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)
11/1981
11/24/1981US4302715 Dynamic parallel inductive stabilizer for synchronous machines having torsional oscillations
11/24/1981CA1113146A1 Grounding conductor current minimizing circuitry
11/18/1981EP0040146A1 Power breaker with remote control of the working threshold
11/04/1981EP0039234A2 Computerized control system for an electrochemical plant
10/1981
10/20/1981US4296462 Inverter controller
10/07/1981EP0037087A1 Method and device for connecting and disconnecting without overoscillation a capacitor between two conductors of an AC network
10/07/1981EP0037027A1 Thyristor controlled inductor arrangement
10/06/1981US4293915 Programmable electronic real-time load controller
09/1981
09/29/1981US4292580 Circuit arrangement for attenuation of power oscillations in networks
09/29/1981US4292545 Method and means for damping subsynchronous oscillations and DC offset in an AC power system
09/29/1981US4292543 Electrical energy management devices
09/22/1981US4291264 Power factor control system for inverter-driven a-c induction motor
09/22/1981CA1109515A1 Ornamental lighting control
09/15/1981CA1109123A1 Control system for an installation utilizing pressure energy of outgoing blast-furnace gas
09/08/1981CA1108724A1 Apparatus for conserving energy in electrical appliances
09/08/1981CA1108697A1 Fast current measurement apparatus for static var generator compensator control circuit and method for using same
09/08/1981CA1108696A1 System for operating multiple gas turbines for coordinated dead load pickup
09/02/1981EP0034971A1 Remote programming device for a central heating installation
08/1981
08/19/1981EP0033842A2 Method for mains feedback of a line commutated direct converter and control circuit therefor
08/12/1981EP0033593A2 Power control apparatus
08/11/1981US4283635 Load demand control system
08/11/1981CA1106916A1 Apparatus and method to regulate the power factor of an electrical distribution line
08/06/1981WO1981002227A1 Overhead electric line
08/04/1981CA1106444A1 Reactive power control apparatus
08/04/1981CA1106443A1 Dc power transmission
07/1981
07/28/1981US4281376 Protected converter arrangement
07/21/1981CA1105558A1 Excitation control apparatus for a generator
07/15/1981EP0031861A2 Process for regulating an electric heating system and device for putting it into use
07/14/1981US4279009 Method and regulating device for controlling high-voltage direct current transmission system
07/14/1981CA1105083A2 Stepless control of a.c. power
07/08/1981EP0031594A2 High voltage direct current transmission installation
07/07/1981US4277691 Energy allocator
06/1981
06/30/1981US4276590 Current sharing modular power system
06/30/1981CA1104206A1 Method and system of controlling high voltage direct current power transmission plants
06/23/1981US4275346 Static var system with means for correcting for negative phase shift
06/16/1981US4274043 Efficient, high power battery module; D.C. transformers and multi-terminal D.C. power networks utilizing same
06/09/1981US4272687 Power manageable circuit breaker
06/09/1981US4272012 Method and system for controlling a plurality of temperature conditioning units
06/09/1981CA1102907A1 Load controller
06/03/1981EP0029447A1 Frequency control for ac systems connected in parallel.
