变压器局部放电小波包去噪技术研究

Research on wavelet packet denoising technology for transformer partial discharge

针对变压器检测过程中信号噪声影响检测结果的问题,开展局部放电的小波包去噪技术研究。分析小波包去噪原理,按照一定的步骤对检测的信号进行去噪。采用不同的分解层,分析不同分解层的去噪效果,对比得到信噪比和均值,最终获得最优的去噪分解层为4层,能够达到良好的去噪效果。

Aiming at the problem that signal noise affects the detection results in the process of transformer detection,the wavelet packet denoising technology of partial discharge is studied.Based on the analysis of the principle of wavelet packet denoising,and the detected signal is denoised with certain steps.Using different decomposition layers,the denoising effect of different decomposition layers is analyzed.Comparing the signal-to-noise ratio and mean value,the final result shows that the optimal denoising decomposition layer is 4 layers,which can achieve good denoising effect.