Hybrid DC circuit breaker with current self-transfer function and control method thereof

• Main Authors: ZUO KUN, XU DAN, XUE JUN, HAN YANHUA, WU JINGFENG, FENG NANZHAN, YANG DINGGE, LI WENHUI, LI LIANGSHU, GU YONGGANG, ZHANG XIAOLAN, DING BIN, YUAN FUXIANG, WANG CHENXI, WU YIFEI, WANG SEN, GAO JIAN, LIU ZIRUI, GUO CAN, LI XIN, WAN KANGHONG, NIU BO, YANG FEI, WANG HONGYOU, SHI YIQING, WU ZIHAO, LI PENGCHENG, CHENG LIN
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2021
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention discloses a hybrid DC circuit breaker with a current self-transfer function and a control method thereof. The hybrid DC circuit breaker comprises a main current loop, a solid-state switch branch and an energy dissipation branch which are connected in parallel. The main current loop comprises a high-speed mechanical switch and a liquid metal unit which are connected in series; the solid-state switch branch comprises a solid-state switch assembly or a plurality of solid-state switch assemblies which are connected in series, each solid-state switch assembly comprises two fully-controlled power semiconductor devices which are reversely connected in series, and the two ends of each fully-controlled power semiconductor device are reversely connected with diodes in parallel; the two ends of each full-control power semiconductor device are connected with a first branch in parallel, and the first branch comprises a capacitor and a resistor which are connected in series; and the energy dissipation branch