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一种抑制局部放电在线监测中周期性干扰的新方法 被引量:8

A New Method of Suppressing Periodic Interferences in PD Online Measurement
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摘要 分析了局放信号及各类干扰的特征,引入了相关函数及功率谱的概念,对局放信号及干扰的功率谱进行了研究,提出了利用频域分析识别周期性干扰,并通过数字陷波滤波器抑制周期性干扰的方法。这种新方法特性好,对PD信号失真小,信噪比高,处理时间短等优点。 In the paper, the characteristics of the interferences and PD signal are studied. Their selfcorrelation function and power spectrum are also presented. A new method of suppressing periodic interference through signal selfcorrelation function frequency domain analysis and digital wave trap filter has been proposed. The new method proposed in this paper gives better performance, low distortion to a sequece of PD pulses, higher signalnoise ratios and shorter processing time.
机构地区 重庆大学
出处 《高电压技术》 EI CAS CSCD 北大核心 1998年第2期41-43,共3页 High Voltage Engineering
关键词 局部放电 故障 在线监测 周期性干扰 绝缘 partial discharge power spectrum frequency domain analysis suppressing method
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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
  • 2Stone G C et al.Practical implementation of ultrawideband partial discharge detectors.IEEE Traws.on Elet.Insul,1992,27(1):70.
  • 3Nagesh V et al.Evaluation of digital filters for rejecting discrete spectral interference in on-site PD measurements.IEEE Transactions on Electrica Insulation.28(1),Februar,1993.
  • 4Koning 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.
  • 5Wlodek 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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