Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663)
04/2011
04/06/2011CN201789303U Thyristor triggering impulse forming circuit for high-voltage reactive compensation device
04/06/2011CN201789302U No-load transformer compensation device of transformer substation
04/06/2011CN201789301U Closed loop control device for voltage and reactive power optimization operations
04/06/2011CN201789300U Three-phase system voltage-stabilization energy saver
04/06/2011CN201789299U Novel reactive compensation device of drawer type structure
04/06/2011CN201789298U Intelligent shockless capacitance switching electronic integrated switch
04/06/2011CN201789297U Switch output unit in high-voltage reactive power compensation device
04/06/2011CN201789296U Alternate current active power factor correction compensation circuit
04/06/2011CN201789295U Mineral flameproof type digital active power filter
04/06/2011CN201789294U Novel hybrid LSVG dynamic filter compensation device
04/06/2011CN201789293U SVM (support vector machine)-based wind and electricity power prediction device
04/06/2011CN201789292U 供电线路 Power lines
04/06/2011CN201789291U Double-power supply control circuit
04/06/2011CN201789207U Voltage-regulating and power-saving power distribution cabinet
04/06/2011CN201786568U Low voltage ride-through monitoring system of double-fed wind generator set
04/06/2011CN102007663A Apparatus and method for transmission line control
04/06/2011CN102007662A Wind energy system having a connection protection device
04/06/2011CN102007471A Method and apparatus for designing device-to-device configurations suitable to be used in a power system
04/06/2011CN102006004A Single phase fan frequency-conversion power-saving device
04/06/2011CN102005998A Low-voltage ride through circuit of double-feed type wind power generator
04/06/2011CN102005975A Solar air conditioner and solar air-conditioning system consisting of solar air conditioner
04/06/2011CN102005962A Buck-boost grid-connected inverter and control method thereof
04/06/2011CN102005953A Grid-connected inverter and alternating-current output filter method thereof
04/06/2011CN102005935A Great-power wind-power integration convertor suitable for cage asynchronous generator
04/06/2011CN102005843A Brushless double-fed wind driven generator and method for controlling brushless double-fed wind driven generating system
04/06/2011CN102005824A Elevator regenerative power-saving device
04/06/2011CN102005817A Uninterruptible power supply device based on microgrid and dispatching control method thereof
04/06/2011CN102005782A Grid connection control method of double-fed wind-driven generator
04/06/2011CN102005781A 10kV no-load automatic switching device for agricultural displacement transformer
04/06/2011CN102005780A Fault protection and energy stabilizing circuit of double-fed wind driven generator
04/06/2011CN102005779A Converter-based low voltage ride through control system of wind generating set
04/06/2011CN102005778A Intelligent switch for series inverter equipment
04/06/2011CN102005777A Control method and control system for photovoltaic grid-connected inverter
04/06/2011CN102005776A Electric interlocking circuit and realization method thereof
04/06/2011CN102005775A Method for improving low voltage ride through capacity of wind generating set
04/06/2011CN102005774A Systems and methods for interfacing renewable power sources to a power grid
04/06/2011CN102005773A Systems and methods for interfacing renewable power sources to a power grid
04/06/2011CN102005772A Network combination inversion system and control method thereof
04/06/2011CN102005771A Energy storage capacity selecting method of wind, photovoltaic and storage micro-grid system
04/06/2011CN102005770A System economizer and operating method thereof
04/06/2011CN102005769A Disturbed mode analysis-based dynamic stability assistance decision method for power system
04/06/2011CN102005768A Intelligent drawer type reactive compensation device with compensation function and special shipping car
04/06/2011CN102005767A Energy saving device for electric appliance
04/06/2011CN102005766A Control method for reactive compensation of network
04/06/2011CN102005765A Grid-connected operation reactive power controlling and regulating method suitable for large wind farm
04/06/2011CN102005764A Power factor compensation device
04/06/2011CN102005763A Non-static decoupling control method for reactive power negative sequence harmonic current PI
04/06/2011CN102005762A Direct current voltage on-line identification method for active filter
04/06/2011CN102005761A Special filtering-compensation complete equipment for short net
04/06/2011CN102005760A Universal wind power short-term forecasting method
