摘要
在直流牵引供电系统中,杂散电流将直接影响地铁中电气设备、设施的正常运营,因此研究杂散电流分布特性情况对减小杂散电流泄露、保证运营安全有重要作用。本文将地铁车辆牵引特性引入直流牵引系统,建立了地铁杂散电流和地铁车辆运行特性之间的动态分布模型,分析在牵引特征下杂散电流的分布情况,并且考虑牵引路径中坡度、隧道长度、曲线半径等相关阻力对杂散电流和轨道电压分布的影响。模型结果表明,地铁车辆牵引特性及牵引路径等相关因素对杂散电流的影响值得关注,相关结论将有利于指导地铁内杂散电流的防护工作。
In the DC traction power supply system,the hazards of stray current will directly affect the normal operation of the electrical equipment,facilities in the subway. In order to ensure the safety of operation,the study of stray current analysis characteristics of the situation plays an important role to reduce stray current leakage. In this paper,the traction characteristics of the rail vehicle are imported into the DC traction system,and the dynamic distribution model between the stray current and the running characteristics of the rail vehicle is established. The distribution of stray current under acceleration and braking traction is analyzed,and the influence of the slope,length of the tunnel and curve radius on the distribution of stray current and orbital voltage is considered. The results show that the traction characteristics of traction path and other related factors have significant effect on the stray current,and the relevant results will be beneficial to further guide the works of the stray current protection.
作者
蔡智超
程浩
林知明
CAI Zhi-chao;CHENG Hao;LIN Zhi-ming(School of Electrical and Automation Engineering,East China Jiaotong University,Nanchang 330013,China)
出处
《电工电能新技术》
CSCD
北大核心
2018年第8期82-88,共7页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(51565012)
江西省青年科学基金项目(20171BAB216035)
关键词
杂散电流
城市轨道交通
牵引特性
stray current
urban rail transit
traction characteristics
