A Novel Solid-State Switch Scheme With High Voltage Utilization Efficiency by Using Modular Gapped MOV for DC Breakers

Metal oxide varistors (MOV) is often used to limit the overvoltage generated by the current breaking of dc breaker to protect power electronic device from breakdown. However, while suppressing overvoltage, the MOV also causes the degradation of continuous operating voltage capability. This letter proposes a novel solid-state switch scheme with high voltage utilization efficiency by using modular g...