Study on operation voltage monitoring and electrothermal coupling simulation of electric multiple unit(EMU)roof arrester  

作　　者：Qizhe Zhang Shenghui Wang Kaixuan Sun Xinghao Dong Mingliang Liu Fangcheng Lü 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing,China [2]Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding,China

出　　处：《High Voltage》2022年第2期357-368,共12页高电压（英文）

摘　　要：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 charac-teristics 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.

关 键 词：operation TRACTION COUPLING 

分 类 号：TM862[电气工程—高电压与绝缘技术]