Stray Current Leakage Control for Urban Rail Transit Based on Rail Composite Insulation Technology

Aiming at the problem of stray current generated from the track to the ground under the action of subway running and traction return current, an insulation technology was proposed to improve the insulation performance of the track to the ground and soreduce the distribution of stray current. The reliability and stability of the technology were verified by laboratory test and simulation. The results showed that the track composite insulation technology could significantly reduce the negative impact of the reduction of the resistance of the fastener structure and the surface resistance on the insulation performance of the track structure, and effectively improve the insulation performance of the track to the ground.