H - Electricity – 02 – H
Patent
H - Electricity
02
H
H02H 7/08 (2006.01) H02J 3/18 (2006.01) H03K 17/00 (2006.01) H03K 17/10 (2006.01) H03K 17/79 (2006.01)
Patent
CA 2067557
Abstract of the Disclosure 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 trigger 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). Each trigger circuit also includes an energy storage capacitor (324) connected in series with these resistors. The solid state switches are selectively energized only when the potential on the distribution line is about at a peak negative value, i.e., when the voltage across the solid state switches is at a minimum, so that substantially a zero charge current flows through the solid state switches when initially gated on. 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 gating signals that turn on the pair of serially connected solid state switches (350). Once energized, the solid state switches conduct electrical current between the compensation capacitor and ground until the solid state switches are reversed biased by the potential on the distribution line. The number of optically triggered solid state switches required to control the charge current for the compensation capacitor depends upon the rating of the solid state switches used and the voltage of the distribution line.
Andexler George
El-Sharkawi Mohamed A.
Silberkleit Lee I.
Perley-Robertson Hill & Mcdougall Llp
The Board Of Regents Of The University Of Washington
LandOfFree
Optically triggered high voltage switch network and method... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optically triggered high voltage switch network and method..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically triggered high voltage switch network and method... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1343368