摘要
直流牵引供电系统普遍存在钢轨电位过高的问题,现有模型仿真结果一般远小于现场实际值。对多区间多列车并列运行情况下电流跨区间传输现象进行分析,理论研究了电流跨区间传输对钢轨电位的影响。通过广州地铁8号线现场测试,验证了跨区间传输电流所占列车总牵引电流比例增加时,会导致钢轨电位增大。根据直流牵引供电系统实际特性,建立多供电区间多列车的钢轨电位动态分析模型,仿真分析了列车动态运行下直流牵引供电系统电流跨区间传输现象,对比分析不同电流跨区间传输情况下钢轨电位变化。现场测试及仿真结果表明,有效避免电流跨区间传输可大大降低线路钢轨电位幅值。
A high rail potential has been observed during operation of the DC mass transit systems,while many simulation results of the rail potential are generally much smaller than the actual value. The traction current transmission among power sections when multiple trains run in multiple sections and its effect on the rail potential have been analyzed in this paper. The fieldtest results of the Guangzhou Metro Line 8 show that the rail potential is higher when a larger proportion of the current transmission appears. A dynamic analysis modelfor the rail potential when multiple trains running in multiple power sections isproposed in this paper. The phenomenon of the current transmission during trains ＇ running is simulated by the dynamic analysis model,and rail potential changing under differentproportions of the current transmission is analyzed. The results of the fieldtests and the simulations show that the rail potential can be greatly reduced by preventing the cross-transmission of the traction current.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第11期129-139,共11页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51147011)
江苏省自然科学基金(BK20130187)
江苏省普通高校研究生科研创新计划项目(KYLX_1383)资助
