一、绪论1.选题背景从2011年7月6日洛阳供电段巩义供电车间偃师接触网工区在首阳山站上行西岔区及首阳山至白马寺上行停电作业,造成首阳山站上行6DG责任故障后。2012年4月5日巩义供电车间偃师接触网工区在偃师站西岔区接触网地线再次短接钢轨绝缘,在偃师站接触网集中修施工后,红光带不能消失,经电务部门检修后,恢复信号正常,构成铁路交通D9责任事故。从这两起红光带故障来看,接触网 I. Introduction 1. Theme Background From July 6, 2011 Luoyang power supply section Gongyi power supply plant Yanshi contact network work area in Shouyangshan Station uphill and Shushan Hill to Shirakawa Temple West Shicha upstream power operation, resulting in Shouyangshan Station up 6DG after the failure of responsibility. April 5, 2012 Gongyi power supply plant Yanshi contact network work area in Yanshi Station West Point contact network grounding short again rail insulation, Yanshi station contact network focused repair workers, the red belt can not disappear, the electricity Service department overhaul, the recovery signal is normal, constitute the responsibility of railway traffic accident D9. From these two red belt fault point of view, contact network