Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663)
01/1998
01/28/1998CN1171863A Transmission line power flow controller with unequal advancement and retardation of transmission angle
01/27/1998US5712572 Insulation state measurement method, insulation state judgement apparatus, and dispersion type power generating system using the same
01/22/1998WO1998003023A1 Processing data signals
01/22/1998WO1997045926A3 An electric high voltage ac machine
01/22/1998WO1997045921A3 Electromagnetic device
01/21/1998EP0820137A2 Apparatus and method for the compensation of reactive current
01/21/1998EP0565681B1 Control of power network
01/21/1998CN2273073Y Auto-controlled compensation type high-efficiency electricity saver for motor
01/21/1998CN2273071Y Reactive compensator for multiplex phase interruption sound and light alarm and automatic power cut-off arrangement
01/21/1998CN1171088A Reserve power system
01/21/1998CN1170984A Passive power factor compensator
01/20/1998US5710691 For protecting an appliance receiving power from a household power socket
01/20/1998US5710492 Apparatus for monitoring and stabilizing power swing in a power system by utilizing a power electronics technique
01/15/1998WO1997045907A3 Rotating electrical machine plants
01/14/1998CN2272626Y High voleage line reactive compensation automatic switch device
01/14/1998CN1170262A Power source linkage of system
01/14/1998CN1037052C Power converter with star configured modules
01/13/1998US5708590 Method and apparatus for real time recursive parameter energy management system
01/08/1998DE19620906A1 Windenergiepark Wind Energy Park
01/07/1998EP0817362A2 Multiple output, zero voltage switching, series resonant VHF inverter
01/07/1998EP0817350A2 Power-supply system involving system interconnection
01/07/1998CN1169610A Power inverter having three or more parallel driven PWM-type power inverting units
01/06/1998US5706207 Control equipment for electrical power generators
01/06/1998US5706158 Method for short-circuit current limiting on an electrical power transmission line and configuration for short-circuit limiting
01/02/1998DE19648657C1 Arrangement for controlling and monitoring electrical loads
01/02/1998DE19624809A1 Active filter for compensating rapid power fluctuations in three=phase network
12/1997
12/31/1997WO1997050170A1 Independent load sharing of ac power systems connected in parallel
12/31/1997WO1997050169A1 Wireless selective tripping of ac power systems connected in parallel
12/31/1997CN1169050A Stable ac network able for anti reactive load undulation, and reactive power compensating device
12/30/1997US5703791 Electric power system stabilization control apparatus and method thereof
12/30/1997CA2158374C Method and closed-loop control arrangements for the transmission of direct current
12/30/1997CA2126392C Combined phase-shifting directional zero phase sequence current filter
12/30/1997CA2110724C Vernier control system for subsynchronous resonance mitigation
12/24/1997WO1997049168A1 Power line harmonic reduction by hybrid parallel active/passive filter system with square wave inverter and dc bus control
12/24/1997WO1997049167A1 Filter equipment
12/24/1997WO1997049157A1 Method and device for compensation of reactive power
12/23/1997US5701241 Recovery of transmitted power in an installation for transmission of high-voltage direct current
12/23/1997US5701239 High-voltage direct current transmission installation having a high voltage regulation capability
12/23/1997US5699666 Steam generating power station, process for operating the same, and interlinking network and process for its operation.
