STATIC VAR GENERATOR WITH OVERVOLTAGE PROTECTION FOR THE SWITCHED CAPACITORS THEREOF

摘要

48,723 A static VAR generator of the type which includes as part thereof a discretely switched capacitive bank is taught. The aforementioned arrangement includes a thyristor switch across which is connected in parallel circuit relationship a non-linear resistive device or the like which has a voltage breakdown level which allows current to be conducted therethrough when the voltage across the switch reaches an abnormally high value for the switch. Nevertheless, the capacitive device may be disconnected from the circuit it serves quickly and efficiently by using the non-linear resistive device to discharge the electrical charge stored therein at an appropriate subsequent half cycle.