针对地铁走行兼牵引回流作用的轨道对地形成杂散电流的问题,提出了一种提升轨道对地绝缘性能以降低杂散电流分布的绝缘技术。通过实验室试验和仿真手段检验了该技术的可靠性和稳定性。结果表明:轨道复合绝缘技术可明显减轻扣件结构体电阻及表面电阻降低对轨道结构绝缘性能的负面影响,有效提升轨道对地绝缘性能。

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.