102055186A Method and device for processing power system topology structure information
05/11/2011CN102055185A Energy consumption-free standby energy saver for household electrical appliances
05/11/2011CN102054637A Fuse alarming device and power factor compensating system with same
05/11/2011CN101621204B Method for designing crowbar resistor for passing through low voltage of double-fed type wind generator system
05/11/2011CN101615213B Evaluation method of power system state estimated result based on expanded uncertainty
05/11/2011CN101588068B Automatic load-reducing control method for integrating the voltage frequency dynamic mutual influence
05/11/2011CN101572409B Self-adaptive device and method for analyzing global power flow of generation, transmission and distribution
05/11/2011CN101478183B Apparatus and method for obtaining electricity from high voltage electric cable
05/11/2011CN101447669B Method for monitoring safety and stability of electric network based on stable rule information model
05/11/2011CN101404475B Method for restraining hyposynchronous resonance of power system
05/11/2011CN101297469B A transmission system and a method for control thereof
05/11/2011CN101297455B A converter station
05/11/2011CN101291058B Double AC bus synchronizing apparatus for AC sourced system
05/11/2011CN101252277B Startup method of idle load long line
05/11/2011CN101231523B Control system and method for sensibility charge
05/11/2011CN101110518B Method for synchronization of three-phase parallel type inversion module
05/10/2011US7939970 Variable frequency wind plant
05/10/2011US7939962 System and method for supplying power to user systems onboard an aircraft
05/10/2011US7939954 System for controlling and protecting against symmetrical and asymmetrical faults for asynchronous-type generators
05/09/2011CA2720196A1 Parallel ac switching with sequential control
05/05/2011WO2011051997A1 Lead storage battery operating method and electrical storage device equipped with lead storage battery operated by this operating method
05/05/2011WO2011051772A1 Direct-current power supply device and direct-current power supply system
05/05/2011WO2011050827A1 Monitoring of an energy transmission system or energy distribution system
05/05/2011WO2011050807A2 Wind power plant with optimal power output
05/05/2011WO2011022253A3 Context-aware smart home energy manager
05/05/2011WO2011005838A3 Grid frequency-responsive solid oxide fuel cell system
05/05/2011WO2010129398A3 Multi-feed rf distribution systems and methods
05/05/2011WO2010119006A3 Method and apparatus for determining and processing energy data from a data technology device
05/05/2011WO2010108910A3 Method for operating a wind turbine
05/05/2011WO2010086032A3 Power system frequency inertia for power generation system
05/05/2011US20110101787 Series/parallel power supply switching
05/05/2011US20110101786 Method and apparatus for anti-islanding of distributed power generation systems
05/05/2011US20110101785 Method and apparatus for maintaining uninterruptible power supplies
05/05/2011US20110101783 Electrical Power Distribution System and Method Thereof
05/05/2011US20110101777 Systems and methods for optimizing power loads in a power distribution unit
05/05/2011US20110101690 Wind farm and method for operation of a wind farm
05/05/2011DE102010045282A1 Method for managing energy resources in assembly of e.g. electric motor and wind turbine, involves regulating maintenance of energy quotas when exceeding below/above energy quotas, and controlling producers with respect to energy production
05/05/2011DE102009051405A1 Method for using current peaks for producing current by electricity board, involves detecting switching signal and/or switch off signal by detection circuit of end customer, and separating current path from distribution network
05/05/2011DE102009050402A1 Energy processing and storage system for e.g. wind power generators, has high-volt rechargeable battery reservoir working on high voltage level of frequency converter intermediate circuit and coupled with intermediate circuit
05/04/2011EP2317640A1 Stationary power plants
05/04/2011EP2317623A1 Hybrid wind-solar inverters
05/04/2011EP2317135A1 Wind turbine control method
05/04/2011EP2316735A1 Power distribution apparatus
05/04/2011EP1715557B1 Power converter
05/04/2011CN201821285U DSP (digital signal processor) control grid-connected photovoltaic inverter
05/04/2011CN201821218U Motor alarm circuit
05/04/2011CN201821124U Photovoltaic power generation access device
05/04/2011CN201821119U Motor stator lead wire connecting structure
05/04/2011CN201821118U Direct drive wind power generation system based on double SVPWM current mode converter
05/04/2011CN201821117U Wind farm access device based on low-frequency transmission and high-voltage DC (direct current) transmission
05/04/2011CN201821116U Wind power field access device based on low-frequency power transmission and high-voltage direct-current power transmission
05/04/2011CN201821115U Wind power plant integral low-voltage ride-through (LVRT) system
05/04/2011CN201821114U Voltage regulating type automatic reactive power compensation device of transformer substation
05/04/2011CN201821113U Integrated display controller for low-voltage reactive power automatic compensation
05/04/2011CN201821112U Power capacitor
05/04/2011CN201821111U Fixed and static synchronous compensation mixed style dynamic reactive power compensation device
05/04/2011CN201821110U Self-saturation dynamic reactive power compensation device
05/04/2011CN201821109U Dynamic reactive power compensation device
05/04/2011CN201821108U Novel dynamic reactive power compensation device
05/04/2011CN201821107U Contactor type intelligent capacitor
05/04/2011CN201821106U Reactive power compensation and filtration device in 1KV intermediate frequency furnace
05/04/2011CN201821105U 箱式电抗器 Box-type reactors
05/04/2011CN201821104U Structure of active power filter device
05/04/2011CN201821103U Filtering compensation device for power supply of monocrystalline silicon furnace
05/04/2011CN201821102U Drawer type filtering compensation module
05/04/2011CN201821101U Device for reducing power supply output ripple
05/04/2011CN201821100U Automatic phase synchronization controller for frequency converter output and power grids
05/04/2011CN201820621U Single core column and single coil adjustable reactor
05/04/2011CN201820574U Overcurrent protecting reactor for static volt-ampere reactive generator system
05/04/2011CN102047524A Power supply/demand control device and power supply/demand control method
05/04/2011CN102047523A Impedance correction
05/04/2011CN102044924A Internal double-feed wind-driven generator
05/04/2011CN102044885A System and method for decreasing solar collector system losses
05/04/2011CN102044884A Power distribution systems
05/04/2011CN102044883A Maximum power point tracking (MPPT) optimization method for single-stage photovoltaic grid-connected inverter