独立四轨回流系统对埋地管道直流干扰测试

DC Interference Test on Buried Pipeline by Independent Four-rail Return System

独立四轨回流系统作为一种城市轨道交通牵引供电回流方式,可大幅增加回流轨过渡电阻,减小杂散电流。为研究采用独立四轨回流系统的城市轨道交通杂散电流对周边埋地燃气管道的影响,对郑许线开通前后周边管地电位和地电位梯度进行测试。结果表明,郑许线周边管地电位和地电位梯度在线路开通前后变化不大。

As an independent four-rail return system for urban rail transit traction power supply,it can significantly increase the transition resistance of the return rail and reduce stray currents.To study the impact of stray currents in urban rail transit using an independent four-rail return system on surrounding buried gas pipelines,the ground potential and ground potential gradient of the surrounding pipelines are tested before and after the putting into operation of the ZHENGXU line.The results indicate that the ground potential and ground potential gradient around the ZHENGXU line do not change significantly before and after the line is put into operation.