测试科学与仪器2022，Vol.13Issue(3)：261-266,6.DOI:10.3969/j.issn.1674-8042.2022.03.002
土壤电阻率对城市轨道交通供电系统杂散电流的影响
Influence of soil resistivity on stray current in power supply system of urban rail transit
摘要
Abstract
In order to explore the influence of soil resistivity on stray current in power supply system of urban rail transit,we establish an equivalent circuit model of the rail-to-ground structure based on resistance network method first.After measuring the soil resistivity of a real subway system,a simulation model is established in Matlab to obtain the stray currents at different soil resistivities.Then the influence of soil resistivity on stray current is analyzed.Afterwards,to verify the rationality and reliability of the simulation model,we design a test circuit to measure the stray current and rail-to-ground voltage in a real subway system,and a comparison of the experimentally measured results and simulation results is presented.The results show that the stray current is the maximum when the soil resistivity is 211.57 Ω·m;when the soil resistivity is 768.47 Ω·m,the stray current is the minimum,that is,the smaller the soil resistivity,the greater the stray current.Therefore,the resistivity should be increased as much as possible when ramming the track foundation in urban rail transit system.关键词
城市轨道交通/供电系统/杂散电流/土壤电阻率/四极法Key words
urban rail transit/power supply system/stray current/soil resistivity/four-electrode method引用本文复制引用
陈旺龙,李亚宁,王烨..土壤电阻率对城市轨道交通供电系统杂散电流的影响[J].测试科学与仪器,2022,13(3):261-266,6.基金项目
National Natural Science Foundation of China(Nos.51476073,51266004) （Nos.51476073,51266004）
Natural Science Foundation of Gansu Province(No.1308RJZA199) （No.1308RJZA199）
