GIS牵引变电所馈线侧防雷分析  

Analysis of Lightning on the Feeder Side of GIS Traction Substation

作　　者：张先怡[1] 吴广宁[1] 曹晓斌[1] 罗勋[1] 龚宏奎[1] 高峰[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《电瓷避雷器》2013年第5期7-12,共6页Insulators and Surge Arresters

基　　金：国家电网公司科技项目(编号:2011-WG-4);铁道部重大专项课题(编号:2011T008);中央高校基本科研业务费专项资金(编号:SWJTU11CX035)

摘　　要：雷击牵引变电所馈线侧时,绝缘子被击穿闪络,反击雷电侵入波沿线传入牵引变电所内部设备,在设备上产生过电压,将严重威胁运输安全。利用ATP-EMTP暂态仿真软件,对GIS牵引变电所进行雷击仿真计算。验证了避雷器的保护效果,电缆长度越长,波前陡度越大;分析了馈线长度对侵入波过电压的影响,确定主要影响因子是绝缘子的闪络个数;绝缘子闪络个数越多,雷电流经地的分流次数越多,产生的反击侵入波减弱,在设备上产生的过电压越小。Breakdown will occur on the insulator when lightning strikes on the feeder side of traction substation. The impinging surge caused by lightning back flashover will propagate along the line to the equipment in the traction substation resulting to overvoltage which will threat the operation and transportation safety. By use of ATP-EMTP to take the lightning simulation calculation, the protection effect of the attester is verified. The wave front steepness increases with the length increased of the electric cable. The influence of feeder line length on the impinging surge overvoltage is analyzed, and the key factor is the number of broken down insulators. The higher of the broken down insulator number, the lower of the overvohage magnitude on the equipment.

关 键 词：牵引变电所 雷电侵入波 防雷 ATP—EMTP 

分 类 号：TM863[电气工程—高电压与绝缘技术] TM922.4