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城市轨道交通普遍采用直流牵引供电方式,随着运营时间的增加及外部环境的影响,轨道对地的绝缘保护就会出现绝缘老化现象,更加严重的会出现绝缘破损,这会造成地铁回流系统的杂散电流与轨电位偏离正常值。文章通过建立直流牵引回流系统离散模型,通过MATLAB/Simulink仿真分析了绝缘损坏位置及绝缘损坏电阻对全线钢轨电位分布的影响。
Urban rail transit commonly used DC traction power supply, with the increase of operating time and the impact of the external environment, rail insulation on the ground there will be insulation aging phenomenon, there will be more serious insulation damage, which will cause the subway reflux system Stray current and rail potential deviation from normal. The article establishes the discrete model of DC traction return system and analyzes the influence of insulation damage location and insulation damage resistance on the whole rail potential distribution by MATLAB / Simulink simulation.