单向导通装置对杂散电流的影响分析

Analysis of Stray Current under the Influence of Unidirectional Conduction Device

在地铁运行过程中,杂散电流对钢轨和附近管道的影响很大,尤其是在车辆段、隧道等特殊区域,单向导通装置可以有效减少这些区域的杂散电流。介绍杂散电流和单向导通装置,分析单向导通装置的安装原理,将数据记录仪一端接钢轨,另一端接大地,测试绝缘节附近的轨地电压,采集单向导通装置电流并对采集数据进行分析,发现在车辆段不管是否有车通过都有杂散电流和钢轨电位的存在,这种现象表明在地铁运行中要注意这部分杂散电流和钢轨电位,避开危险电流、高钢轨电压,注意人身安全。

During the operation of the subway, the stray current has great influence on the rail and the nearby pipe, especially in some special area, such as the metro depot, tunnel section and so on. Using the unidirectional conduction device can reduce stray current in these special areas.The stray current and the unidirectional conduction devices are introduced and the installation principle of the unidirectional conduction device is analyzed. The rails are connected and the tester is put between the rail and the earth to measure the voltage of the derailment and the current of the unidirectional conduction device; after analyzing the collected data, it is found that the stray current and rail potential in Metro depot always existed no matter whether there is a vehicle or not. In view of this phenomenon, we should pay attention to the stray current and the rail potential, try to avoid dangerous voltage and high current rail, and take care of personal safety.