电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2015年
15期
96-100
,共5页
电力变压器%振动信号%小波理论%频段-能量分析
電力變壓器%振動信號%小波理論%頻段-能量分析
전력변압기%진동신호%소파이론%빈단-능량분석
power transformer%vibration signal%wavelet theory%frequency bands-energy analysis
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。
理論和實踐錶明根據電力變壓器錶麵振動信號可以分析判斷其繞組和鐵芯的工作狀態。錶麵振動信號特徵分析是振動法分析電力變壓器狀態的一箇重要基礎。應用小波多分辨率技術，分析瞭現場採集的電力變壓器錶麵三維振動信號，併基于帕賽瓦爾定理計算比較瞭X、Y、Z三箇方嚮振動信號的頻段-能量分佈特徵，為振動法分析電力變壓器運行狀態提供參攷。
이론화실천표명근거전력변압기표면진동신호가이분석판단기요조화철심적공작상태。표면진동신호특정분석시진동법분석전력변압기상태적일개중요기출。응용소파다분변솔기술，분석료현장채집적전력변압기표면삼유진동신호，병기우파새와이정리계산비교료X、Y、Z삼개방향진동신호적빈단-능량분포특정，위진동법분석전력변압기운행상태제공삼고。
Theoretical analysis and practice experience have shown that the vibration signal on power transformer sur -face 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 multiresolution 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 .
