动车组自动断电过分相车体瞬态过电压优化研究  

Study on the EMU Body Overvoltage of Automatic Power Failure Passing Neural Section Device

作　　者：田志强 陈祖祥 袁庚 张梦楠 赵雪冬 刘凯[1] TIAN Zhiqiang;CHEN Zuxiang;YUAN Geng;ZHANG Mengnan;ZHAO Xuedong;LIU Kai(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电工技术》2021年第20期5-8,共4页Electric Engineering

摘　　要：高速动车组车载自动断电过分相时,瞬态电压会通过车顶高压电缆缆芯与屏蔽层间的耦合注入各节车体,合理的保护接地方式可快速泄放车体瞬态电压,保证各车体电位相等。基于此,介绍了动车组过分相的暂态过程,运用MATLAB/Simulink建立了各暂态过程的等效电路模型,经过仿真分析接地电感与电容对车体瞬态电压的影响规律,提出了并联电容器的保护接地方案,对动车组高效运行具有一定参考价值与指导意义。When a high-speed electric multiple unit(EMU)is passing neural section device,the transient overvoltage will be injected into each section of the car body through the coupling between the roof high-voltage cable core and the shield.A reasonable method of grounding system can effectively discharge the overvoltage and ensure the isoelectric potential of each car body.Based on this,the transient processes of EMU passing neural section are introduced and the equivalent circuit model of each transient process during the process is built by using MATLAB/Simulink.Then,the influence of grounding inductance and capacitance on the EMU body overvoltage is analyzed through simulation,and a grounding scheme with parallel capacitors is proposed,which has some guiding significance for the efficient operation of EMU.

关 键 词：动车组 车载自动断电过分相 车体过电压 接地技术 电容 

分 类 号：U221[交通运输工程—道路与铁道工程]