This paper introduces a new type of circuit breaker, which is used for medium voltage DC operation and is the target application of future ship power system. Circuit breaker uses Z-source LC circuit.

So as to automatically reverse the main path SCR during a fault. Compared with the existing DC circuit breakers, Z-source circuit breakers have the characteristics of quick turn-off and simple control, while source circuit breakers are not.

Do not experience fault current. The operation and analysis of the new circuit breaker are introduced. Component selection is carried out for three medium voltage power levels. It also explores the combination of new circuit breakers in the drive system. Laboratory verification is carried out on a low-voltage prototype.