摘要
理论和实践表明根据电力变压器表面振动信号可以分析判断其绕组和铁芯的工作状态。表面振动信号特征分析是振动法分析电力变压器状态的一个重要基础。应用小波多分辨率技术,分析了现场采集的电力变压器表面三维振动信号,并基于帕赛瓦尔定理计算比较了X、Y、Z三个方向振动信号的频段-能量分布特征,为振动法分析电力变压器运行状态提供参考。
Theoretical analysis and practice experience have shown that the vibration signal on power transformer surface can be used to analyze and judge the working state of the winding and iron core. For vibration analysis, to extract a precise feature of the vibration signal is an important basic work. Three-dimensional surface vibration signal of the running power transformer is analyzed based on wavelet muhiresolution technique. Meanwhile, based on the Parseval theorem, the feature of frequency bands-energy in X, Y, Z directions is computed and compared. It can provide some reference for the working state of power transformer through using vibration analysis.
出处
《电测与仪表》
北大核心
2015年第15期96-100,共5页
Electrical Measurement & Instrumentation
关键词
电力变压器
振动信号
小波理论
频段-能量分析
power transformer, vibration signal, wavelet theory, frequency bands-energy analysis
