Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663)
03/1997
03/12/1997EP0762624A2 Control system for power converter system
03/12/1997EP0762622A1 High voltage DC link converter control and protection system
03/12/1997EP0762598A2 Transfer switch system with subnetwork
03/12/1997EP0761031A1 Control of an installation for transmission of high-voltage direct current
03/12/1997CN1144983A Urban medium-tension distribution net interconnecting wire-splice system
03/11/1997US5610937 Regulation method for a DC arc furnace
03/11/1997US5610834 Method for improving voltage stability security in a power transmission system
03/11/1997US5610501 Dynamic power and voltage regulator for an ac transmission line
03/11/1997US5610500 Method of converting turbine driven generator into a synchronous condenser
03/06/1997WO1997008802A1 An electric power line and a method of reducing the radiation of high frequency electromagnetic fields therefrom
03/05/1997EP0760177A1 Recovery of transmitted power in an installation for transmission of high-voltage direct current
03/04/1997US5608615 Asynchronous intergrid transfer apparatus
03/04/1997US5608276 Structure and method for performing active injection mode filtering on an AC power system
02/1997
02/27/1997WO1997007581A1 Static var compensator
02/27/1997DE19530825A1 Energy optimising in distribution system with power storage capability
02/26/1997CN1143851A Power converting circuit
02/26/1997CN1143849A High-low voltage capacitor complete compensator
02/25/1997US5606245 Power supply systems
02/20/1997WO1997006590A1 Device for compensating harmonic oscillation currents in a transmission line consisting of several conductors
02/20/1997WO1997006589A1 Thyristor switched capacitor bank
02/20/1997CA2228487A1 Thyristor switched capacitor bank
02/19/1997EP0758498A1 Method for improving voltage stability security in a power transmission system
02/18/1997US5604421 Electrical systems
02/18/1997US5604420 Stabilizer for power system
02/18/1997US5604385 Apparatus for and method of evenly distributing an electrical load across a three phase power distribution network
02/13/1997DE19529302A1 Vorrichtung zur Kompensation von Oberschwingungsströmen einer aus mehreren Leitern bestehenden Übertragungsstrecke Device for compensation of harmonic currents of a multi-conductors transmission line
02/12/1997EP0758153A2 Circuit device for disconnecting a transformer not under load
02/12/1997EP0757855A1 Method for performing a voltage stability security assessment for a power transmission system
02/09/1997CA2182837A1 Transfer switch system with subnetwork
02/08/1997CA2182730A1 Method and circuit for disconnecting a transformer in dependence on whether a load connected thereto requires power, or not
02/06/1997WO1997004521A1 A variable speed wind turbine generator system with zero-sequence filter
02/05/1997EP0757429A1 Switched mode power supply with power factor correction
02/05/1997EP0697120B1 Management equipment for generators of electrical energy
01/1997
01/29/1997EP0755583A1 Installation for transmission of electric power by means of high-voltage direct current
01/28/1997US5598349 Responding to pricing signals from a power supplier using mixed add/shed and profile setback delta schemes
01/28/1997US5598079 A.C. induction devices having tuned compound windings
01/28/1997CA2070614C Reactive power control system
01/23/1997WO1997002639A1 A power transmission system for high-voltage direct current
01/23/1997DE19530826C1 Power output optimisation system for energy distribution system
01/22/1997EP0755111A1 Voltage step-down device and asynchronous traction system fed by a single-phase network using such device
01/22/1997EP0701743B1 Process and device for reducing asymmetric voltages in a three-phase system by means of a static compensator
01/22/1997CN2245815Y Automatic controllor for double-circuit concentrated power supply for wired TV
01/21/1997US5596492 Method and apparatus for de-centralized signal frequency restoration in a distributed UPS system
01/16/1997DE19528766C1 Thyristorgeschaltete Kondensatorbank Thyristor switched capacitor bank
01/15/1997EP0689732B1 Process and regulating arrangements for d.c. transmission
01/15/1997CN1140250A Air conditioner with solar generator
01/14/1997US5594659 Method for performing a voltage stability security assessment for a power transmission system
01/14/1997US5594630 Add-on distortion scrubber for AC power systems
01/14/1997CA2097600C Reduction of disturbances in a power network
01/09/1997WO1996034293A3 Process for monitoring a three-phase mains for a change in the tuning of the arc supression coil
