变压器局部放电在线检测方法研究

摘要

变压器绝缘系统是电力变压器的重要组成部分，很大程度决定了变压器的可靠性与经济性。局部放电是变压器内绝缘劣化的重要原因，也是变压器绝缘状况的重要特征，本文分析局部放电现象产生的原因，介绍几种变压器局部放电在线检测方法并进行比较，采用一种优化的在线检测方法得到变压器局部放电三维图谱。%Transformer insulation system is an important part of power transformer.To a great extent,it defines the re-liability and economy of transformer.Partial discharge is one important reason of insulation deterioration in transformer, which is also an important feature of transformer insulation condition.This article analyzes the reason of partial discharge phenomenon,introduces several kinds of transformer partial discharge on-line monitoring methods,and carries on the com-parison to these methods.An optimization on-line monitoring method is used to get the three-dimensional map of transformer partial discharge.