复线电气化铁路带回流线直供方式接触网防雷分析

Analysis of Lightning Protection for Direct Supply with Return Line Catenary on Double Track Electrified Railway

接触网由于其本身的结构和位置而处于牵引供电系统中极其薄弱的环节,容易遭受雷击,导致设备的损坏,影响铁路的安全运行。本文采用PSCAD电磁暂态仿真软件,建立了接触网雷击研究仿真模型,分析了雷电感应、反击、绕击导致的绝缘子闪络情况下的雷击跳闸率,并对海南西环线接触网雷击跳闸率进行了评估计算,就雷暴日参数以及回流线升高对雷击跳闸率的影响和积极作用进行了分析,论证了带回流线直接供电方式回流线升高和避雷线对接触网防雷的积极防护效果,对于电气化铁路接触网的防雷设计具有参考意义。

Catenary becomes the weak link in traction power supply system because of its structure and position, theequipment is easier to be damaged by lightning strikes to affect the safety of railway. Based on the PSCADelectromagnetic transient simulation software, the simulation model of catenary lightning research, analyses on thelightning trip-out rate caused by lightning induction, fight back and around the strike under the circumstance of insulatorflashover, the catenary lightning trip-out rate of Hainan West Ring Railway is evaluated, the Impact and positive role ofthunderstorm day parameters and return line rises on lightning trip-out rate is analyzed, s the active protection effect ofrise of the direct power supply with return line on catenary protection is demonstrated, it has reference significance forthe lightning protection design of electrified railway catenary.