频率响应法诊断变压器绕组变形综述

摘要

频率响应法在变压器绕组变形诊断中应用广泛。本文介绍了频率响应法（包括低压脉冲法和扫频法）的原理，分析了典型的测量方法，并从扫频频率范围、频率曲线特性、曲线相似性比较等三方面对国内外研究现状进行了总结。明确了不同频率段与故障类型的关系，对比了不同曲线比较方法的准确性，提出应以频率响应法的检测结果结合其他方法，建立一个多属性决策（MADM）的综合评价体系，为变压器绕组变形的诊断提供有利条件。%Frequency response analysis is now widely used in transformer winding deformation diagnostics.The principle of frequency response analysis (including low-voltage impulse method and sweep frequency response analysis) is brielfy introduced and typical measurement setup is discussed.This paper presents a review on the current state of FRA method on transformer winding deformation diagnostics including selecting of the frequency range,the characteristics of the frequency response curve,and comparing of the curve similarity.In the paper,the relationship of the frequency band and the fault type is deifned.Different methods of comparing frequency response curves are contrasted.This paper suggests a comprehensive criterion should be careful y designed and testiifed and the future research should be emphasized on building a system which can be regarded as a MADM problem.