一起110 kV变压器雷电侵入波事故仿真及分析  

Simulation and Analysis of 110 kV Transformer Lightning Intruding Waves

作　　者：马志青[1] 沈宁[2] 张呈龙 王生杰[1] 马永福[1] 刘敬之[1] 马骥[1] 杨洪易 吴克胜[1] MA Zhiqing1 SHEN Ning2 ZHANG Chenglong3 WANG Shengjie1 MA Yongfu1 LIU Jingzhi1 MA Ji1 YANG Hongyi1 WU Kesheng1

机构地区：[1]国网青海省电力公司电力科学研究院,青海西宁810008 [2]国网青海省电力公司,青海西宁810008 [3]青海电研科技有限责任公司,青海西宁810016

出　　处：《青海电力》2017年第2期50-54,共5页Qinghai Electric Power

摘　　要：为判断一起110kV变压器35kV侧绕组绝缘击穿事故原因,用ATP-EMTP仿真计算了雷击110kV变电站35kV进线段时站内设备的过电压值。仿真结果表明:雷电流直接击中导线,在导线上产生较高电位并沿线传播,在变压器上形成的过电压高于350kV,超过35kV绕组耐受冲击电压,导致变压器中压绕组绝缘击穿。仿真结果为提出防雷改造措施提供了技术依据。In order to judge the cause of the breakdown failure of 35 kV side windings of 110 kV transformer, the overvoltage value of the equipment in the station of 35 kV incoming line of lightning 110 kV substation was calculated by ATP - EMTP simulation. The simulation results show that the lightning current strikes the wire directly, generates high potential on the wire and propagates along the line. The overvoltage formed on the transformer is higher than 350 kV, and the 35 kV winding is resistant to the impulse voltage, resulting in the transformer medium voltage winding wear. The simulation results provide the technical basis for the proposed lightning protection measures.

关 键 词：雷电侵入波 绕组击穿 ATP-EMTP 

分 类 号：TM863[电气工程—高电压与绝缘技术]