Cause of Traversing under Railway 220 kV Cable Explosion

Recently,the railway route length set another record high. Sometimes,the high-voltage cable has to be used to cross the railway. Due to the complicated structure and special application environment,it’ll cause great loss when explosion occurs to the high-voltage cable. Therefore,it’s necessary to analyze the failure reason of practical power cable. Based on the JMATI model in ATP-EMTP,the paper build the simulation model of 220 kV cables. The model can simulate the transient process of closing operation. The statistical switch is used to calculate the maximum overvoltage in this condition. The results show that the failure reason might be the defect of the cable joints’ process and installation. The modeling methods can provide reference for the similar power cable failure.