地铁区间过渡电阻测试仿真研究  

Simulation of Metro Transition Resistance Test

作　　者：朱峰[1] 于凯[1] 叶家全 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]中国民航局第二研究所,四川成都610041

出　　处：《计算机仿真》2015年第9期171-175,共5页Computer Simulation

摘　　要：地铁区间过渡电阻是影响杂散电流大小及分布的主要因素,由于回流轨对地电阻分布不均,所以对过渡电阻进行测试分析成为优化地铁排流系统、减小杂散电流危害的关键。由于地铁拓扑结构及影响因素的复杂性,使得过渡电阻的测试及分析非常困难。针对地铁拓扑结构及影响因素的复杂性问题,利用CDEGS仿真软件建立了精确的地铁隧道拓扑结构模型,并利用参数分析法对地铁区间过渡电阻进行了仿真,得到了过渡电阻与不同参数之间的关系曲线。仿真结果表明:轨道绝缘层和混凝土层电阻率是影响过渡电阻的主要因素且正常情况下过渡电阻主要由轨道绝缘层承担;结构钢筋网宽度及埋深对过渡电阻的影响较小。最后通过实验验证了仿真所得结果规律的正确性,证明上述仿真模型可为地铁区间过渡电阻进行可靠的仿真测试及分析提供了参考。Transition resistance is a major factor affecting metro stray current. The analysis and test of transition resistance are the key to to optimize the metro drainage system and reduce the stray current hazards. However the a- nalysis and test of transition resistance are very difficult because of the complex metro topologies and factors. For the Complexity, an accurate metro tunnel topology model was modeling with CDEGS software and transition resistance was measured by means of DC vohammetry. The relationship curves were obtained between transition resistance and differ- ent parameters. The research found that the resistivity of track insulating layer and concret are the main factors but the depth and width of steel mesh have little influence on transition resistance. Finally, a simple experiment was done to verify the correctness of the simulation. The simulation model can provide reliable simulation testing and the analysis of metro transition resistance.

关 键 词：地铁过渡电阻 仿真分析 参数分析 杂散电流 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] U228.1[自动化与计算机技术—计算机科学与技术]