小波分析在变压器绕组变形诊断中的应用

Application of Wavelet Analysis to the Detection of the Transformer Winding Deformation

探讨了小波分析技术在检测变压器绕组变形的低压脉冲法中的应用。小波分解可剔除信号中的噪声，改善测量重复性。两次测量结果的小波分解的模极大值及其距离可以提取作为判定变压器绕组状态的特征量。

The application of the wavelet analysis technique to the Low Voltage Impulse method (LVI) for the detection of transformer winding deformation is presented. With the wavelet denoising technique, the measurement repeatability in LVI method obtains a considerable improvement. The preliminary investigation also shows that the modulus maximums of wavelet transform and their distance between two measurements may be extracted as the fingerprints of the state of transformer windings.