04/06/2011CN102005759A System and method for acquiring electric power quality data from intelligent electric meter management system
04/06/2011CN102005758A Internal network actual information based method for external network static equivalents of two ports
04/06/2011CN102005757A Method for recognizing grid topology based on measurement spanning tree
04/06/2011CN102005716A Line side crowbar for energy converter
04/06/2011CN102004455A STATCOM (Static Synchronous Compensator) control system based on mixed chaotic sequence generator
04/06/2011CN102003349A Large-scale wind power active power optimization method under limit state of wind power
04/06/2011CN102003337A Active power control method of master station-end wind power field subject to wind power grid integration
04/06/2011CN101521387B Remote synchronizing method for restoring electric network
04/06/2011CN101383580B Low voltage traversing control method for double feeding wind power generator when in short circuit failure of electric network
04/06/2011CN101222143B Passive electric filtering compensation controller
04/06/2011CN101179195B Power distribution network planning scheme assistant decision system
04/06/2011CN101145695B Active power compensation device
04/06/2011CA2715932A1 Reactive power regulation and voltage support for renewable energy plants
04/05/2011US7919885 Method of controlling battery power, power control apparatus, and portable device using the same
03/2011
03/31/2011WO2011036757A1 Energy reduction device
03/31/2011WO2011036523A1 Grid-connected power supply system
03/31/2011WO2011035730A1 Capacitance compensation switching switch
03/31/2011WO2011035620A1 Capacitance compensation transfer switch
03/31/2011WO2011035461A1 State-matrix-independent dynamic process estimation method in real-time for weakly observable measurement nodes without pmu
03/31/2011WO2011008529A3 System and method for load control
03/31/2011WO2011008506A3 High speed feedback for power load reduction using a variable generator
03/31/2011WO2010146174A3 System for accessing, controlling and managing heterogeneous communicating objects
03/31/2011US20110074215 Energy storage based countermeasure for a delayed voltage recovery
03/31/2011US20110074165 Welbore Rig Generator Engine Power Control
03/31/2011DE102009042872A1 Anordnung zur Leistungszuführung an ein Arbeitssystem Arrangement for supplying power to a utility system
03/31/2011DE102009029592A1 Program controlled energy-monitoring-and control device for switching cabinet in energy-management system in e.g. factory, has storage device comprising switching output, at which output signal is provided and delivered via network
03/30/2011EP2302784A1 DC-AC inverters
03/30/2011EP2302755A1 An electrical power conversion system and method
03/30/2011EP2302754A1 A low frequency oscillation integrated analysis method and its system
03/30/2011EP2302572A1 A device and method for handling energy consumption
03/30/2011EP2301130A2 Methods and systems for managing facility power and cooling
03/30/2011EP2301129A2 Controller and method for controlling a device connected to a power supply
03/30/2011CN201781423U High-potential electronic plate of thyristor valve
03/30/2011CN201781290U Combination control cabinet of high-power double-fed wind driven generator
03/30/2011CN201781289U Solar power generation system
03/30/2011CN201781288U Solar energy/wind power plant grid generating system
03/30/2011CN201781287U Signal collector of self-adapting switch
03/30/2011CN201781286U Dynamic filter compensation device
03/30/2011CN201781285U Permanent magnet vacuum switch type inrush current free low voltage reactive power compensation device
03/30/2011CN201781284U Armored high-voltage silicon-controlled-thyristor (TSC) dynamic reactive power compensation device
03/30/2011CN201781283U Composite type energy-saving compensating device for ore-smelting furnace
03/30/2011CN201781282U Harmonic wave controller
03/30/2011CN201781281U Universal power saving device
03/30/2011CN201781280U Complex harmonic comprehensive treatment device for manufacturing high-precision electronic copper foils
03/30/2011CN201781279U Power network system of offshore oil platforms
03/30/2011CN201781278U 动力配电电路和动力配电柜 Power distribution circuits and power distribution cabinet
03/30/2011CN101997315A Voltage control device and voltage control method
03/30/2011CN101997314A Control method and system for selectively compensating wattless power by active filter
03/30/2011CN101997313A In-parallel compound filter
03/30/2011CN101995529A System and method for monitoring power filters and detecting power filter failure in wind turbine electrical generator