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用小波分析去除局部放电在线监测中的白噪干扰 被引量:4

The Method of Eliminating White Noise at On - line detection of Partial Discharge by Wavelet Analysis
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摘要 分析了电力变压器局部放电在线监测中局放信号及白噪声的特征.引出了时—频功率谱的概念.研究了自相关函数的小波变换及它与时—频功率谱的关系.提出了利用小波分析去除变压器局部放电在线监测中的白噪干扰的方法. The characteristics of partial discharge (PD) signal and white noise at on - line transformer monitoring are analyzed. The concept of time - frequency power spectrum is introduced. The relations between the time- frequency power spectrum and wavelet transformation of selfcorrelation function are also studied. A method for eliminating white noise by wavelet analysis is suggested.
机构地区 重庆大学
出处 《高压电器》 CAS CSCD 北大核心 1999年第3期8-12,共5页 High Voltage Apparatus
关键词 电力变压器 局部放电 在线监测 小波分析 power transformer, partial discharge, on - line detection
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  • 1罗兵,孙才新,顾乐观.局部放电在线监测中的电磁干扰及抑制方法[J].高压电器,1995,31(3):44-47. 被引量:15
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  • 7Koning G et al.Noise suppression in partial discharge measuring instruments.8th International Sym.on High Voltage Eng.Paper 63.02 YOKOH-AMA,JAPAN,Aug 23-27,1993.
  • 8Wlodek R et al.System for partial discharge detection under disturbance conditions.8th International Sym.on High Voltage Eng.Paper 63.02,YOKOHAMA.JAPAN,Aug 23-27,1993.

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