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Study on operation voltage monitoring and electrothermal coupling simulation of electric multiple unit (EMU) roof arrester
High Voltage ( IF 4.4 ) Pub Date : 2022-03-04 , DOI: 10.1049/hve2.12196
Qizhe Zhang 1 , Shenghui Wang 1 , Kaixuan Sun 1 , Xinghao Dong 2 , Mingliang Liu 1 , Fangcheng Lü 1
Affiliation  

The roof arrester of electric multiple units (EMU) can efficiently limit the overvoltage, and ensure the safe operation of the EMU electrical equipment. In the process of high-speed operation, the traction power supply system is often affected by overvoltage. In addition, roof arrester explosion accidents occasionally occur. In this paper, the on-line voltage measurement system of the EMU arrester is developed. By analysing a large number of voltage waveforms, the abnormal voltage is divided into three categories: over-phase voltage, high harmonic voltage and steep impulse overvoltage. The characteristics of abnormal voltage waveforms are then summarised. The electrothermal coupling simulation model of the arrester is developed, and the current response and temperature distribution of the arrester under abnormal voltage are calculated. The impact of the impulse voltage energy on the arrester temperature is studied by applying a triangular wave voltage to the model. Finally, some suggestions are proposed for the operation and maintenance of the roof arrester.

中文翻译:

动车组车顶避雷器运行电压监测及电热耦合仿真研究

动车组车顶避雷器能有效限制过电压,保证动车组电气设备的安全运行。在高速运行过程中,牵引供电系统经常受到过电压的影响。此外,屋顶避雷器爆炸事故时有发生。本文研制了动车组避雷器在线电压测量系统。通过对大量电压波形的分析,将异常电压分为三类:过相电压、高次谐波电压和陡脉冲过电压。然后总结异常电压波形的特征。建立了避雷器的电热耦合仿真模型,计算了避雷器在异常电压下的电流响应和温度分布。通过对模型施加三角波电压,研究了冲击电压能量对避雷器温度的影响。最后,对屋顶避雷器的操作和维护提出几点建议。
更新日期:2022-03-04
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