一起220kV电力变压器线端交流耐压试验击穿故障  

Breakdown Failure of Line Terminal AC withstand Voltage Test for 220kV Power Transformer

作　　者：李永康[1] 杜振斌 石建[1,3] LI Yongkang;DU Zhenbin;SHI Jian(Baoding Tianwei Baobian Electric Co.,Ltd.,Baoding 071056,China;Hebei Key Laboratory of Electromagnetism and Structural Performance of Power Transmission and Transformation Equipment,Baoding 071056,China;Hebei UHV Substation Technology Innovation Center,Baoding 071056,China)

机构地区：[1]保定天威保变电气股份有限公司,河北保定071056 [2]河北省输变电装备电磁与结构性能重点实验室,河北保定071056 [3]河北省特高压变电技术创新中心,河北保定071056

出　　处：《变压器》2024年第7期73-75,共3页Transformer

基　　金：河北省科技重大专项项目(22282102Z)。

摘　　要：本文介绍了一起因静电环引线缺陷导致的220kV电力变压器在进行出厂线端交流耐压试验时的击穿故障。阐述了故障检查情况,根据试验方案及产品结构进行了三维仿真、绝缘裕度计算,并根据检查现象和三维仿真、绝缘裕度计算结果对故障原因进行了分析。最后介绍了修理方案,并提出了后续类似结构产品的改进措施。A breakdown failure of 220kV power transformer in factory line terminal AC withstand voltage test caused by electrostatic ring lead defect is introduced by this authors in this paper.The fault inspection is described,and three-dimensional simulation and insulation margin calculation are carried out according to the test scheme and product structure.The fault cause is analyzed according to the inspection phenomenon and three-dimensional simulation and insulation margin calculation results.Finally,the repair scheme is introduced,and the improvement measures for subsequent similar structural products are proposed.

关 键 词：电力变压器 线端交流耐压试验 静电环 乙炔 三维仿真 

分 类 号：TM406[电气工程—电器]