Research on circuit-breaker closing surge overvoltage of dual-system train
LI Xuefei1, SUN Wenbin1, LI Mingze2, MA Qing'an3, DAI Jun3
1. CRRC Changchun Railway Vehicle Co., Ltd, Changchun 130062; 2. School of Automation and Information Engineering, Sichuan University of Science & Engineering, Yibin, Sichuan 644000; 3. School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611730
Abstract：When a dual-system train passes through the neutral-section, the catenary voltage is coupled to the vehicle body through the high voltage cable distribution capacitance, resulting in a surge overvoltage in the vehicle body, which may seriously threaten the safe operation of the on-board electronic equipment. In this paper, the generation mechanism of the circuit-breaker closing overvoltage of the dual-system train is analyzed. In order to avoid the solution of higher-order differential equations, the overvoltage is decomposed into two oscillation modes. A Simulink model is built to analyze the closing transient process of the dual-system train. On-site measurement of surge overvoltage is also conducted. The theoretical and on-site measurement results are consistent. Studies show that a surge overvoltage of up to 2 000V on the vehicle body maybe be generated and it will decays to zero within about 5 microseconds. The error rates of the calculation model, simulation model, and measured data are 17% and 0.15%, respectively. Therefore, the model proposed in this paper has high feasibility.
李雪飞, 孙文斌, 李明泽, 马庆安, 代骏. 双制式列车断路器合闸浪涌过电压研究[J]. 电气技术, 2023, 24(9): 28-33.
LI Xuefei, SUN Wenbin, LI Mingze, MA Qing'an, DAI Jun. Research on circuit-breaker closing surge overvoltage of dual-system train. Electrical Engineering, 2023, 24(9): 28-33.
2023, Vol. 24 
