摘要
杂散电流是影响城市轨道交通供电系统运行可靠性的重要隐患.在考虑列车运行中所受附加阻力的条件下,以“钢轨-排流网-大地”模型为研究对象,建立杂散电流动态分布模型并对其动态分布特性进行了仿真分析.研究结果表明:杂散电流峰值主要出现在列车启、制动阶段,制动阶段峰值更大;相较于快速牵引工况和舒适牵引工况,经济牵引工况下产生的杂散电流最小.考虑多种附加阻力后,经济牵引工况下启动阶段杂散电流增加14.65%,制动阶段杂散电流降低6.45%;快速牵引工况下启动阶段杂散电流增大7.09%,制动阶段几乎不变;舒适牵引工况下杂散电流几乎不受影响.研究成果为城市轨道交通杂散电流排流装置的设计与防护提供了理论参考.
Stray current is an important hidden danger that affects the operational reliability of urban rail transit power supply system.In this paper,a dynamic stray current distribution model is established and its dynamic distribution characteristic is simulated by taking the rail-drainage net-ground model as the research object under the condition of considering the additional resistance of train operation.The research results show that the peak value of stray current mainly appears in the train starting and braking stage,and the peak value is larger in the braking stage.Compared with the fast traction condition and the comfortable traction condition,the stray current generated in the economic traction condition is the smallest.After considering the multiple additional resistance,the stray current increases by 14.65%at the starting stage of economic traction condition and increases by 7.09%at the starting stage of fast traction condition,and it is almost unchanged in the braking stage of fast traction condition and the comfortable traction condition.At the same time,the stray current decreases by 6.45%at the braking stage of economic traction condition.Related conclusions provide more accurate references for the design and protection of stray current drainage devices for urban rail transit.
作者
康宏
李亚宁
王烨
KANG Hong;LI Yaning;WANG Ye(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2022年第5期167-174,共8页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金(51476073,51266004)。
关键词
城市轨道交通
直流牵引供电系统
杂散电流
多附加阻力
动态特性
urban rail transit
DC traction power supply system
stray current
multiple additional re‐:sistance
dynamic characteristic
