电力变压器直流电阻不平衡故障分析  

Fault Analysis of Unbalanced DC Resistance of Power Transformer

作　　者：李双双 郭文红 张晓明 李家琪 张晓旭 LI Shuangshuang;GUO Wenhong;ZHANG Xiaoming;LI Jiaqi;ZHANG Xiaoxu(State Grid Jibei Electric Power Co.,Ltd.,Zhangjiakou Power Supply Company,Zhangjiakou 075000,China;Hebei Huadian Guyuan Wind Power Co.,Ltd.,Zhangjiakou 075000,China;Zhangjiakou Cigarette Factory Co.,Ltd.,Zhangjiakou 075000,China)

机构地区：[1]国网冀北电力有限公司张家口供电公司,河北张家口075000 [2]河北华电沽源风电有限公司,河北张家口075000 [3]张家口卷烟厂有限责任公司,河北张家口075000

出　　处：《电工技术》2025年第2期152-154,共3页Electric Engineering

摘　　要：直流电阻测试是电力变压器出厂、交接、大修、预试试验中必不可少的试验项目。当变压器发生故障时,通过直流电阻试验可检验电力变压器绕组的整体连接情况和导线质量。总结了常见的引起直流电阻不平衡的故障原因,通过分析案例中直流电阻不平衡的数据表现,诊断确定了变压器故障位置,为变压器检修提供检修依据和方向,为提高变压器检修质量积累经验。DC resistance test is an indispensable test item in the factory,handover,overhaul,and pre-test test of power transformers.When the power transformer break down,we can check the overall connection of the power transformer windings and the quality of the wire by DC resistance test.This paper summarizes the common failuere causes of nnbalanced DC resistance.By analyzing the date performance of unbalanced DC resistance in the cases,the fault locations of the transformer have been diagnosed,whice provides maintenance basis and direction for transformer maintenance,and accumulates experience for improving transformer maintenance quality.

关 键 词：电力变压器 直流电阻 直阻不平衡 

分 类 号：TM41[电气工程—电器]