01/09/1997DE19600547A1 Inverter protection circuit for industrial electrical power mains network
01/08/1997CN1033773C High-efficiency relay battery power-supplying system capable of energy storage during non-peak load
01/07/1997US5592394 FET current sensor for active balancing or regulating circuits
01/07/1997US5592369 Device in a d.c. circuit for transfer of a current from one current path to another and for control of the voltage in the circuit
01/07/1997US5592074 Battery power supply system
01/01/1997CN1139307A Power converter protecting apparatus for electric power system
12/1996
12/27/1996WO1996042038A1 Tuned a.c. power systems compensator having variable reflective impedance for linear and non-linear reactive load compensation
12/27/1996EP0750383A1 Automatic user load selection and reset in a "total electric power load management system"
12/25/1996CN1138922A Method and device for compenseation of unblance in a series-compensated converter station
12/24/1996US5587917 Data collection and processing for digital AC power system monitor/analyzer
12/19/1996WO1996040318A1 Power management system for a dialysis machine
12/19/1996WO1996036100A3 Process and circuitry to cover peak energy demands in electric alternating or three-phase current networks
12/19/1996WO1996036097A3 Process and device for the static and dynamic support of a mains voltage by means of a static compensator with a self-commutated converter
12/19/1996DE19616591A1 Power converter unit of voltage source type
12/18/1996EP0749190A2 Interconnection system for electrical systems having differing electrical characteristic
12/18/1996EP0748991A2 Air conditioner with solar generator
12/18/1996EP0748471A1 An electrically controllable inductor
12/18/1996EP0689729B1 Process and regulating arrangement for d.c. transmission
12/18/1996EP0565701B1 Reduction of disturbances in a power network
12/18/1996EP0538298B1 A switchboard
12/18/1996CN1138242A Voltage source type electric power variable flow device
12/17/1996US5586018 Device for suppressing voltage fluctuation and higher harmonics
12/14/1996CA2636690A1 Air conditioner with solar generator
12/12/1996WO1996039736A1 Inverter controlled series compensator
12/10/1996US5583423 Energy saving power control method
12/10/1996US5583419 Power supply systems
12/10/1996CA2056316C Operating control device and method for wound-rotor induction machine
12/05/1996WO1996038896A1 Fail-safe lighting system with load shedding and dimming
12/05/1996DE19544777C1 Control method for converter station of HV DC transmission network
12/04/1996EP0746078A2 Method and apparatus for detecting islanding operation of dispersed generator
12/04/1996EP0746077A2 Power system compensator apparatus and power converter apparatus
12/04/1996EP0745283A1 Converter assembly for power transmission by means of high-voltage direct current
12/04/1996CN2241939Y Reactive compensating automatic controlling relay
12/04/1996CN1137191A Power system compensator apparatus and power converter apparatus
12/04/1996CN1137157A Phase-shifting transformer and protection system of phase-shifting transformer
12/03/1996US5581132 Peak demand limiter and sequencer
11/1996
11/28/1996WO1996037946A1 Power converter drive
11/28/1996WO1996037940A1 Apparatus for and method of evenly distributing an electrical load across a three-phase power distribution network
11/28/1996WO1996037813A1 Adaptive power capacitor controller
11/28/1996DE19619305A1 Controlled electrical power series compensator with capacitor bank
11/28/1996DE19519424A1 Stromrichterantrieb Converter drive
11/27/1996EP0744810A1 A device for setting the priority of an electrical socket
11/26/1996US5579195 Power stoppage minimizing systems for distribution lines and methods of using a distribution line
11/26/1996CA2127157C Reactive power compensating apparatus capable of reducing in switching loss in steady state operation thereof
11/21/1996WO1996021264A3 Energy management and building automation system
11/20/1996EP0671067B1 Method and arrangement for detecting and damping transient oscillations at or near a natural resonant frequency in a power transmission system
11/20/1996CN1136229A Method and device for control of series-compensated converter station
11/20/1996CN1136228A Method and device for control of series-compensated converter station
11/19/1996US5576942 Method and apparatus for reducing the harmonic currents in alternating-current distribution networks
11/14/1996WO1996036100A2 Process and circuitry to cover peak energy demands in electric alternating or three-phase current networks