城市轨道交通轨排过渡电阻新型测量方法
李诗晨1禹贤虎2李景龙2
New Measurement Methods for Transition Resistance of Rail Tracks in Urban Rail Transit
LI Shichen1YU Xianhu2LI Jinglong2
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作者信息:1.上海申通地铁集团有限公司， 201103， 上海
2.上海电力大学电气工程学院， 200090， 上海
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Affiliation:1.Shanghai Shentong Metro Co., Ltd., 201103, Shanghai, China
2.School of Electrical Engineering, Shanghai University of Electric Power, 200090, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.05.039
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中图分类号/CLCN:U239.5;U223
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栏目/Col:供电与能源
摘要:
［目的］为了分析在地铁运行过程中，杂散电流对埋地管道和电气设备的影响，有必要研究城市轨道交通轨排过渡电阻新型测量方法。［方法］介绍了轨排过渡电阻测量原理。针对轨排过渡电阻测量问题，提出一种利用冲击电流源的新型测量方法。基于地铁隧道建设特点及冲击电流在轨排结构上的传播特性，对轨排过渡电阻进行仿真建模。结合仿真模型计算轨排过渡电阻值，并以上海轨道交通某线路为例，通过现场测量试验，分析对比传统直流法与冲击电流法的测量结果。［结果及结论］随着轨排过渡电阻的增大，采用冲击电流法的测量误差逐渐减小，并保持在5%以内。冲击电流法对现场环境和测量对象要求较低、外部接线较简单、可操作性高、抗干扰能力强。经过多次现场测量计算，基于冲击电流法测量的轨排过渡电阻误差约为1.3%。
Abstracts:
［Objective］To analyze the impact of stray currents on buried pipelines and electrical equipment during metro operation, it is necessary to study new measurement methods for the transition resistance of rail tracks in urban rail transit. ［Method］The principle of measuring rail track transition resistance is introduced. To address the challenges in measuring rail track transition resistance, a novel measurement method utilizing an impulse current source is proposed. Based on the characteristics of metro tunnel construction and the propagation behavior of impulse current in rail track structures, a simulation model for rail track transition resistance is developed. The transition resistance values are calculated using the simulation model, and on-site measurement tests are conducted as a case study on a Shanghai urban rail transit line. The measurement results by the traditional DC method and the impulse current method are analyzed and compared. ［Result & Conclusion］As the rail track transition resistance increases, the measurement error of the impulse current method gradually decreases and remains within 5%. The impulse current method features lower requirements for on-site conditions and measurement objects, simpler external wiring, higher operability, and stronger anti-interference capabilities. Through multiple on-site measurements, the error of the rail track transition resistance measured by the impulse current method is approximately 1.3%.
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