Hybrid circuit breakers (HCBs) play a vital role in developing multi-terminal HVDC (MT-HVDC) systems, owing to their favorable features of fast fault current isolation and low on-state losses. In HCBs, the way of commutation of the fault current and the configuration of the main breaker branch have a significant impact on the performance of interruption. This paper proposes a new bidirectional HCB based on a coupled inductor that realizes robust interruption capability. In the proposed topology, a bridge-type breaker branch is utilized to realize the bidirectional breaking. By using insulated-gate bipolar transistor (IGBT) in combination with coupled-inductor-based circuit in the main breaker branch, the short-circuit fault is isolated. To validate the effectiveness of the proposed HVDC circuit breaker, simulations are performed using Matlab/Simulink.

混合断路器（HCB）由于其快速故障电流隔离和低通态损耗的有利特性，在开发多端高压直流输电（MT-HVDC）系统中发挥着至关重要的作用。在HCB中，故障电流的换流方式和主断路器支路的配置对中断性能有显着影响。本文提出了一种基于耦合电感器的新型双向 HCB，可实现鲁棒的中断能力。在所提出的拓扑中，利用桥式断路器支路来实现双向分断。通过在主断路器支路中使用绝缘栅双极晶体管（IGBT）与基于耦合电感的电路相结合，可以隔离短路故障。为了验证所提出的 HVDC 断路器的有效性，使用 Matlab/Simulink 进行了仿真。