12/18/1997WO1997048174A1 A method and an apparatus for filtering an electric current supplied to a motor
12/18/1997WO1997048161A1 Real-time pricing control system and methods regarding same
12/18/1997CA2257886A1 Real-time pricing control system and methods regarding same
12/17/1997EP0813292A2 Power inverter having three or more parallel driven PWM-type power inverting units
12/17/1997EP0813284A2 Process for stabilizing of an AC network against reactive power fluctuations and reactive power compensating apparatus
12/17/1997EP0671066B1 Apparatus and method for charging electric vehicles
12/17/1997CN1168016A System networking electric generator
12/16/1997US5698969 Apparatus and method for interline power flow control
12/10/1997CN1167289A Voltage reactive comprehensive controller by microcomputer
12/09/1997US5696695 System for rate-related control of electrical loads
12/04/1997WO1997045926A2 An electric high voltage ac machine
12/04/1997WO1997045921A2 Electromagnetic device
12/04/1997WO1997045909A1 Photovoltaic to grid interconnection
12/04/1997WO1997045908A1 Wind power site
12/04/1997WO1997045907A2 Rotating electrical machine plants
12/04/1997WO1997045906A1 Reduction of harmonics in ac machines
12/04/1997WO1997045905A1 An installation for power transmission by means of high-voltage direct current, comprising device for detection of a permanent ground fault
12/04/1997WO1997045848A1 A dc transformer/reactor
12/04/1997WO1997045847A1 Transformer/reactor
12/04/1997DE19621333A1 Method and equipment for controlling domestic AC loads
12/04/1997CA2256535A1 Rotating electrical machine plants
12/04/1997CA2256469A1 Transformer/reactor
12/04/1997CA2256347A1 Electromagnetic device
12/04/1997CA2255742A1 A dc transformer/reactor
12/04/1997CA2255739A1 An electric high voltage ac machine
12/03/1997EP0810713A2 Apparatus and method for detecting an inverter islanding operation
12/03/1997EP0810711A2 Microprocessor control of parallel power supply systems
12/03/1997EP0809879A1 Method and device for filtering and damping conducted interference caused by ultimate consumers
12/03/1997EP0809876A2 Series-compensated converter station
12/03/1997CN2269652Y Power socket for absorbing peak pulse
12/03/1997CN1166911A System and method for optimizing energy efficiency of building system for target energy consumption level
12/02/1997US5694309 Synchronization of power converter arrays
12/02/1997US5694306 Method and device for control of a series-compensated converter station
12/02/1997US5693988 Filtering device
11/1997
11/27/1997DE19620586A1 Uninterrupted current supply (UCS) system on board ship with two electrical plants
11/26/1997CN2269020Y Electric power monitor
11/26/1997CN1166242A Interconnection system for transmitting power between electrical systems
11/26/1997CN1166080A Switched-mode power supply having standby mode
11/26/1997CN1166078A Output voltage compensating circuit
11/25/1997US5692158 Methods for generating models of non-linear systems and components and for evaluating parameters in relation to such non-linear models
11/25/1997US5691626 Active damping control for active power filter
11/25/1997US5691577 Reflector-pump network for preempting AC power supply harmonic distortion and for satiating the complex harmonic power demand of a rectifier
11/20/1997WO1997043811A1 Method for on-line dynamic contingency screening of electric power systems
11/19/1997EP0808012A1 Method for managing the tariff of electrical power in a network of a room
11/19/1997EP0807329A1 Dynamic power and voltage regulator for an ac transmission line
11/19/1997CN2268340Y Electricity-saving starting compensator for ac. asynchronous motor
11/13/1997DE19618874A1 Relaying, distributing and storing of energy
11/13/1997DE19617915A1 Power distribution arrangement esp for powering loads in aircraft
11/13/1997DE19612744C1 Transformatoranordnung Transformer assembly
11/12/1997EP0806314A1 Hybrid power system with clutches for drive mode control
11/12/1997EP0689689A4 Energy saving power control system
11/11/1997US5687139 Electrical load optimization device
11/11/1997US5687071 Voltage lowering device and asynchronous traction system supplied from a single-phase mains supply incorporating a device of this kind
11/11/1997US5686767 Apportioning minimal standby power
11/11/1997US5686766 Utility-linking system
11/06/1997DE19654830A1 Electric power converter control appts
11/05/1997EP0805547A2 Reflector-pump network for preempting AC power supply harmonic distortion and for satiating the complex harmonic power demand of a rectifier
11/04/1997US5684710 System for measuring electrical power interruptions
11/04/1997US5684389 Switch-off method for a three-phase reactive power compensator with two thyristor switches
11/04/1997US5684379 Device and procedure for recharging electric vehicles
10/1997
10/29/1997EP0803146A1 Structure and method for performing active injection mode filtering on an ac power system