The analysis of high-speed repulsion actuator and performance comparisons with permanent magnetic actuator in vacuum circuit breaker

The high-speed operation switchgears are required by more and more situations in power system, such as high-speed DC circuit breaker and some power-transfer locations. In this paper, a novel vacuum circuit breaker with high-speed repulsion actuator is designed, where, the characteristics of high-speed repulsion actuator are analyzed with finite element method (FEM) through changing design parameters of repulsion actuator, and good trends for generating bigger force are given. The performance comparisons with permanent magnetic actuator (PMA) are also given in this paper, experiments shows that vacuum circuit breaker (VCB) based on high-speed repulsion actuator can present good operate performance than PMA.