变压器绕组振动特征提取及其状态识别方法研究

发布时间：2018-01-06 06:05

本文关键词：变压器绕组振动特征提取及其状态识别方法研究　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：有关统计资料表明电力变压器绕组是发生故障最多的部件之一,研究其监测与诊断方法具有十分重要的实际意义。由于变压器绕组松动或变形等机械结构参数的改变,必然会导致变压器器身的机械结构动力学性能发生变化,因此通过研究变压器的振动特性来监测和诊断绕组状况与故障成为了一个行之有效的途径。本文旨在基于振动分析法研究变压器绕组状态识别方法,实现变压器绕组在线状态监测。本文定义了多测点振动特征矢量和矩阵,在此基础上提取变压器绕组振动特征,研究基于特征矩阵相似度的变压器绕组状态识别方法,研究内容包括以下几点： 1.基于变压器振动理论,研究变压器绕组的基本振动特性、变压器振动的传播特性,进而提取变压器油箱壁振动信号中变压器绕组的振动特征； 2.研究变压器油箱表面绕组振动敏感区域及振动测点位置选取方法,针对500kV、220kV变压器的测点选择问题,分别对各电压等级的主变进行振动监测与进一步的数据分析,研究了变压器油箱表面振动不同测点的振动特性,提出能反映绕组振动特性的指标,由此给出变压器绕组状态监测的测点位置选取方法； 3.研究变压器整体振动特性与各个测点之间的关系,在此基础上,重点研究基于特征矩阵相似度的变压器状态识别等分析诊断方法和和算法； 4.为利用油箱表面振动对电力变压器绕组进行带电监测与诊断,以保证其安全、可靠运行,设计并实现了一种基于互联网的电力变压器远程故障诊断系统。
[Abstract]:Statistics show that the power transformer winding is one of the most faulty parts , and it is very important to study its monitoring and diagnosis methods . Because of the change of mechanical structure parameters such as loosening or deformation of the transformer windings , the dynamic performance of the transformer body can be changed . Therefore , it is an effective way to monitor and diagnose the winding condition and fault by studying the vibration characteristics of the transformer . In this paper , the transformer winding state identification method is studied based on the vibration analysis method , and the on - line state monitoring of the transformer winding is realized . Based on the definition of the vibration characteristics of the transformer winding , the transformer winding state identification method based on the characteristic matrix similarity is studied . The research contents include the following points : 1 . Based on the transformer vibration theory , the fundamental vibration characteristics of the transformer windings and the propagation characteristics of the transformer vibration are studied , and then the vibration characteristics of the transformer windings in the vibration signals of the wall vibration signals of the transformer tank are extracted ; 2 . To study the vibration sensitive area and location selection method of vibration measurement points on the surface winding of transformer oil tank . According to the measurement point selection problem of 500kV and 220 kV transformers , the vibration monitoring and the further data analysis are carried out respectively on the main transformer of 500kV and 220 kV transformers . The vibration characteristics of different vibration measuring points on the surface of the transformer oil tank are studied , and the indexes reflecting the vibration characteristics of the windings can be reflected , and the measuring point position selection method for the transformer winding state monitoring is given . 3 . To study the relationship between the overall vibration characteristics of transformer and various measuring points , on the basis of which , the analysis and diagnosis methods and algorithms based on feature matrix similarity are studied . 4 . To carry out the live monitoring and diagnosis of the power transformer winding with the vibration of the tank surface , so as to ensure its safe and reliable operation , and realize a remote fault diagnosis system of the power transformer based on the Internet .

【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM41

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