A Bidirectional Multi-Port Solid-State Circuit Breaker Topology Based on B-TRAN

With the increasing adoption of DC microgrids, multi-port applications are becoming more prevalent. Solid-state circuit breakers (SSCBs) play a critical role in protecting multi-port networks. However, many existing high-performance SSCB topologies require a large number of semiconductor devices when applied to multi-port scenarios. This leads to drawbacks in terms of cost, physical size, and overall efficiency. To address these issues, this paper proposes a novel bidirectional multi-port solid-state circuit breaker topology based on B-TRAN devices. The proposed design significantly reduces the number of required devices while maintaining effective system protection. The key feature of this topology lies in the use of B-TRAN devices to enable bidirectional current conduction, and it requires only a single energy absorption branch to handle fault energy from all ports. The effectiveness and performance of the proposed SSCB are verified through simulation.