06/02/1981US4271386 Power factor controller for induction motor
05/1981
05/26/1981CA1101932A1 Method and apparatus for controlling the real and reactive power behavior of a high voltage d. c. transmission (hdt) system
05/12/1981US4267571 Energy conservation by improved control of bulk power transfers on interconnected systems
05/12/1981CA1101055A1 Hvdc floating current order system
05/05/1981US4266177 Power factor control system for AC induction motors
04/1981
04/28/1981US4264960 System for controlling power distribution to customer loads
04/28/1981US4264951 DC Power transmission control
04/28/1981CA1100200A1 Circuit for compensating harmonic currents in an electric consumer
04/21/1981US4263517 Control method and system for an high voltage direct current system
04/14/1981US4262256 Energy extraction system from a capacitive source with shunt switching regulation
04/14/1981US4262209 Supplemental electrical power generating system
04/14/1981CA1099329A1 Ornamental lighting control
04/08/1981EP0026374A1 Device for transferring high-power electric energy from a higher frequency three-phase supply network to a lower frequency single-phase load network
03/1981
03/31/1981US4259713 High voltage direct current transmission
03/18/1981EP0025404A2 Short-circuiting element for series supply circuit
03/17/1981US4256972 Power transfer relay circuitry and method of phase measurement
03/10/1981US4255700 Control circuit of reactive power compensation apparatus
03/05/1981WO1981000648A1 Current damping arrangements
03/03/1981CA1096942A1 Power monitor
02/1981
02/17/1981US4251766 Method and apparatus for determining the direction of a fault on a power transmission line
02/17/1981US4251736 Method for controlling power flow between an electrochemical cell and a power grid
02/17/1981US4251735 Dual speed control circuit for power flow through an inverter
02/10/1981US4250542 Method for controlling operating conditions of D.C. transmission line and control device for effecting same
02/04/1981EP0023254A2 Method and apparatus for controlling power distribution of an electric utility
02/03/1981US4249088 Automatic device for synchronization of prime mover with electrical grid
01/1981
01/27/1981US4247786 Energy management method using utility-generated signals
01/13/1981US4245319 Energy management method and apparatus utilizing duty cycle reduction synchronized with the zero points of the applied voltage
01/13/1981US4245182 Excitation control apparatus for a generator
12/1980
12/30/1980CA1092649A1 Power control means for a single phase load
12/23/1980US4241261 Circuit control to limit power drain of auxiliary power supply in UPS system
12/23/1980CA1092193A1 Power monitor
12/11/1980WO1980002776A1 Frequency control apparatus for ac machine
12/10/1980EP0020310A1 A remote control direct electric load management system
12/09/1980US4238688 Three-phase uninterruptible power supply maintaining reserve energy sources in idling condition with unbalanced loads
12/02/1980CA1090882A1 Method for starting up a converter station of a high voltage dc transmission system
12/02/1980CA1090881A1 Method for the transmission of dc current between at least one rectifier station and several inverter stations
11/1980
11/18/1980US4234843 Static VAR generator with discrete capacitive current levels
11/18/1980US4234842 Voltage regulator and flicker compensator
11/12/1980EP0018521A1 Device for the uninterrupted supply of alternating current to consumers
11/11/1980US4233546 Stroboscopic beacons fed from a capacitive source
10/1980
10/14/1980US4228492 Circuit arrangement and method for the compensation of harmonic currents
10/14/1980US4228364 Energy management system
10/01/1980EP0016559A1 Electrical generating apparatus and method
09/1980
09/17/1980EP0015666A1 Apparatus for controlling electrical power consumption
09/17/1980EP0015641A2 Power factor improving apparatus for power converter
09/17/1980EP0015330A1 Apparatus and method for controlling electrical power demand
09/17/1980EP0015317A2 Line current supply circuitry for the electrical equipment of a household appliance
09/09/1980US4222097 Control of high-voltage D.C. transmission systems
09/02/1980CA1084992A1 High-voltage direct-current transmitting unit
08/1980
08/26/1980US4219768 Method for regulating the voltage of an electric generator and a system for the application of said method
08/26/1980US4219742 Hybrid dual voltage transmission system
08/26/1980CA1084570A1 High voltage electrical network with dc ice-melting device and current return through ground
08/20/1980EP0014415A2 Process for regulating parallel connected dc/ac converters and circuits for the application of said process
08/19/1980US4218625 Synchronizing check relay
08/12/1980CA1083670A1 Apparatus for detection of synchronism by means of vector difference measurement
08/05/1980US4216384 System for monitoring and controlling electric power consumption
07/1980
07/22/1980US4214289 Stabilizing equipment for power transmission system
07/15/1980US4213058 Load shedding timer for a power management system
07/15/1980CA1081789A1 Portable programmer for time-of-day metering register system and method of using same
07/15/1980CA1081778A1 Static voltage balancer
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