中文摘要：

针对电力机车通过锚段关节式电分相时,出现过电压引起变电所馈电线跳闸,车顶绝缘设备被击穿的现象,分析了机车过分相的暂态过程,建立了机车过分相时的等效高阶电路,使用龙格库塔法对机车过分相时中性段上的过电压进行求解。通过机车-牵引网-电分相联合仿真模型,对机车过分相时产生的过电压进行实验,并提出了利用RC滤波器抑制过电压的方法。实验结果表明：中性线加装RC滤波器可以使过电压降至68.10k V,从而降低了过电压对变电所和车顶绝缘设备的冲击,提高了机车运营的安全性。

英文摘要：

As the electric locomotive goes through the electrical sectioning overlap structure,the feed trip and the breakdown of roof insulation are caused by over-voltage,the transient process when the electric locomotive goes through the electrical sectioning is analyzed,and the equivalent higher-order circuit is established,the over- voltage on the neutral line is solved by using Runge-Kutta method. Based on the united model of locomotive-network- electrical sectioning,the over- voltage experiment when the electric locomotive goes through the electrical sectioning is conducted,and the method of using RC filter to suppress over- voltage is put forward. The experiment results show that the over- voltage decreases from 112. 8k V to 68. 10 k V when the neutral line is installed RC filter,the impact of overvoltage on the substation and the roof insulation equipment is reduced,as a result,the security of the locomotive operation is improved.