Optically triggered high voltage switch network and method for s

Details Optically triggered high voltage switch network and method for s Optically triggered high voltage switch network and method for s

1991-05-09

1993-01-19

Voeltz, Emanuel T.

Electricity: power supply or regulation systems

For reactive power control

Using impedance

323209, 323210, 323902, 307633, 307647, G05F 170

Patent

active

051809630

ABSTRACT:
An optically triggered solid state switch and method for switching a high voltage electrical current. A plurality of solid state switches (350) are connected in series for controlling electrical current flow between a compensation capacitor (112) and ground in a reactive power compensator (50, 50') that monitors the voltage and current flowing through each of three distribution lines (52a, 52b and 52c), which are supplying three-phase power to one or more inductive loads. An optical transmitter (100) controlled by the reactive power compensation system produces light pulses that are conveyed over optical fibers (102) to a switch driver (110') that includes a plurality of series connected optical triger circuits (288). Each of the optical trigger circuits controls a pair of the solid state switches and includes a plurality of series connected resistors (294, 326, 330, and 334) that equalize or balance the potential across the plurality of trigger circuits. The trigger circuits are connected to one of the distribution lines through a trigger capacitor (340). In each switch driver, the light signals activate a phototransistor (300) so that an electrical current flows from one of the energy reservoir capacitors through a pulse transformer (306) in the trigger circuit, producing gate signals that turn on the pair of serially connected solid state switches (350).

REFERENCES:
patent: 4785388 (1988-11-01), Takahashi

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