小波包分析在变压器偏磁振动信号的应用

Application of Wavelet Packet Analysis in Bias Vibration Signal of Transformers

某电站500 kV变压器直流偏磁时,噪声和振动增大,在油箱表面通过振动采集仪表进行振动信号采集。此文介绍了小波包分解和小波包能量提取方法,对变压器的振动信号进行了小波包分析,从而得出直流偏磁引起的振动的信号小波包能量布特点。

When there is DC magnetic bias to the 500 kV transformer of a power station,the noise increases and vibration intensifies,and then vibration signals are collected with the Vibration Collector on the surface of the fuel tank.This paper has introduced wavelet packet decomposition and wavelet packet extraction method,analyzed wavelet packet for the vibration signal from the transformer,getting characteristics of the wavelet packet energy spreading of vibration signals caused due to DC magnetic bias.