Designing and research of a novel current limiting DC hybrid circuit breaker with the combinatorial electronic switch

In this paper, a current limiting DC hybrid circuit breakers (CB) based on a combinatorial electronic power switch is studied: The combinatorial electronic power switch is designed to reduce the series connecting number of power electronic device; a current limiting circuit is also designed, which inhibits the increasing of fault current. Another contribution of this paper is the parameter designing of the CB and the configuration method of the combinatorial switch. The accuracy of the methods is proved by the simulation results, which demonstrate that the proposed CB can not only limit the current rising rate when the fault occurs, but also significantly reduces the series connecting number of power electronic device. What is more, an experimental prototype is also made to verify the validity and rationality of the current limiting hybrid DC CB proposed in this paper.