摘要
城市轨道交通普遍存在钢轨电位与杂散电流异常升高现象,已严重影响城轨供电安全.为阐明城轨钢轨电位与杂散电流动态分布规律,基于城轨供电系统结构建立供电系统动态潮流计算模型,分析多列车、多变电所并列运行下系统潮流动态变化,根据系统节点潮流参数建立钢轨电位与杂散电流的动态分布计算方法,基于列车牵引计算及系统实际参数仿真分析了多列车动态运行下系统钢轨电位、杂散电流分布规律.研究结果表明:列车运行功率重合度对钢轨电位与杂散电流有较大影响,当列车再生功率与牵引功率耦合较大时,回流安全参数会显著升高.为实际系统中钢轨电位及杂散电流控制提供支撑.
Abnormal rail potential and stray current exist widely in urban railway transit system, which has seriously affected the safety of urban rail power supply. In order to clarify the dynamic distribution of potential and stray current in urban railway transit, the calculation model of the dynamic power flow in DC traction power systems is established. The dynamic power flow are calculated with multiple trains running with multiple traction substations. The dynamic calculation method of rail potential and stray current are established based on the power flow. Then, the distribution of rail potential and stray current are analyzed based on the train traction calculation and the parameters in the railway lines. The results show that the coincidence degree of train operation power has a great influence on rail potential and stray current. When the coupling of trains’ regenerative power and traction power is large, the reflux safety parameters will increase significantly.It provides support for rail potential and stray current control in the actual system.
作者
楼锦君
张栋梁
LOU Jinjun;ZHANG Dongliang(Shaoxing Keqiao Rail Transit GroupCo.,Ltd.,Shaoxing Zhejiang 312030,China;School of Electrical and Power Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221008,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2020年第3期43-49,78,共8页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
江苏省产学研合作项目(BY2018072)。
关键词
城市轨道交通
钢轨电位
杂散电流
动态分布
urban rail transit
rail potential
stray current
dynamic distribution
