Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Distribution Characteristics of AE Signals in Insulation Deterioration and AE Noise in Cast Resin transformer

절연물의 열화에 의한 AE신호와 변압기 외함의 AE노이즈 분포

  • Lee, Sang-Woo (School of Electrical Electronic Engineering, Yeungnam University) ;
  • Kim, In-Sik (School of Electrical and Electronic Engineering, Kyungil University) ;
  • Kim, Lee-Kook (School of Electrical and Electronic Engineering, Kyungil University) ;
  • Park, Won-Zoo (School of Electrical Electronic Engineering, Yeungnam University) ;
  • Lee, Kwang-Sik (School of Electrical Electronic Engineering, Yeungnam University)
  • 이상우 (영남대학교 전기공학과) ;
  • 김인식 (경일대학교 전기전자공학부) ;
  • 김이국 (경일대학교 전기전자공학부) ;
  • 박원주 (영남대학교 전기공학과) ;
  • 이광식 (영남대학교 전기공학과)
  • Published : 2002.07.10
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Abstract

In this paper, frequency spectra of AE signals detected from respective the insulation deterioration were analysed to under ac high-voltage application using epoxy resin sample and insulation oil. Also, frequency spectra of AE signals generated from the load currents in the actual operating transformer of 500[kVA] under distribution system of 22.9[kVJ] were also analysed to distinguish the AE signals due to void discharges from the magnetic circuit noises in transformer. As the experimental results, we could distinguish the AE signals whether those signals were caused due to the void discharges or due to the magnetic circuit noises by analyzing the frequency spectrum of AE signals.

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