绝缘电阻试验判断变压器绝缘的判据探讨  

Study on Transformer Insulation Condition Estimation with Insulation-Resistance Measurement

作　　者：陈天翔[1] 王寅仲 海世杰[3] 

机构地区：[1]西安交通大学电气学院,西安710049 [2]兰西热电有限公司,兰州730060 [3]甘肃省电力公司,兰州730050

出　　处：《高电压技术》2004年第10期21-22,26,共3页High Voltage Engineering

摘　　要：理论和实测分析认为 ,大型变压器绝缘状况应用绝缘电阻、吸收比和极化指数 3个测量值的不同情况综合判断 ,某一单项测量结果不合格不决定整个绝缘合格的判断 ,绝缘电阻值很高而吸收比不合格的情况正是绝缘状况良好的依据。最后提出了用绝缘电阻。According to theory analysis and actual measurements, this paper points out that large scale transformers' insulation condition estimation can not depend on absorptivity alone. It should use overall analysis, which consist of 3 factors such as insulation resistance, absorptivity and polarization exponent. Sometimes one measurement data maybe unqualified, however, it can't determine that insulation condition of transformer is unqualified in whole. The transformer's insulation is in good condition while insulation resistance is quite high but absorptivity is unqualified. A reference estimation is presented for large transformers' insulation condition with overall analysis of insulation resistance, absorptivity and polarization exponent.

关 键 词：绝缘电阻值 绝缘状况 吸收比 大型变压器 判据 综合判断 极化 不合格 测量值 综合分析 

分 类 号：TM411[电气工程—电器]