基于小波去噪的变压器局部放电在线测量方法

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI:10.1109/ELINSL.2004.1380446

Jian Li, Youyuan Wang, L. Du, Zhuorui Jin, Yang Yang

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引用次数: 3

摘要

本文介绍了基于阈值化和经验小波系数收缩的PD信号去噪方法。针对局部放电脉冲幅值等于或小于离散谱干扰(DSI)时小波去噪效果不理想的问题，提出了将小波与二阶点阵无限脉冲响应(IIR)陷波滤波器相结合的方法来提高变压器局部放电在线测量系统检测信号的信噪比。给出了仿真结果和实际数据实例。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Wavelet-based denoising for PD online measurement of transformers

The method based on thresholding and shrinking empirical wavelet coefficients is introduced in this paper for denoising PD signals. Because the wavelet-based denoising can not give a satisfied results while PD pulse amplitude is the same as or less than that of discrete spectral interferences (DSI), the wavelet combined with 2nd order lattice infinite impulse response (IIR) notch filter is proposed to enhance the signal-to-noise ratio (SNR) of signal detected by PD online measurement system of transformers. We present the results from simulations and real data examples.

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Conference Record of the 2004 IEEE International Symposium on Electrical Insulation

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