高速铁路对邻近普速铁路电力电缆的干扰机理

高速铁路由于列车速度快、牵引功率大,且高速运行时持续取流,对与其邻近的普速铁路沿线敷设的电力电缆产生了明显的电磁干扰.为此,通过对感性耦合和阻性耦合机理分析,研究高速铁路对电力电缆感应电压的干扰机理;运用CDEGS软件建立高速铁路对电力电缆电磁干扰仿真模型,总结电力电缆感应电压影响因素;基于计算结果对仿真模型进行验证....

Mechanism of High-Speed Railway Interference on Power Cables of Adjacent Normal-Speed Railway

Due to high speed, large traction power and continuously receiving current in operation, high-speed railways generate obvious electromagnetic interference on the power cables of adjacent normal-speed railways. Based on the analysis of inductive coupling and resistive coupling mechanism, the interference from high-speed railways on the induced voltage of power cables was analyzed, and CDEGS software was used to establish the electromagnetic simulation model of high-speed railway interference to the power cables of adjacent normal-speed railways, and the factors affecting the induced voltage of power cables are summarized. The simulation model was verified on the basis of the calculation results. The results show that the induced voltage of power cables near high-speed railways is related to the traction load, parameters of power cable and soil structure. Of them, the parallel length, load current, soil resistivity and short-circuit current have significant influence on the induced voltage of power cables. The protection distance between high-speed railways and normal-speed railways should be set according to different cable lengths. Middle grounding and single-terminal grounding can effectively reduce the induced current of power cables.