Multiport Hybrid HVDC Circuit Breaker

This paper proposes a new n-port hybrid dc circuit breaker for offshore multiterminal HVDC grid application. The n-port dc circuit breaker can substitute n - 1 hybrid dc circuit breakers at a dc bus with n - 1 adjacent dc transmission lines. The system-level behavior of the proposed multiport hybrid dc circuit breaker is similar to other hybrid dc circuit breakers. The operation principles of the proposed multiport dc circuit breaker are introduced, analyzed, and compared to the existing solution in this work. The components ratings are compared to the existing solution, and the functionality of the proposed device is verified by simulation.