基于最大隶属度原则的变压器绕组变形判别方法

A Method of Recognizing Transformer Winding Deformation Degree Based on Maximum Membership Principle

变压器绕组变形情况可分为严重变形、变形、轻微变形、无变形4个等级,设为模式识别中的标准模式,提出根据在线漏抗检测方法测量的漏抗值判别绕组变形情况的方法。首先根据变压器短路试验后短路电抗大小和绕组变形情况的统计分析结果,确定阻抗变化率与标准模式之间的隶属度关系,再利用最大隶属度原则及给定阈值,根据短路电抗大小判断其绕组变形情况。实现变压器在线漏抗检测的软硬件设计,并且将该方法应用于变形程度判别,具有实用性。

Transformer winding deformation can be classified into four degrees,namely,serious,common,slight,and none.These four degrees are set as standard mode of pattern recognition.A method of recognizing winding deformation by detecting leakage is put forward.Firstly,establish the relation between resistance change rate and standard mode according to short-circuit resistance and the degree of the winding deformation after short-circuit test.Then,determine the deformation degree by means of the maximum membership principle and the threshold.The hardware and software about the leakage online detection is designed,and the method is used to recognize the deformation degree.This method is proved to be practical.