一起主变全绝缘管型母线异常事件分析  

Analysis on an Abnormal Event of Fully Insulated Tubular Bus in a Main Transformer

作　　者：闻煜峰 魏泽民 王耀升 赵玉成 闻芷馨 WEN Yufeng;WEI Zeming;WANG Yaosheng;ZHAO Yucheng;WEN Zhixin(Jiaxing Power Supply Company,Jiaxing 314000)

机构地区：[1]国网浙江省电力有限公司嘉兴供电公司,浙江嘉兴314000

出　　处：《电力安全技术》2023年第9期27-30,共4页Electric Safety Technology

摘　　要：因全绝缘管型母线制造工艺不良,金属屏蔽层首末边沿场强分布不均,在户外长期运行下局部击穿后造成间隙性放电,导致220 kV变电站主变运行异常。针对该事件,解体全绝缘管型母线进行检查并结合部分变电站全绝缘管型母线缺陷统计进行分析,并提出相应的改进措施。Due to poor manufacturing process of fully insulated tubular bus and uneven distribution of field strength along the first and last edges of the metal shielding layer,intermittent discharge was caused after partial breakdown during long-term outdoor operation,resulting in abnormal operation of the main transformer in a 220 kV substation.In response to this incident,the fully insulated tube type bus is disassembled for inspection and analyses is made with consideration of the fully insulated tubular bus defect statistics of other several substations,based on which the corresponding improvement measures are proposed.

关 键 词：变电站 主变 全绝缘管型母线 绝缘击穿 

分 类 号：TM63[电气工程—电力系统及自动化]