为了保障人身安全，通常会在运营线路的车站和段场中安装钢轨电位限制装置(Over-Voltage Protection Device，OVPD)，但当钢轨电位限制装置OVPD复归时产生的操作过电压可能会导致OVPD Ⅱ段动作，甚至闭锁，导致钢轨电位限制装置将大地和钢轨短接，成为杂散电流泄漏的通路。随着城市轨道运营里程的不断增加，杂散电流造成的周边电力系统直流偏磁、城市管网腐蚀损坏等问题十分严重，已经严重威胁到电力系统和油气系统的安全运行。针对异常钢轨电位引发钢轨电位限制装置误动作导致城市轨道交通杂散电流泄漏加剧的问题，本文提出一种城市轨道交通钢轨电位限制装置操作过电压的抑制方法，通过搭建钢轨电位限制装置OVPD分闸产生操作过电压的仿真模型、利用N1250接触器搭建电弧实验平台和实际线路的挂网测试。结果表明，采用本文所提的钢轨电位限制装置操作过电压抑制方法后，钢轨电位限制装置分闸产生的操作过电压峰值将显著降低，降低了OVPD误动作的可能性，减小了杂散电流泄漏。

In order to ensure personal safety, over voltage protection devices are usually installed in stations and depots of operating lines, OVPD)， However, the overvoltage generated during the reset of the rail potential limiting device OVPD may cause the OVPD section II to act or even lock, resulting in the rail potential limiting device short circuiting the ground and rail, becoming a path for stray current leakage. With the continuous increase of urban rail operation mileage, stray currents have caused serious problems such as DC bias in the surrounding power system and corrosion damage to the urban pipeline network, which have seriously threatened the safe operation of the power system and oil and gas system. This paper proposes a suppression method for the overvoltage caused by the mis-operation of the rail potential limiting device caused by abnormal rail potential, which exacerbates the leakage of stray currents in urban rail transit. The method involves constructing a simulation model of the overvoltage generated by the OVPD opening of the rail potential limiting device, constructing an arc experimental platform using N1250 contactors, and conducting grid mounted testing on actual lines. The results show that after using the overvoltage suppression method proposed in this article, the peak operating overvoltage generated by the opening of the rail potential limiting device will be significantly reduced, reducing the possibility of OVPD mis-operation and reducing stray current leakage.