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小波去噪最优阈值自适应选取概要

30 李剑等:局部放电在线监测中小波阈值去噪法的最优阈值自适应选择 its application in partial discharge detection[J] . IEEE Trans on Dielectrics and Electrical Insulation,2002,9(3:446-457. Vol. 30 No. 8 wavelet polarity of modulus maxima[J].Power System Technology, 2003,27(5:55-57,71. [12] Saito N,Beylkin G.Multiresolution representations using the autocorrelation functions of compactly supported wavelets[J] . IEEE Trans on Signal Processing,1993,41(12:3584-3590. [13] 徐冰雁,黄成军,钱勇,等.多小波相邻系数法在局部放电去噪中的应用[J].电网技术,2005,29(15:61-64,70. Xu Bingyan, Huang Chengjun,Qian Yong,et al.Application of multiwavelet based neighboring coefficient method in denoising of partial discharge[J]. Power System Technology,2005 ,29(15: 61-64,70. [14] Donoho D L . De-noising by soft-thresholding[J]. IEEE Trans on Information Theory,1995,41(3:613-627. [15] 王立欣,诸定秋,蔡维铮.局部放电在线监测中基于小波变换的阈值消噪算法研究[J].电网技术,2003,27(4:46-48,78. Wang Lixin , Zhu Dingqiu , Cai Weizheng . Wavelet transform based de-noise algorithm by thresholding in on-linepartial discharge detection[J] . Power System Technology , 2003 , 27(4 : 46-48, 78. [16] Zhang X P,Desai M D. Adaptive denoising based on SURE risk [J].IEEE Signal Processing Letters,1998,5(10:265-267.收稿日期:2006-01-09。

作者简介:李剑 (1971 —,男,博士,副教授,研究方向为电气设备绝缘在线监测与诊断技术;孙才新 (1945 —,男,教授,博士生导师,中国工程院院士,长期从事高电压绝缘与在线监测及诊断技术的教学与研究工作。

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作者简介:易俊(1980 -,男,博士研究生,从事大电网安全运行等方面的研究工作,E-mail:yjun@;周孝信 (1940 -,男,中国科学院院士,长期从事电力系统分析与控制方面的研究。

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