500 kV变压器高压套管闪络事故模拟试验分析与预防  

Simulation Test Analysis and Prevention of High Voltage Bushing Flashover Accident of 500 kV Transformer

作　　者：许广虎 金铭 张陵 吴标 何丹东 王建 XU Guanghu;JIN Ming;ZHANG Ling;WU Biao;HE Dandong;WANG Jian(Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830011,China)

机构地区：[1]国网新疆电力有限公司电力科学研究院,乌鲁木齐830011

出　　处：《电瓷避雷器》2022年第5期178-185,共8页Insulators and Surge Arresters

基　　金：国网新疆电力有限公司科技项目(编号:5230DK200005)。

摘　　要：随着“雨线北移”现象的出现,我国西北地区输变电工程户外电气设备面临着污秽+雨闪的威胁概率越来越高。笔者分析了一起电厂500 kV变压器高压套管污雨闪事故,通过进行闪络事故的模拟试验,对发生原因进行仿真计算等方面的深度剖析,找出事故时气候的特点及套管结构型式设计未能适应新的西北地区的降水特点。并为防止类似事故的再次发生,提出了加装辅助伞裙来防范雨闪事故的措施。通过现场实践应用,为优化高压套管设计制造和提高西北地区防雨闪技术提供技术参考。With the emergence of the phenomenon of "rain line moving northward", the outdoor electrical equipment of power transmission and transformation projects in Northwest China is facing a higher and higher threat probability of rain flash. A pollution rain flashover accident of high voltage bushing of 500 kV transformer in power plant is analyzed. Through the simulation test of flashover accident and the in-depth analysis of simulation calculation of the causes, the characteristics of climate at the time of the accident and the design of bushing structure are found out, which can not adapt to the precipitation characteristics of the new northwest area. In order to prevent the reoccurrence of similar accidents, the mea-sures of installing auxiliary shed to prevent rain flash accidents are put forward. Through on-site practical application, it provides a certain technical reference for optimizing the design and manufacture of high voltage casing and improving the rain flash prevention technology in Northwest China.

关 键 词：高压套管 污雨闪 雨倾角 伞间距 伞裙 

分 类 号：TM40[电气工程—电器]