高速动车组雷电波侵入特性及传播规律研究  

Study on Intrusion and Propagation Characteristics of Lightning Overvoltage in High-speed Electric Multiple Unit

作　　者：曹保江[1] 宋勇葆 魏文赋[1] 高国强[1] 吴广宁[1] CAO Baojiang;SONG Yongbao;WEI Wenfu;GAO Guoqiang;WU Guangning(School of Electric Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院

出　　处：《铁道学报》2019年第12期26-33,共8页Journal of the China Railway Society

基　　金：国家自然科学基金(U1234202,51577158,51325704)

摘　　要：高速铁路接触网多架设在高架桥上,受雷击概率较高,动车组将会受到接触网雷击过电压的威胁,因此需探讨雷击接触网时沿接触线入侵至动车组高压系统的雷电过电压特性。通过建立牵引网-动车组整体仿真模型,研究雷击接触网时传播至动车组高压系统雷电波波形特征与车载变压器雷电过电压范围,探究雷击点位置对雷电波传播过程的影响。结果表明:雷击承力索/接触线时,动车组雷电侵入波波前时间在10~20μs,波尾时间在30~50μs;随着雷击点和动车组距离的增加,雷电波幅值逐渐降低,波前时间逐渐增加,波尾时间逐渐减小;车载变压器雷电过电压与避雷器保护水平的比值不大于1.34。雷击馈线时,接触线感应电压波尾时间小于标准雷电冲击波尾时间;车载变压器雷电过电压波形近似为平顶波,波前时间大于标准雷电冲击波前时间,波尾时间小于接触线感应电压波尾时间。The erection of most catenary system of high-speed railway on viaducts causes high probability of lightning strike,which subjects the EMU(Electric Multiple Unit)to lightning overvoltage.It is necessary to study the lightning surge characteristics in high voltage system of of EMU when lightning strikes the catenary.In this paper,the lightning overvoltage calculation model of the traction network-EMU was built to analyze the lightning wave waveform characteristics and the range of on-board transformers lightning overvoltage when lightning struck the catenary,and explore the influence of lightning point on the propagation of lightning impulse.The results show that when lightning strikes the contact line/messenger wire,the front time of lightning intruding waves is about 10-20μs,while the tail time is 30-50μs.With the increase of the distance between the lightning point and EMU,the amplitude of the lightning wave is gradually reduced,when the wavefront time is gradually increased,and the tail time decreases gradually.The ratio between on-board transformer lightning overvoltage and the protective level of arrester is no greater than 1.34.When lightning strikes the feeder,the tail time of the induced voltage of the contact line is shorter than that of the standard lightning impulse waveform.The lightning overvoltage applied to on-board transformer is approximately to be a flat-top wave.Its front time is longer than that of the standard lightning impulse waveform and its tail time is shorter than that of contact line induced voltage.

关 键 词：动车组 牵引网 氧化锌避雷器 车载变压器 波形特征 雷击过电压 

分 类 号：U229[交通运输工程—道路与铁道工程]