Shunt Capacitors Protection Method Based on L-R Damping Principles

When vacuum switches switch off shunt capacitors, the restriking of over voltages may be brought about which will threaten the insulation of equipments severely. The principles of LR device are analyzed and applied to shunt capacitors protection. Electromagnetic Transient Program (EMTP) is used to simulate this kind of over voltages and precaution. Result shows it is a better method to reduce the restriking of over voltages. 