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)
10/1988
10/12/1988CN87207705U Optimally-operating device for high-tension network
10/11/1988US4777379 Power cycling apparatus
10/05/1988EP0285532A1 Fault detector device in a three-phase network supplying leads by full wave trains
10/05/1988EP0284604A1 Synchronizing circuit for a plurality of power units.
10/05/1988CN88202036U Electric power system fluted coupling using frequency or speed as signal
10/05/1988CN86206116U Device of controlling reactive power voltage
10/04/1988US4775924 Inverter commutation failure prevention method and apparatus
10/04/1988US4775800 Power-supply apparatus
10/04/1988CA1242756A1 Signal generating circuit for reactive energy compensation of an arc furnace
09/1988
09/28/1988EP0284006A1 Reactive power compensation system
09/21/1988EP0282577A1 Energy management system.
09/21/1988EP0282572A1 Responder unit for energy management system
09/13/1988US4771225 Device for limiting switching frequency of a parallel capacitor reactive power compensation network
09/13/1988US4771185 Power adapter for electrical installations and especially domestic installations
09/07/1988EP0280793A1 Method and apparatus for the automatic paralleling of transformers
09/07/1988CN87212773U Centralized-controlled rationing device for dual-electricity-limiting of individual households
09/06/1988US4769751 Control method for an extra high voltage d-c transmission connecting two three-phase networks
09/06/1988US4769587 Power factor control with overvoltage and undervoltage override control in a capacitor control system for a distribution system
09/06/1988US4769555 Multi-time delay power controller apparatus with time delay turn-on and turn-off
08/1988
08/31/1988EP0280382A2 Inverter control method and apparatus
08/31/1988CN87213701U Time selection controlled fixed consumption electric power supplying device
08/30/1988US4767941 Method for error-protected actuation of the switching devices of a switching station and an apparatus thereof
08/25/1988WO1988006378A1 Power generating system
08/24/1988EP0279137A1 Dissipating low pass filter
08/24/1988CN88100909A Arrangement for transferring electric power
08/23/1988US4766360 Induction generator/motor system
08/23/1988US4766327 Circuit and method for synchronizing power sources in a parallel AC electrical power system
08/18/1988DE3703833A1 Method of heating, regulating and optimising for heating individual rooms
08/17/1988EP0278491A2 Power converter
08/10/1988CN87214800U Wbx-type compensation box with low voltage separated capacitors
08/09/1988US4763015 Appliance/refrigerator power controller
08/09/1988CA1240364A1 Device for generating a signal indicative of a fault in an electrical circuit connected to a power mains
08/03/1988CN86108436A Strongly-adaptive control method and apparatus for the stability of a large power system
08/02/1988US4761726 Variable speed constant frequency power system with boost converter auxiliary output
08/02/1988US4761563 Asynchronous multiphase switching gear
07/1988
07/27/1988EP0276181A1 Method and device for checking faulty conductors of an electrical line
07/27/1988EP0275645A2 Clock control system and method for a parallel variable speed constant frequency power system
07/27/1988EP0275486A2 Circuit arrangement for the distribution of power among a plurality of functional units
07/26/1988US4760276 Power supply system, for segmented loads, having phantom redundancy
07/20/1988CN87100007A Single chip microprocessor wattless power controller
07/19/1988US4758962 Electrical power line and substation monitoring apparatus and systems
07/12/1988US4757415 Power active filter employing positive sequence filtering
07/06/1988EP0273598A2 DC link variable speed constant frequency parallel power system and control method
07/06/1988CN86108698A Power factor calibration system working in accordance with counting and cycling mode
07/05/1988US4755738 Reactive power compensation apparatus
06/1988
06/28/1988US4754161 Circuit and method for paralleling AC electrical power systems
06/28/1988US4753932 Antiglucocorticoid activity
06/21/1988US4752726 Reactive power compensation device
