雷击接触网高速列车车体过电压分析  

Analysis of railcar's body over-voltage for electric multiple unit in the case of lightning catenary

作　　者：韩伟锋[1] 胡学永[2] 肖石[2] 吴广宁[1] 高国强[1] 刘东来[1] 杨坤松[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]南车青岛四方机车车辆股份有限公司技术中心,山东青岛266111

出　　处：《铁道科学与工程学报》2013年第4期117-123,共7页Journal of Railway Science and Engineering

基　　金：国家自然科学基金重点资助项目(U1134205);国家自然科学基金资助项目(51107104);国家"973"计划资助项目(2011CB711105)

摘　　要：我国高速铁路大都架设在空旷的野外和高架桥上,没有避雷线的防护,并且高速铁路线路分布地域广,接触网遭受雷击的概率较大。接触网段遭受雷击时将会引起列车车体过电压,危害车内信号监测与控制设备的安全。基于某型动车组的车体接地方式,阐述了雷击接触网时车体过电压产生的机理及入侵途径:一是雷电流通过避雷器注入车体时引起车体电势瞬时抬升,二是接触网中的雷电流在车体-钢轨回路中产生感应电势。通过理论分析和软件仿真,得出在典型雷电波击中接触网时,车体瞬时电势幅值,并提出了降低车体过电压的措施。Catenary lines suffer a direct lightning strike with great probability for following reasons： being set in the open field and viaduct ; without protection of lightning lines along the railway lines and wide geographic distri bution of HSR line. Overvoltage might be caused at railcar＇ s body when the segment of train traveling catenary is struck by lightning, which is hazardous to the safety of signal monitoring and control equipment, Based on the arrester, which gave rise to the body potential instantaneously. Another way is righting current that in catenary induced potential in body rail circuit. The amplitude of body＇ s transient potential was received under the strike of typical lighting in catenary through theoretical analysis and numerical simulation, and kinds of measures were proposed to decrease the body over voltage.

关 键 词：高速铁路 接地 过电压 

分 类 号：U264.7[机械工程—车辆工程]