| Patents for H02J 3 - Circuit arrangements for ac mains or ac distribution networks (38,663) |
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| 02/09/1988 | US4724333 Method and means for damping supersynchronous oscillations in an ac power system |
| 02/09/1988 | US4723735 Energy storage attitude control and reference system |
| 02/02/1988 | US4723189 Negative sequence detector for a continuous wave frequency transducer |
| 01/27/1988 | EP0254098A1 Method for regulating the bulk of energy of a user comprising several consumers |
| 01/27/1988 | EP0254073A2 Harmonic suppressing device |
| 01/26/1988 | US4721897 Reactive power processing circuit for a current source GTO invertor |
| 01/26/1988 | CA1232012A1 Switching arrangement for increasing stability in a polyphase ¬e.g., 3-phase| power system fed by a generator |
| 01/20/1988 | CN85106414B Control device for ac-dc converter |
| 01/12/1988 | US4719402 VAR generator system with minimal standby losses |
| 01/12/1988 | US4719364 Multiple time delay power controller apparatus |
| 01/05/1988 | US4717998 Static device for control of energy-exchange between electrical generating and/or receiving systems |
| 12/23/1987 | EP0250320A2 Power adapter for electric installations, especially domestic ones, with carrier frequencies control |
| 12/22/1987 | CA1230643A1 Reactive-power compensator for compensating a reactive-current component in an alternating-voltage system |
| 12/17/1987 | DE3718456A1 Method for increasing the load carrying capability of installed low-voltage power distributor systems by means of central control of the switching of periodic loads |
| 12/15/1987 | CA1230374A1 Electronic grounding system for electrical distribution systems |
| 12/09/1987 | CN87101640A Device for stabilizing torsional-vibration of turbogenerator shaft |
| 12/09/1987 | CN86103586A Dual tunning low energy consumption filtering device and method |
| 12/08/1987 | US4711394 Multiple-unit HVAC energy management system |
| 12/01/1987 | US4710735 Absorption circuit |
| 12/01/1987 | US4710697 Off-line series type regulating power supply |
| 12/01/1987 | CA1229876A1 Controllable risk parameter for device control system |
| 11/24/1987 | CA1229659A1 Protective circuit for thyristor switches used in static var generators |
| 11/19/1987 | EP0245651A2 Method of damping at least one electrical harmonic of the power frequency in a multiphase AC power system |
| 11/18/1987 | CN87102337A Method for continuously adjusting capacity of power capacitor |
| 11/17/1987 | US4707774 Flywheel power source apparatus |
| 11/17/1987 | US4707142 Master clock system for a parallel variable speed constant frequency power system |
| 11/17/1987 | CA1229380A1 Residual charge controller for switched capacitor installation |
| 11/11/1987 | CN86102939A Indoor display equipment for high voltage of 10-35 kv |
| 11/10/1987 | US4706179 Arrangement for switching rectified alternating current |
| 11/04/1987 | CN87206001U Electrical load controller for the peak periods of light |
| 11/04/1987 | CN87202582U Reactive-load compensating device |
| 11/04/1987 | CN86108522A Two-phase or four-phase magnetic positive feedback ascillating power generation and transmission method |
| 11/03/1987 | US4704570 For an a.c. induction motor |
| 11/03/1987 | CA1228908A1 Apparatus for controlling power supply to electronic circuitry |
| 10/28/1987 | EP0242609A1 Interface control level |
| 10/27/1987 | US4703178 Noise erasing apparatus for stimulable phosphor sheet |
| 10/27/1987 | CA1228642A1 Electrical systems comprising temperature sensitive devices |
| 10/22/1987 | WO1987006403A1 Method and device for driving an asynchronous motor with speed control by means of a controlled inverter |
| 10/22/1987 | DE3630540C1 Device for controlling reactive volt-amperes (VAr) |
| 10/21/1987 | EP0241736A1 Firing method for a thyristor circuit |
| 10/21/1987 | CN87200890U Multichannel capacitor compensation system with silicon controlled rectifier |
| 10/21/1987 | CN86104821A Method and device of synchronous frequency difference locking and phase remembrance of remanent voltage of slip over null of generator and electric nework |
| 10/20/1987 | US4701689 Optimal control power system stabilizer and method using simulating state variables |
| 10/15/1987 | DE3612378A1 Circuit arrangement for reducing an interference current which is caused in a load |
| 10/07/1987 | EP0239806A1 Apparatus for stabilizing turbine-generator shaft torsional oscillations |
| 10/06/1987 | US4698581 Reactive power compensation apparatus |
| 10/06/1987 | CA1227831A1 Direct current tight coupling |
| 10/05/1987 | EP0157860A4 Controllable risk parameter for device control system. |
| 10/01/1987 | DE3625502C1 Circuit arrangement for supplying an AC motor or three-phase motor via a pulse-controlled invertor (pulse-width-modulated invertor) |