06/21/1988US4752697 For producing thermal and electrical energy
06/16/1988WO1988004494A1 Peak power shaving apparatus and method
06/15/1988EP0118418B1 Circuit arrangement for compensation of fast changing reactive power, in particular on the point of consumers, which generate harmonics
06/01/1988EP0268697A1 Method and system for reducing the peak power of supply and disposal systems using transmission items
06/01/1988CN87204933U Df-2 electric power load distributor
05/1988
05/19/1988DE3638881A1 Hybrid drive system
05/19/1988DE3637667A1 Method and device for compensating for reactive current in an AC network
05/10/1988US4743832 Protection system for thyristor-controlled reactors
05/04/1988CN87208588U Multifunctional automatical shut-down device with power-factor compensation function
05/03/1988US4742288 Control system for AC motor/generator of secondary AC excitation type
04/1988
04/27/1988EP0265342A2 Distribution energy management system
04/26/1988US4741023 On-line test and diagnostic system for power system stabilizer
04/26/1988CA1235741A1 Method and system for controlling an ac-dc converter system
04/20/1988CN86209324U No load energy-saving device of power distribution transformer
04/12/1988US4737903 Electronic apparatus
04/12/1988US4737617 Power control for cooking appliance with transient operating modes
04/12/1988CA1235184A1 Tieline control
04/07/1988WO1988002584A1 Responder unit for energy management system
04/07/1988WO1988002583A1 Energy management system
04/05/1988US4736116 Power-up sequencing apparatus
03/1988
03/30/1988EP0258314A4 Scheme for rapid adjustment of network impedance.
03/23/1988EP0260504A2 Reactive power compensation circuit
03/23/1988EP0260474A1 Power supply adapter systems
03/22/1988US4733341 Plural inverter synchronizer and control apparatus
03/22/1988US4733340 Apparatus for stabilizing turbine-generator shaft torsional oscillations
03/22/1988US4733156 Power system stabilizing apparatus
03/16/1988EP0259805A2 Reactive power compensation apparatus
03/15/1988US4731690 Real load unbalance protection system for parallel variable speed constant frequency electrical power systems
03/15/1988US4731547 Peak power shaving apparatus and method
03/09/1988EP0258314A1 Scheme for rapid adjustment of network impedance.
03/08/1988US4730154 For mounting on land or on a vehicle
03/08/1988US4730122 Power supply adapter systems
03/02/1988CN86105273A Power factor regulating
03/02/1988CN86101664A New main junction of power system of electric railway
03/01/1988US4728806 DC link variable speed constant frequency power source paralleling controls
03/01/1988CA1233546A1 Remote load control relay processor
03/01/1988CA1233545A1 Arrangement for sensing remote binary inputs
03/01/1988CA1233509A1 Twelve pulse ac motor drive
02/1988
02/24/1988CN86205616U Power factor regulator
02/23/1988US4727467 Procedure and device to operate an HVDC transmission short coupling in the event of power system faults
02/23/1988US4727466 For converting DC power to AC power
02/23/1988CA1233228A1 Method for determining the time of reclosing a circuit breaker and device for carrying out this method
02/23/1988CA1233200A1 Method and apparatus for resumption of normal operation of a high-voltage d. c. transmission line
02/23/1988CA1233199A1 Method and apparatus for high-voltage d. c. transmission with a bypass circuit for malfunctions
02/23/1988CA1233198A1 Method and apparatus to operate a high-voltage dc transmission system (hvdc) with automatic control of the converters
02/18/1988DE3627189A1 Alternating-current network
02/16/1988CA1232944A1 Control method and control apparatus of phase
02/11/1988DE3718529A1 Arrangement for paralleling invertors on on-board networks
02/10/1988CN86205336U Automatic reactive power compensation equipment by forced varying electric current
02/10/1988CN86200176U Automatic power network disconnecting device avoiding backward power supply for a self-providing power plant
02/09/1988US4724502 Power transmission system with current limiting devices
02/09/1988US4724391 Method for determining the time of reclosing a circuit breaker and device for carrying out this method
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