中文摘要：

研究目的：针对电力机车断电过电分相产生过电压击穿绝缘设备问题，进行时序开关控制的链式电路建模，分类比较七跨／八跨锚段关节式电分相单、双中性段的机车一电分相一牵引网联合仿真全过程过电压，提出一种抑制锚段关节式电分相过电压治理的方法。研究结论：（1）七跨电分相中性线得到的过电压与文献中的试验结果相符，残压联合仿真有效值与理论计算值约11kV，进一步对仿真有效性进行了验证；（2）八跨双中性段电分相的双边无源RC抑制电路，使中性段过电压值由七跨单中性段的95．57kV降为59．28kV，抑制效果较明显；（3）实验结果对锚段关节电分相设计具有重要参考价值。

英文摘要：

Research purposes： In order to research over - voltage produced by electric locomotive power outage over split - phase which makes equipment insulation breakdown, chain - type equivalent circuit model of timing switch control is established. The new suppression method which suppress the over - voltage is proposed compared with the over - voltage produced by joint simulation model in the single and double neutral section of seven / eight span overlapping electrical sectioning device in electric locomotive - electrical sectioning- traction network. Research conclusions： （ 1 ） The over - voltage of seven - span overlapping electrical sectioning device is consistent with the test results of literature, and the residual pressure co -simulation and the theoretical value are about 11 kV, which further prove the effectiveness of the simulation. （2） The maximum overvoltage decreases from 95.57 kV in the single neutral section of the seven - span overlapping electrical sectioning device to 59.28 kV in the bilateral neutral passive RC circuit of the eight - span overlapping electrical sectioning device, which suppressive effect is obvious. （3） Experimental results have the important reference value for anchor section joint electrical phase design.