The Analysis of Grounding Current of Modern High-Speed Trains

The grounding current of the train is an important reason for the electrical corrosion of the carbon brushes and axles of the train wheels. The distribution and variation of train grounding current are closely related to the train integrated grounding system. The integrated grounding system of high-speed train includes two subsystems: on-board mobile grounding subsystem and traction network fixed grounding subsystem. AT power supply mode has many technical advantages, such as long power supply distance and strong power transmission capacity, etc., so it has become the main power supply solution for traction power supply of modern high-speed railways. The traction network fixed grounding subsystem under the AT power supply mode is very different from other traction power supply schemes. Therefore, in view of the grounding current problem of modern high-speed trains, this paper establishes a simulation model of the integrated grounding system of high-speed trains under the AT power supply mode, and analyzes the distribution and variation of grounding currents of modern high-speed trains.