Method for Measuring Dynamic Resistance of Reactive Switch Circuit Breakers On - line

Reactive power switch circuit breaker is more likely to be ablated than other circuit breakers because of inrush current and punch through voltage when it is on and off capacitive current, as well as closure and overvoltage when it is on and off inductive current and frequent operation. As a result, the switching performance is reduced and the breaking failure occurs. Therefore, this paper designs the main circuit of reactive power switching circuit breaker under laboratory conditions according to the voltage waveform changes in the actual breaking process of reactive power switching circuit breaker, establishes the simulation platform of reactive power switching circuit breaker breaking test, and uses the non-contact measurement dynamic resistance curve of reactive power switching circuit breaker breaking process to carry out a refined evaluation of the status of the arc extinguishing chamber of reactive power switching circuit breaker.