In this paper

a new method on suppressing the recovery overvoltage of shunt capacitor switch based on fast discharge is proposed from the generation mechanism of recovery overvoltage in the switching of shunt capacitor and with fast discharge of DC residual voltage of capacitor as entry point

and the sample of the suppressor is researched and developed. The key performance of the suppressor is tested through single performance and complete effect test. It is verified that the suppressor can discharge residual voltage of capacitor and can reduce the recovery voltage factor of shunt capacitor switch below2.2 times

reduce the recovery overvoltage times and sustaining time of shunt capacitor switch so to reach the aim of reducing restrike probability. The creation and practicability of the recovery over voltage suppressor of the shunt capacitor switch is actually verified.