Simulation Research on Breaking Performance of 550kV 80kA SF6 Circuit Breaker under Different Opening Characteristics - Tan, Shengwu; Zhang, Hao; Li, Miaoxin; Duan, Xiaohui; Wang, Zhijun; Zhang, Bo (2021 11th International Conference on Power and Energy Systems (ICPES), Power and Energy Systems (ICPES), 2021 11th International Conference on, 2021)