摘要
车载主断路器的频繁动作使得高压电缆及车体上浪涌电压的出现也愈加频繁,一方面导致高压套管及车载设备绝缘老化加快;另一方面,车体上浪涌电压将威胁列车的运行安全以及乘客的人身安全。本文建立牵引变电所-接触网-列车电路仿真分析模型,研究操作过电压的产生机理,分析过电压幅值范围、持续时间、传播规律等特性。结果表明:高速动车组主断路器动作时,高压电缆上将产生过电压,当接触网网压相位为90°、270°时,电缆上过电压幅值最大,最大过电压幅值达到82.6kV,车体上浪涌电压可达2.1kV。本文结论为列车操作过电压抑制措施的研究提供了理论基础。
The frequent action of vehicle-mounted main circuit breaker leads to the frequent overvoltage of high voltage cable and car body. The overvoltage will accelerate the aging of the insulation of high voltage bushing and on-board equipment and threaten the train’s safety running as well as the personal safety of passengers. In this paper, the traction substation-catenary-train circuit simulation model was established to study the genera-tion mechanism of the operation overvoltage, the range of amplitude, duration time and propagation rule of the operation overvoltage. The results show that the high surge overvoltage occurs in high voltage cable when the main vacuum circuit breaker of EMU operates. At 90°and 270〇of the voltage phase position of the catenary, the amplitude of surge overvoltage in the cable reaches 82. 6 kV. The surge overvoltage of the car body reaches 2. 1 kV. The results provide a theoretical basis for the study of train operation overvoltage suppression meas-ures.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2017年第10期62-67,共6页
Journal of the China Railway Society
基金
国家自然科学基金(U1234202)
青年科学基金(51107104)