| 09/30/1987 | EP0239278A2 Capacitor apparatus for reactive power compensation |
| 09/29/1987 | US4697136 Inverter system for inputting alternating current and direct current in combination |
| 09/29/1987 | CA1227577A1 Diagnostic system and method |
| 09/29/1987 | CA1227536A1 Var generator having controlled discharge of thyristor switched capacitors |
| 09/29/1987 | CA1227532A1 Power converter control apparatus and power converter control method |
| 09/24/1987 | DE3708468A1 Method and device for compensating for harmonic loads and/or a reactive load in a supply network |
| 09/24/1987 | DE3610044A1 Device for common asymmetry protection of lossy series-tuned circuits |
| 09/23/1987 | CN87101909A Dc power transmission system |
| 09/22/1987 | US4695932 Superconductive energy storage circuit |
| 09/22/1987 | US4695738 Energy management system |
| 09/22/1987 | US4695737 Microcomputer controlled power regulator system and method |
| 09/16/1987 | EP0237444A1 Circuit breaking relays, especially with "peak period disconnection" |
| 09/16/1987 | EP0237032A2 DC power transmission system |
| 09/15/1987 | US4694192 Simplified demand limit control |
| 09/15/1987 | US4694188 Apparatus for controlling a turbo generator |
| 09/09/1987 | CN86108758A Control apparatus of converter |
| 09/02/1987 | EP0234293A2 Reactive power processing circuit for a current source GTO invertor |
| 09/02/1987 | EP0234040A1 Control process for a quick reactive current compensation of parallel thyristor-controlled inductances |
| 08/25/1987 | US4689752 System and apparatus for monitoring and control of a bulk electric power delivery system |
| 08/25/1987 | US4689735 Power supply for single-phase traction system |
| 08/25/1987 | US4689733 Method for reducing dynamic overvoltages in an alternating-current system to which a direct-current system is connected |
| 08/20/1987 | DE3604996A1 Method for detecting sub-synchronous oscillations on AC voltage cables, and devices for carrying out the method |
| 08/19/1987 | EP0233127A1 Circuit-breaking relay |
| 08/19/1987 | EP0232809A1 Method and device for the parallel switching of branches or networks containing synchronous generators |
| 08/18/1987 | US4687948 Dual mode controller for assigning operating priority of two loads |
| 08/12/1987 | EP0232173A2 Electrical energy-consumption analyser |
| 08/12/1987 | EP0231840A2 Method for the continuous operation of a synchronous generator in parallel with at least one diesel generator of an auxiliary diesel aggregate |
| 08/12/1987 | EP0231528A2 Power system stabilizer |
| 08/12/1987 | EP0128182B1 Method and apparatus for automatically setting the demand phase lag input to an induction-motor power factor controller |
| 08/11/1987 | US4686630 Load management control system and method |
| 08/11/1987 | US4686447 Static var compensators |
| 08/04/1987 | US4684875 Power conditioning system and apparatus |
| 07/30/1987 | WO1987004538A1 Scheme for rapid adjustment of network impedance |
| 07/28/1987 | US4683105 Testable, fault-tolerant power interface circuit for normally de-energized loads |
| 07/14/1987 | US4680692 Control apparatus of AC/DC power converter |
| 07/14/1987 | US4680691 Method and system for preventing an excessive voltage build-up in a power converter system |
| 07/14/1987 | US4680531 Method for attenuating at least one electric harmonic of the system frequency in a multi-phase alternating-current system |
| 07/14/1987 | CA1224246A1 Static var generator having reduced harmonics |
| 07/08/1987 | EP0227924A2 Reactive power regulation device for controlling reactive power and correcting power factor |
| 07/08/1987 | EP0227872A1 A method and system for compensating the electromotive forces of self-induction and mutual induction in a conventional asymmetric high current line |
| 07/08/1987 | CN86107978A Inverse current transformer system common to ac and dc inputs |
| 07/01/1987 | EP0226870A2 Power supply/sink for use with switched inductive loads |
| 06/30/1987 | US4677535 Power conversion system |
| 06/30/1987 | US4677401 Noise filter for three-phase four-wire system |
| 06/30/1987 | US4677364 For a three phase induction machine |
| 06/30/1987 | US4677309 Self-commutated inverter is selectively decoupled from an AC grid |
| 06/24/1987 | EP0226520A1 Method and device to control the supply of loads starting from a three-phase network |
| 06/24/1987 | CN86201355U Automatic power factor compensating unit |
| 06/19/1987 | DE3544230A1 Device for balancing asymmetric loads and for compensating for reactive loads in a three-phase power supply which is loaded in an unbalanced manner |
| 06/16/1987 | US4673823 Apparatus for operating cycloconverters in parallel fashion |
| 06/16/1987 | EP0225657A1 Method for controlling several electrical loads |