变压器绕组局部变形故障判断分析  

Judgement of Partial Deformation Fault for Transformer Winding

作　　者：赵祥龙 宋文涛 孙鹏 盖磊 刘成华 

机构地区：[1]国网山东省电力公司临沂供电公司,山东临沂276003

出　　处：《山东电力技术》2017年第7期68-72,共5页Shandong Electric Power

摘　　要：变压器出口附近一旦发生短路故障,绕组必然会承受巨大的电动力冲击,可能会发生绕组变形的情况。介绍了通过变压器油色谱、绕组整体电容、低电压短路阻抗、频率响应和直流电阻等试验项目判断变压器绕组是否发生变形的方法。针对一起220 kV电力变压器35 kV侧母线桥短路事故,说明了变压器绕组变形故障的诊断方法和分析步骤。Once short-circuit accident happened near transformer output terminals,transformer windings would undertake extremely high electric shock,which may even harm the transformer winding formation.The method of judging winding deformation through the tests of transformer oil chromatography,the whole winding capacitance,the low voltage short-circuit impedance,frequency response and direct current resistance is introduced.The diagnostic method and analysis steps of transformer winding deformation failure are illustrated based on a 220 kV power transformer 35 kV side bus bridge short circuit accident.

关 键 词：绕组变形 油色谱分析 频率响应分析 低电压短路阻抗 绕组整体电容 绕组直流电阻 

分 类 号：TM41[电气工程—电器]