一起330 kV变压器绕组电阻异常原因分析及处理  

Cause Analysis and Treatment of Abnormal Winding Resistance of a 330 kV Transformer

作　　者：李科云 蒋超伟 柴毅 赵辉 崔巍 LI Ke-yun;JIANG Chao-wei;CHAI Yi;ZHAO Hui;CUI Wei(State Grid Ningxia Electric Power Co.,Ltd.Ultrahigh Voltage Company,Yinchuan 750011,China)

机构地区：[1]国网宁夏电力有限公司超高压公司,宁夏银川750011

出　　处：《电工电气》2022年第12期47-50,共4页Electrotechnics Electric

摘　　要：针对一起330 kV电力变压器绕组直流电阻测试数据异常的缺陷,对绕组分段测试,通过相间数据横比和历史数据纵比计算,分析和判断异常原因,准确研判出缺陷具体部位。经现场对缺陷进行检修处理,验证了分析方法的正确性及判断的准确性,并提出了预防此类故障的措施,提高了变压器运行的可靠性。As the abnormal test data of winding DC resistance of a 330 kV transformer occurs,the winding is tested in a segmented way to analyze the reason for the abnormal data.Through making horizontal comparison of phase data and vertical comparison of historical data,the paper finds out the specific defect parts accurately.The correctness of this analysis method and the accuracy of judgment are verified by onsite inspection of defect parts,and preventive measures of this kind of faults are put forward to improve the reliability of transformer operation.

关 键 词：变压器 直流电阻 不平衡 套管 

分 类 号：TM407[电气工程—电器]