电气化铁路柱上开关站的防雷现状及改进措施  

Current Situation and Improvement Measures of Lightning Protection of On-Pole Switching Kiosk for Electrified Railway

作　　者：刘哲 LIU Zhe(China Railway Fifth Survey and Design Institute Group Co.,Ltd.,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《自动化应用》2024年第4期118-120,共3页Automation Application

摘　　要：雷电对柱上开关站这种新型的电气化铁路牵引供电设施的运行安全存在一定威胁,目前尚未有文献研究其防雷措施。直击雷在落到柱上开关站一次设备上时产生的高电压可以被进出线侧和接触网上网点的避雷器吸收。雷击中柱上开关站的接地部分会产生巨大雷电流,通过容性耦合、感性耦合和地电位反击等方式威胁二次综合自动化设备的安全。双层屏蔽铁箱可有效降低雷电流对二次设备的威胁,因此,柱上开关站既有的防雷措施基本有效。若工程预算充足,可采取加装避雷线和在二次控制端子中额外增设SPD的方法来进一步增强柱上开关站的防雷能力。Lightning strokes could jeopardize the safety operation of on-pole switching kiosk which is a novel traction power supply facility,there are currently no document study the lightning protection of it.The high voltage caused by direct lightning strike can be absorbed by the surge arresters on the incoming outgoing lines and catenary connection point.Secondary integrated automation devices are threatened through capacitive coupling,inductive coupling and grounded potential rising by high current that lightning striking the grounded part of on-pole switching kiosk causes.With 2-layer iron shielding box installed,lightning wave current threat to automation devices is effectively reduced.Thus current lightning protection measures are generally effective.If sufficient project budget is provided,installing extra shielding wire and extra SPD on controlling circuit could better protect on-pole switching kiosk from lightning strikes.

关 键 词：柱上开关站 直击雷 综自系统 避雷线 

分 类 号：TM503[电气工程—电器]