Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663)
08/2002
08/07/2002EP1228491A1 System for certified use of electrical energy
08/07/2002CN2504825Y Dynamo multifunctional energy saving control case of pumping unit
08/07/2002CN2504822Y One-stage resonance high power factor switching mains
08/07/2002CN2504811Y Reactive-load compensation circuit device of high voltage network
08/07/2002CN2504810Y Overvoltage protector of electric underwater pump
08/06/2002US6430066 Electric power system having series connected capacitor
08/06/2002US6429546 Systems and methods for preventing islanding of grid-connected electrical power systems
08/06/2002US6428918 Fuel cell power systems, direct current voltage converters, fuel cell power generation methods, power conditioning methods and direct current power conditioning methods
08/01/2002WO2001096993A3 Control circuit for sequentially switching electrical loads
08/01/2002US20020103772 System and method for gathering of real-time current flow information
08/01/2002US20020103745 System, method and computer program product for enhancing commercial value of electrical power produced from a renewable energy power production facility
08/01/2002US20020101743 Power line separator
07/2002
07/31/2002CN2503655Y Stationary reactive-load compensation device
07/30/2002US6425248 Solar power generation administration system, and solar power generation administration method to provide useful information to user
07/30/2002CA2238442C Wall type microwave oven and output control method thereof
07/25/2002WO2002058207A1 System of transport and distribution of energy to voltage inclusive between 600v and 1200v
07/25/2002WO2002041463A3 System for correcting power factor and harmonics present on an electroduct in an active way and with high-dynamics
07/25/2002WO2002011263A3 Power grid backfeed protection apparatus
07/25/2002US20020097055 Method and device for assessing the stability of an electric power transmission network
07/25/2002DE10058404A1 Haushaltsgerät mit Energiemanagement Household appliance energy management
07/24/2002EP1224721A1 Method for controlling the reactive power and device for generating electrical energy in an electrical network
07/24/2002EP0986491B1 A plant for feeding alternating voltage
07/24/2002EP0886912B1 A converter device
07/24/2002CN2502441Y Totally-enclosed adjustable capacity high voltage shunt capacitor device
07/24/2002CN2502440Y Totally-enclosed high voltage shunt capacitor device
07/23/2002US6424548 Power converter
07/18/2002WO2002010877B1 System of and method for power management
07/18/2002WO2002007365A3 System and method for monitoring and controlling energy usage
07/18/2002WO2001090996A3 System for trading, scheduling and settling transactions involving fungible, ephemeral commodities including power and method therefor
07/18/2002US20020093249 Method and system for operation verification
07/17/2002EP1222727A1 Control of extinction angle for a line-commutated converter
07/17/2002EP1222390A2 Wind power plant
07/17/2002EP1222389A1 Method for operating a wind farm
07/17/2002CN2501238Y Three-phase asynchronous motor with capacitors
07/17/2002CN1359183A Mixing type reactive power generator
07/17/2002CN1359046A Method and system for raising failure bearing ability of power supply in connected computer system network
07/17/2002CN1087882C Frequency converter for outgoing electric driving power to motor and filtering installed on it
07/16/2002US6421366 Method and device for supplying an electric arc melting furnace with current
07/16/2002US6420978 Power generation system and fuel supply method
07/16/2002US6420856 Versatile power flow transformers for compensating power flow in a transmission line
07/11/2002WO2002054579A1 Mobile power generation system
07/11/2002WO2002054572A1 Bi-directional power supply circuit
07/11/2002WO2002054561A2 System, method and computer program product for enhancing commercial value of electrical power produced from a renewable energy power production facility
07/11/2002US20020091626 Bidding for energy supply
07/11/2002US20020091503 Process for initializing and updating the topology of a high-voltage or medium-voltage electrical power station
07/11/2002US20020089802 Distribution line fault detector and communications module
07/11/2002US20020089234 Distributed control method for multiple connected generators
07/11/2002CA2439355A1 Mobile power generation system
07/10/2002EP1221189A1 Method for managing energy consumption of household appliances
07/10/2002CN2500014Y Self cooling type thyrister cut-in and cut-off capacitor device
07/10/2002CN2500013Y Thyrister trigger pulse transmission circuit
07/10/2002CN2500012Y AC dynamic harmonic capacitor
07/09/2002US6417652 Load drive circuit for an electric load
07/09/2002US6417647 Charging system and charging method for use of battery power
