Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02J - Circuit arrangements or systems for supplying or distributing electric power; Systems for storing electric energy › H02J 3 - Circuit arrangements for ac mains or ac distribution networks
Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663)
05/1998
05/22/1998WO1998021803A2 Improvements relating to signalling in electricity distribution systems
05/20/1998EP0842557A1 Thyristor switched capacitor bank
05/20/1998CN2282291Y Specific power filter device
05/20/1998CN1182341A Frame synchronization method and apparatus
05/20/1998CN1038461C 并联多重逆变器 Multiple parallel inverters
05/19/1998US5754445 Load distribution and management system
05/19/1998US5754420 Rotating field transformer
05/19/1998US5754416 Single soft switching circuit for power supply
05/19/1998US5754045 Power line switching apparatus
05/19/1998US5754035 Apparatus and method for controlling flow of power in a transmission line including stable reversal of power flow
05/19/1998US5754034 Electrically controllable inductor
05/19/1998US5754033 Control system and circuits for distributed electrical-power generating stations
05/13/1998EP0840949A1 Power converter drive
05/13/1998CN2281612Y Automatic electrolyte ignition compensating controller for motor
05/13/1998CN2281602Y Motor energy saver
05/13/1998CN1038377C Power supply appts.
05/13/1998CN1038375C Control and protection system for AC-DC conversion system
05/12/1998US5751563 HVDC transmission
05/12/1998US5751138 Active power conditioner for reactive and harmonic compensation having PWM and stepped-wave inverters
05/12/1998CA2068864C Apparatus for a balanced three phase ac power supply in a computer having variable dc loads
05/07/1998DE19638880C1 Apparatus for feeding current into ac network
05/06/1998EP0840423A2 Overhead line for electrical energy transfer
05/06/1998CN2281033Y Star-connection unit combination type power-less power dynamic compensator
05/06/1998CN2281032Y Power-factor improved electric compensator
05/06/1998CN2281031Y Controller for corridor lamp of many-storied building
05/06/1998CN1181160A Process and device for the static and dynamic support of mains voltage by means of static compensator with self-commutated converter
05/05/1998US5747887 Multi-function electric power conversion system
04/1998
04/29/1998EP0838396A1 Power converting system for bidirectional conversion between hydraulic and electrical energy
04/29/1998EP0686103B1 Electrical arrangement
04/29/1998CN2280382Y Multi-protection, energy saving starter for ac motor
04/28/1998US5745368 Method for voltage stability analysis of power systems
04/28/1998US5745356 Independent load sharing of AC power systems connected in parallel
04/28/1998US5745355 Wireless selective tripping of AC power systems connected in parallel
04/23/1998WO1998016984A1 Method and device for compensating reactive current portions by means of a compensation arrangement with a pulse current rectifier
04/23/1998DE19642596A1 Verfahren und Vorrichtung zur Kompensation von Blindstromanteilen mittels einer Kompensationseinrichtung mit einem Pulsstromrichter Method and apparatus for compensating reactive current components by means of a compensating means with a pulse current converter
04/22/1998EP0836486A1 Power management system for a dialysis machine
04/22/1998CN2279747Y Non-circular current static phase advancer
04/22/1998CN1038169C Multiphase switching system and generator arrangement having such switching system
04/22/1998CA2213176A1 Power sharing device
04/21/1998US5742795 Method of initializing and updating a network model
04/21/1998US5742515 Asynchronous conversion method and apparatus for use with variable speed turbine hydroelectric generation
04/21/1998US5742103 External line harmonics reduction module for power supplies
04/16/1998WO1998015906A2 Control equipment for an electric power network
04/15/1998CN1038084C Process and arrangement for limiting short circuit current on an electric energy line
04/08/1998CN2278301Y Compensator for instantaneous potential drop
04/08/1998CN2278298Y Automatic compensator for lead end transforming
04/07/1998US5737232 Power supply arrangement for a control circuit
04/07/1998US5737206 Control system for power conversion system
04/07/1998US5737198 Hybrid active power filter with programmed impedance characteristics
