Abstract：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.
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