Research on stray current distribution of metro based on numerical simulation

Subway stray current is very harmful to buried pipeline, but it is very difficult to measure stray current actually. The analysis result can't reflect the actual situation well. Therefore, it is necessary to simulate it with numerical simulation software. Based on the formation mechanism and harm of stray current in urban rail transit, CDEGS software was used to build the traction power supply model of rail transit. The distribution of stray current in subway was introduced in detail. The simulation results show that the distribution of stray current in subway is different under different power supply modes. The stray current of unilateral power supply is larger than the stray current under bilateral power supply, and the corrosion of the pipeline is more serious. The closer the drainage net is to the running track, the stronger the drainage capacity of the drainage net is and the smaller the corrosion of the pipeline is.