摘要:研究目的:随着国内高速铁路和高压输电线路的快速建设，高压输电线跨越铁路接触网的现象越来越普 遍。然而，自我国高速铁路开通运营以来，曾发生多次因上跨输电线断线而导致接触网故障，严重影响高速铁 路运营安全，因此急需对接触网上跨输电线采取必要的防护措施展开研究。本文针对大风或覆冰等典型极限 工况，研究上跨输电线断线后的运动轨迹，为接触网防护结构大小设计提供依据。研究结论:（1)对于最大风条件下，输电线断线后，跨越高差14 m时最大横向漂移位移超过30 m; (2)对 于最大覆冰条件下，输电线断线后，跨越高差14 m时最大横向漂移位移不到3 m; (3)基于Recurdyn的动力学 仿真，为接触网故障仿真提供了新的有效技术手段；（4)该研究结论可用于确定接触网上跨输电线防护结构 纵向长度。

Abstract ： Research purposes ： With the rapid construction of high - speed railway and high voltage overhead transmission lines in China, the phenomenon of high voltage overhead transmission line across the railway catenary is becoming more and more common. However, since the high - speed railway went into operation, catenary failures have occurred several times due to the broken of overhead transmission line, seriously affecting the safe operation of high - speed railway, so it is necessary to research to take the necessary protective measures on the catenary in the area where overhead transmission lines crossing. According to the typical extreme working conditions such as wind or icing, this paper researches the trajectory of the broken transmission line, to provide the basis for the design of the protective structure of the catenary. Research conclusions:(1) The maximum lateral displacement of the broken transmission line is over 30 meters under the condition of maximum wind when the crossing elevation difference is 14 m; (2) The maximum lateral displacement is only up to 3 meters under the condition of maximum ice thickness, which is much smaller than that in the maximum wind case; (3 ) The dynamic simulation based on Recurdyn, provides a new effective technique for fault simulation of catenary; (4) The research conclusion can be used to determine the longitudinal length of the protective frame of overhead transmission line.