动车组高压系统过电压及其抑制技术研究

Study on overvoltage and its suppression technology for the high-voltage system of MU

对高速动车组在过分相、升降弓、弓网离线等情况下引起高压系统过电压的机理进行了分析,重点剖析过电压的影响因素,提出了动车组抑制过电压的2种措施。得出并联RC滤波器可从根本上减少过电压的结论,静态测试和动态测试表明动车组增加保护接地数量可以抑制车体过电压的峰值。

This paper analyzes the mechanism of overvoltage in the high-voltage system under the conditions of passing over phase-splitter, lifting and descending pantograph and pantograph-catenary disconnection, focusing on the influence factors of overvoltage,and puts forward two measures to suppress overvoltage. It is concluded that parallel connecting RC filter can fundamentally reduce overvoltage. Static and dynamic tests show that increasing the number of protective groundings can suppress the peak of overvoltage of the car body.