Simulation and analysis of a HVDC vacuum circuit breaker based on artificial current zero

Abstract

HVDC interruption technique is the bottleneck problem of flexible HVDC project. The HVDC vacuum circuit breaker based on artificial current zero is a feasible and effective method to solve this problem. In this circuit breaker, the parameters of the commutation branch have a vital influence for the breaking process. In this paper, the interruption process for HVDC based on artificial current zero is modeled and simulated. The influence of commutation branch parameters on interruption process is studied. The simulation results under different conditions are analyzed. Based on the analysis, this paper puts forward the reasonable parameters of the commutation branch, which could improve the breaking ability of the circuit breaker.