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)
04/1979
04/03/1979US4147296 Proportional demand limit controller
03/1979
03/27/1979US4146923 Energy monitor and control system
03/27/1979US4146836 Power monitor
03/13/1979CA1050612A2 Electrical demand limiting system
03/06/1979US4143315 Rms transducer and voltage regulating system employing the same
03/06/1979CA1050125A1 Synchronous demodulator circuit
02/1979
02/27/1979US4142230 Sealed DC power converting station
02/27/1979US4141407 Power demand limiting circuit
02/20/1979US4141069 Time dependent power demand control method
02/20/1979US4140959 Electrical power generating system
02/13/1979US4139780 Multi-channel generator drive system
02/13/1979US4139723 Power control unit for a single phase load with slightly changing impedances
02/06/1979US4138607 Dual priority temperature control
02/06/1979CA1048107A1 Method and apparatus for the static compensation of reactive power
01/1979
01/30/1979US4137557 Automatic cut-out device
01/23/1979US4136393 Method of power demand control with time dependent target
01/23/1979US4136286 Isolated electrical power generation system with multiple isochronous, load-sharing engine-generator units
01/23/1979CA1047109A1 Alternating current power transmission systems
01/16/1979US4135128 Apparatus for sensing the reactive or real components of current
01/16/1979US4135101 Method and apparatus for controlling loads in electric power systems by reduction of peak loads
01/02/1979US4133026 Method of starting up a high-voltage d-c inverter or transmission station in isolated or island operation
12/1978
12/26/1978US4131844 Static voltage balancer
12/26/1978CA1045202A1 Phase shifter
12/12/1978US4129809 Power factor corrected dual converter motor drive
12/12/1978CA1044320A1 Method of reducing current unbalance in a three-phase power transmission line operating with one faulty phase
11/1978
11/28/1978US4127805 Device for connecting tuned power transmission line to a.c. network
11/28/1978CA1043418A1 Electric cable power transmission lines
11/21/1978US4126892 Selective voltage and current control for high voltage D.C. transmission systems
11/21/1978US4126792 High-voltage network for areas of increased intensity of icing
11/21/1978CA1042984A1 System and method for generation and distribution of electrical and thermal energy, and automatic control apparatus suitable for use therein
11/14/1978US4125884 Apparatus for detecting subsynchronous current in power systems
11/14/1978US4125782 Demand/schedule controller
11/14/1978CA1042505A1 Electrical demand limiting system
11/07/1978US4124805 Pollution-free power generating and peak power load shaving system
11/07/1978CA1042073A1 Reactive current compensating apparatus for electric power systems
10/1978
10/24/1978US4122512 Superconductive energy storage for power systems
10/24/1978CA1041172A1 Phase shifter
10/17/1978US4121150 Gain compensation for power factor in line current regulating systems involving reactive power
10/17/1978US4121111 Apparatus for detection of synchronism by means of vector difference measurement
10/10/1978US4119866 High voltage electrical network with DC ice-melting device and current return through ground
10/03/1978US4118635 Synchronization system for a combined cycle electric power plant
09/1978
09/26/1978US4117537 System and method for limiting energy consumption
09/26/1978CA1039352A1 Method and apparatus for compensating reactive power
09/26/1978CA1039351A1 Energy transmission system with a common main for direct current
09/19/1978CA1038925A1 Direct current transmission with two parallel circuits
09/12/1978US4114048 Load balancing system for ups rectifiers
09/12/1978CA1038450A1 Reactance controller
09/05/1978CA1038029A1 Alternating current transmission
08/1978
08/29/1978US4110632 Device, method and system for controlling the supply of power to an electrical load
08/22/1978CA1037115A1 Apparatus for stabilization of electrical power supply mains
08/08/1978US4106097 Energy conservation control method
08/08/1978US4106085 HVDC Floating current order system
08/08/1978US4106071 Apparatus for protection against subsynchronous currents in a power system
08/08/1978US4105963 Brushless welding generator
08/01/1978US4104576 Equipment with controlled reactance
08/01/1978US4104539 Parallel redundant and load sharing regulated AC system
07/1978
07/18/1978US4101886 Apparatus for conserving energy in electrical appliances
07/11/1978US4100428 Control system for limiting the electrical consumption of a distribution network
07/11/1978US4100426 Load controlling means
07/04/1978US4099068 Power supply interruption detecting circuit
07/04/1978US4099036 Remote power supply system for a coaxial line with repeaters subjected to the influence of external electric fields
06/1978
06/20/1978US4096436 Power monitor
06/20/1978US4096431 Disconnecting thyristors from thyristor controlled reactance
06/20/1978US4096395 Automatic transfer control device and voltage sensor
06/06/1978US4093997 Portable programmer for time-of-day metering register system and method of using same
05/1978
05/16/1978US4090093 Load controller
05/16/1978US4090090 Automatic transfer control device and frequency monitor
05/16/1978US4090088 Power management system
05/16/1978US4090062 Energy demand controller and method therefor
05/09/1978US4088940 Device for cutting out loads in a generator and battery fed plant
04/1978
04/25/1978US4086425 Three-phase cable system with compensation of longitudinal voltages induced in accompanying return-flow pipes for cooling water
03/1978
03/28/1978US4081691 Controller for a multiple stage power device having interchangeable control units
03/21/1978US4080559 Torsional protective device for power system stabilizer
03/07/1978USRE29569 Spare transformer connecting means
02/1978
02/14/1978US4074180 Electric current generator arrangements
02/14/1978US4074174 Controlling apparatus for asynchronous motors with wound rotor
01/1978
01/10/1978US4068159 Fast current measurement apparatus for static VAR generator compensator control circuit and method for using same
01/03/1978US4066913 Electric load distributor
12/1977
12/20/1977US4064485 Digital load control circuit and method for power monitoring and limiting system
12/20/1977US4064419 Synchronous motor KVAR regulation system
11/1977
11/29/1977US4060709 Power supply control
11/22/1977US4059772 Waste energy source utilization circuit and method
11/22/1977US4059747 Demand controller
11/08/1977US4057736 Electrical power generation and distribution system
11/01/1977US4056768 Static convertor plant
10/1977
10/25/1977US4055795 Correction system for regulating the power factor of an electrical network
10/11/1977US4053820 Active filter
10/04/1977US4052648 Power factor control system for ac induction motors
09/1977
09/20/1977US4048812 Solar-energy conserving
09/06/1977US4047097 Apparatus and method for transient free energization and deenergization of static VAR generators
09/06/1977US4046532 Refrigeration load shedding control device
08/1977
08/16/1977US4042969 Electric cable power transmission lines
08/16/1977US4042968 High-voltage electrical installation
08/09/1977US4041370 Apparatus for rapidly detecting and calculating the root mean square of electrical measuring values in alternating current networks
07/1977
07/12/1977US4035108 Axial flow pump for a pivotal rotor
07/05/1977US4034233 Off states of a plurality of loads
06/1977
06/21/1977US4031407 System and method employing a digital computer with improved programmed operation for automatically synchronizing a gas turbine or other electric power plant generator with a power system
06/21/1977US4031406 Method and apparatus for controlling electrical loads
06/07/1977US4028614 High speed control of reactive power for voltage stabilization in electric power systems
06/07/1977US4028592 Means for increasing the stability in high-voltage power supply networks
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