04/07/1998US5737166 Protective equipment in a bipolar HVDC station
04/07/1998US5736838 High speed power factor controller
04/01/1998EP0833424A2 Live AC mains power selector for redundant systems
03/1998
03/31/1998US5734586 System for achieving optimal steady state in power distribution networks
03/31/1998US5734257 Transmission line power controller with a continuously controllable voltage source responsive to a real power demand and a reactive power demand
03/31/1998US5734256 Apparatus for protection of power-electronics in series compensating systems
03/31/1998US5734255 Control system and circuits for distributed electrical power generating stations
03/31/1998US5734230 Fail-safe lighting system with load shedding and dimming
03/26/1998WO1998012797A1 Interconnection system for electrical systems having differing electrical characteristic
03/25/1998EP0770232B1 Guide system for a power station
03/25/1998CN2277140Y Dynamic a.c power wave filter
03/25/1998CN2277139Y A.C power wave filter
03/25/1998CN2277135Y Multifunctional household power-saving electric energy administrative device
03/24/1998US5731965 Power line harmonic reduction by hybrid parallel active/passive filter system with square wave inverter and DC bus control
03/24/1998US5731688 Control system and circuits for distributed electrical-power generating stations
03/19/1998WO1998011645A1 Hybrid solid state switch
03/18/1998EP0829942A2 Method and apparatus for controlling and monitoring electrical consumers
03/18/1998CN2276680Y Reactive power compensating gear
03/17/1998US5729421 Circuit analyzing system
03/17/1998US5729118 Variable speed induction generator-motor with controllable excitation frequency
03/17/1998US5729059 Digital no-break power transfer system
03/12/1998DE19635960A1 Wind power plant to mains connection
03/10/1998US5726873 Control circuit for cryogenically-cooled power electronics employed in power conversion systems
03/10/1998US5726561 Voltage selection apparatus and methods
03/10/1998US5726504 Apparatus and method for adaptively canceling harmonic currents in a power line
03/05/1998WO1998009359A1 Secure voltage bus
03/04/1998CN1175324A Series compensator inserting real and reactive impedance into electric power system for damping power oscillations
03/04/1998CN1175323A Dynamic power and voltage regulator for an ac transmission line
03/04/1998CN1175114A Method for correcting harmonic distortion
02/1998
02/26/1998WO1998008288A1 Apparatus and method for optimizing power distributed in a broadband signal system
02/25/1998EP0824779A2 Process and circuitry to cover peak energy demands in electric alternating or three-phase current networks
02/25/1998EP0824777A2 Process and device for the static and dynamic support of a mains voltage by means of a static compensator with a self-commutated converter
02/25/1998EP0782784B1 Process for regulating a four-quadrant regulator operating as a mains converter
02/25/1998CN1174438A Voltage-regulating reactive compensator
02/24/1998US5721675 Power supply converting circuit
02/18/1998CN1173757A Electric distribution system operating equipment
02/18/1998CN1173756A Power inverter
02/17/1998US5719787 Method for on-line dynamic contingency screening of electric power systems
02/17/1998CA2120286C Dc/dc conversion circuit
02/11/1998EP0823057A2 Process for monitoring a three-phase mains for a change in the tuning of the arc supression coil
02/11/1998CN1173061A Protection system for power receiving station
02/10/1998US5717580 Method and control arrangement for DC transmission, and a control device
02/05/1998WO1998005109A1 Method and device for maintaining electric power supply in a multiphase electric energy distribution network
02/04/1998EP0822635A2 Protection system for power receiving station
02/03/1998US5715151 Control and protection system for AC-DC conversion system
01/1998
01/29/1998WO1998004024A1 Electrical power transmitting system with reduced feeder size and method of operation
01/29/1998DE19730185A1 Reactive current and/or harmonic components compensation method e.g. for power electronics
01/29/1998DE19630432A1 Network-coupled photo-voltaic power plant
01/29/1998CA2261076A1 Electrical power transmitting system with reduced feeder size and method of operation
01/28/1998EP0821460A2 Current source
01/28/1998EP0565698B1 Reduction of disturbances in a power network
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