基于扩展Debye模型的变压器油纸绝缘时域介质响应法分析  

Time-domain Analysis of Dielectric Response in Oil-paper Insulation Using Extended Debye Model

作　　者：王林[1] 周利军[1] 李先浪[1] 吴广宁[1] 刘君[1] 李延涛[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《高压电器》2013年第5期39-43,共5页High Voltage Apparatus

基　　金：国家自然科学基金项目(51107105/E0705);四川省杰出青年基金项目(2011JQ0009)~~

摘　　要：时域介质响应法是近年来备受关注的一种诊断变压器油纸绝缘的新方法,现已由实验室研究发展到对变压器的现场测量。变压器油纸绝缘系统的等效电路可用扩展Debye模型表示,笔者对1台50 kV.A变压器进行时域介质响应法测量,并运用最小二乘法对实验数据进行拟合,通过测量值与拟合值的相对平均误差来确定扩展Debye模型的n值,根据扩展Debye模型计算出了电气绝缘参数并与测量值进行了比较。研究结果表明,时域介质响应法能有效地评估变压器油纸绝缘的水份含量情况和绝缘状况。Dielectric response methods, as a new way to diagnose oil-paper insulation of transformer, have caught much attention recently and been developed from the laboratory studies to the field measurements. The equivalent circuit of the transformer oil-paper insulation system could be represented by extended Debye model, a 50 kV.A transformer was tested by time-domain response measurements in the paper, and the test results were fitted by least squares method, and value of n of extended Debye model was determined by the relative error between measured and fitted values, and electrical insulation parameters were calculated and compared with measured values. Results showed that the time domain response method could effectively assess the moisture content and the insulation condition of transformer oil-paper insulation.

关 键 词：时域介质响应法 油纸绝缘 扩展Debye模型 极化电流 回复电压 

分 类 号：TM855[电气工程—高电压与绝缘技术]