Investigation of a magnetic induction current commutation module for DC circuit breaker

Due to the favorable features of rapid breaking operation and short arcing period, the DC circuit breakers based on the principle of current commutation have attracted great attentions in the fault clearance of DC system. In these breakers, the current commutation between paths plays a vital role in determining the success or failure of interruption. To realize the commutation reliably and economically, we have proposed an innovative magnetic induction current commutation module (MICCM), which produce the active current injection by electromagnetic induction. The structure of MICCM is presented, and the influence of main structural parameters on circuit characteristics is investigated by the numerical study. Finally, after applying to the breaker, the fault current breaking simulation for 10 kV MVDC system has been conducted, which validates the feasibility and effectiveness of MICCM.