摘要
35 kV变压器由于绝缘水平低及防雷设计考虑不全面等原因,经常发生因雷电侵入波导致的中性点或匝间绕组绝缘损坏的问题。为对35 kV变压器雷电侵入波响应特性进行分析,基于电磁暂态分析软件ATP-EMTP建立了变压器绕组梯形等值电路,根据典型的35 kV变电站接线情况,对35 kV近区线路各种情况下遭受雷电绕击和反击导致的侵入波过电压进行了仿真计算,指出大幅值雷电流反击近区线路是导致35 kV变压器绕组绝缘损坏的原因。使用避雷器作为治理手段,对比了3种安装方式的有效性,给出了最优的35 kV变压器雷电侵入波治理方案。
Due to the low level of insulation, inadequate consideration of lightning protection and other reasons, Transformer winding neutral or inter-winding insulation are often damaged caused by lightning intrusion wave. The trapezoidal equivalent circuit of transformer winding is established based on the electromagnetic transient analysis software ATP-EMTP. According to the typical 35 kV substation connection, the overvoltage of lightning strikes and counterattack are analyzed with different near area transmission line tower parameters, it's pointed out that 35 kV transformer winding insulation damage is caused by large-scale lightning current counterattack near-line line.Arrester was used as governance mean for lightning intrusion wave of 35 kV transformer, the effectiveness of the three installation methods are compared and Recommend the best solution is recommended.
作者
刘守豹
吴晓晖
曾宏
雷潇
廖文龙
LIU Shoubao;WU Xiaohui;ZENG Hong;LEI Xiao;LIAO Wenlong(State Grid SichuanElectric Power Research Institute, Chengdu 610072, China;State Grid Sichuan Electric Power Company, Chengdu 610041, China)
出处
《电瓷避雷器》
CAS
北大核心
2019年第3期145-152,共8页
Insulators and Surge Arresters
关键词
变压器
近区线路
雷电侵入波
梯形等值电路
避雷器
transformer
near-area overhead lines
lightning intrusion wave
trapezoidal equivalent circuit
arrester
作者简介
刘守豹,(1983—),男,博士,高级工程师,主要研究方向:电力系统电磁暂态分析和工程电磁场数值计算。
