【作者】 孔杰；

【导师】 刘昌玉；

【作者基本信息】 华中科技大学 ， 水利水电工程， 2006， 硕士

【摘要】 电力变压器是电力系统的重要设备之一,一旦发生故障,则会对电力系统的安全运行带来很大影响。本文回顾了国内外变压器监测理论的发展过程,总结了现有研究成果,并在此基础上,采用多信息综合在线监测理论,基于TCP/IP协议的数据通讯,研究开发了变压器状态监测与故障诊断系统。从功能角度,变压器状态监测与故障诊断系统分为“数据采集”、“数据通讯”以及“故障诊断”三大模块;本文从这三大模块着手,阐述了变压器状态监测与故障诊断系统的研究与开发。数据采集模块是状态监测与故障诊断系统的基础。本系统运用高精度传感器实现高速实时数据采集,获取变压器的实时状态信息,为故障诊断提供分析基础。数据通讯模块以协议芯片W3100为核心,通过TCP/IP协议将采集到的变压器的状态信息传送给故障诊断模块。故障诊断模块是状态监测与故障诊断系统的分析平台,本文基于LabVIEW软件和Microsoft Access小型数据库实现了波形显示、数据管理、数据分析等功能。并采用小波算法对状态信号进行时频分析,以预测、诊断变压器故障。本系统实现了实时状态监测和基本的故障分析,为变压器的状态检修提供了依据。更多还原

【Abstract】 The power transformer is an important equipment in electric power system .If it was in trouble,it will threaten the safe operation of the electric power system. The thesis reviews the development history and summarizes the updated research achievements of power transformer monitor theory. Condition monitoring and fault diagnosis system of the power transformer based on TCP/IP protocol data communication and the principle of the multi-information on-line monitoring is studied and developed in this thesis.The condition monitoring and fault diagnosis system of the power transformer functionally consists of three modules: data collection、data communication and fault diagnosis. This thesis elaborates the research and development of the power transformer condition monitoring and fault diagnosis system according to these three modules.Data collection module is the base of the condition monitoring and fault diagnosis system. In order to provide assist to fault diagnosis, hardware circuit board is used to collecting high speed real-time data of the multiplex sensors to get real-time status information.W3100 is the kernel of the data communication module. The status information of the power transformer is transmitted to the fault diagnosis module by TCP/IP protocol. Fault diagnosis module is the analysis platform of the condition monitoring and fault diagnosis system. Wave band display、data management and data analysis is realized by LabVIEW and Microsoft Access database. The power transformer’s condition is forecasted according to analyzing the frequency-domain and time-domain characteristics of the condition information by wavelet arithmetic.The real-time condition monitoring and initial fault diagnosis is realized by the system. And provide gist to realize condition based maintenance.更多还原