07/09/2002CA2219255C Control apparatus for a converter for transmitting electric power between an alternating voltage network and a direct voltage network
07/04/2002WO2002052375A2 Systems and methods for trading electrical transmission rights
07/04/2002WO2002052294A2 System and method for reliability assessment of a power system having integrated modules
07/04/2002WO2002027910A3 Sub-cycle static voltage regulator and controller
07/04/2002US20020087234 System, method and computer program product for enhancing commercial value of electrical power produced from a renewable energy power production facility
07/04/2002US20020085397 Power converting apparatus, control method therefor, and power generation system
07/04/2002US20020085396 Plant for transmitting electric power and a method for changing the direction of power transmission in such a plant
07/04/2002US20020085325 System interconnection apparatus and connection method thereof
07/04/2002US20020084655 System, method and computer program product for enhancing commercial value of electrical power produced from a renewable energy power production facility
07/04/2002DE19815566A1 To compensate for fuel for IC engines has dynamo with power which must feed magnetic amplifier with sufficiently fast-running engine and at same time charge up battery
07/04/2002DE10162955A1 Anordnung für das Energiemanagment einer unterbrechungsfreien Stromversorgung Arrangement for the energy management of an uninterruptible power supply
07/03/2002EP1220417A2 Power transfer system
07/03/2002EP1220412A1 Method and device for controlling and monitoring consumption of electrical power
07/03/2002EP1219004A1 Device, system and method for monitoring a household electrical appliance
07/03/2002EP1219001A1 Method for recognizing an oscillation in an electric supply network
07/03/2002EP1218999A1 The virtual trading floor for trading fungible, ephemeral commodities including electric energy
07/03/2002EP0890212B1 Transformer arrangement
07/03/2002CN1356753A Control method of active power filter in mixed filter system for electrified railway
07/02/2002US6414853 Method and apparatus for controlling a phase angle of AC power to keep DC voltage from an energy source constant
06/2002
06/27/2002US20020082784 Technique and apparatus to control the transient response of a fuel cell system
06/27/2002US20020082747 Energy management system and methods for the optimization of distributed generation
06/27/2002US20020079957 Reducing noise in a power signal
06/27/2002US20020079878 Device for controlling in rush current to power factor correcting capacitor bank
06/27/2002DE10064165A1 Method for monitoring and controlling energy use of a group of individually switched energy loads, particularly electrical appliances within a household to help in minimizing energy use
06/26/2002EP1217709A1 Method and device for assessing the stability of an electric power transmission network
06/26/2002CN2497463Y Self-variable reactance capacitor apparatus
06/26/2002CN2497462Y Domestic electric appliance energy-saving protector
06/26/2002CN1355587A Separation system for protection and automation function of protective relay in electric system
06/26/2002CN1086854C Customer side power management system and method
06/25/2002US6411067 Voltage source converters operating either as back-to-back stations or as parallel static var compensators
06/25/2002US6411066 Method to control the flow of active power in a high voltage direct current transmission system and device for the same
06/25/2002US6411065 Integrated control system and method for controlling mode, synchronization, power factor, and utility outage ride through for micropower generation systems
06/25/2002US6410992 System and method for dual mode control of a turbogenerator/motor
06/20/2002WO2002049396A1 System for increasing circuit performance by reusing energy
06/20/2002WO2002049185A1 A robust controller for controlling a ups in unbalanced operation
06/20/2002WO2002049182A1 Voltage controller for grid-connected turbogenerator unit
06/20/2002WO2002023693A3 System for creating a cost effective retail electric power exchange service
06/20/2002WO2002010877A3 System of and method for power management
06/20/2002US20020078387 Method and system for providing power fault tolerance in a network of chained computer systems
06/20/2002US20020075701 Voltage regulation of a utility power network
06/20/2002US20020074863 Power transfer system
06/19/2002EP1215796A2 Method for running electric energy storage system
06/19/2002CN2496170Y Reactive compensation component which can be fit in three-phase asychronous motor
06/19/2002CN2496118Y Power-factor adjustable transformer
06/19/2002CN1354968A Method and device for supplying electric arc melting furnace with current
06/19/2002CN1354552A Thyristor power-regulating system for temp. control system of heating equipment