关键词: 牵引回流, 轨道绝缘, 烧损, 饱和电抗器, 扼流变

Abstract: Starting with the general situation, cause and rectification scheme of several typical cases of track insulation burning, this paper analyzes the reasons for poor traction return flow, and puts forward some measures to improve the design of traction return cut-off point, add empty choke, and strengthen the reflux cable to construct the traction backflow, so as to solve the problem of burning insulation caused by high current. At the same time, combined with the actual scene, the optimization and rectification of traction return in the design, construction and operation are put forward, ahead of the prevention, which has great reference significance and long-term impact

Key words: traction reflux, track insulation, burn loss, saturation resistor, choke