대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

음향 방출 측정법을 이용한 몰드변압기 열화진단

Diagnosis of Insulation Deterioration in Cast Resin Transformer Using Method of AE Measurement

  • 이상우 (영남대학교 전기전자공학부) ;
  • 구경철 (영남대학교 전기전자공학부) ;
  • 김성규 (영남대학교 전기전자공학부) ;
  • 김인식 (경일대학교 전기전자공학부) ;
  • 이동인 (영남대학교 전기전자공학부) ;
  • 김기채 (영남대학교 전기전자공학부) ;
  • 박원주 (영남대학교 전기전자공학부) ;
  • 이광식 (영남대학교 전기전자공학부)
  • Lee, Sang-Woo (School of Electrical and Electronic Engineering, Yeungnam University) ;
  • Gu, Kyung-Chul (School of Electrical and Electronic Engineering, Yeungnam University) ;
  • Kim, Seung-Gyu (School of Electrical and Electronic Engineering, Yeungnam University) ;
  • Kim, In-Sik (School of Electrical and Electronic Engineering, Kyungil University) ;
  • Lee, Dong-In (School of Electrical and Electronic Engineering, Yeungnam University) ;
  • Kim, Ki-Chai (School of Electrical and Electronic Engineering, Yeungnam University) ;
  • Park, Won-Zoo (School of Electrical and Electronic Engineering, Yeungnam University) ;
  • Lee, Kwang-Sik (School of Electrical and Electronic Engineering, Yeungnam University)
  • 발행 : 2000.07.17
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초록

In this paper, a frequency spectra of AE (acoustic emission) signals detected from the partial discharges of an epoxy resin void and a cast resin transformer in operating were analyzed to offer the proper frequency range of AE signals from the corona discharge for the purpose of AE sensor selection, From these results, a frequency spectra of AE signals emitted from the corona discharges in the void of an epoxy resin sample were about 190[kHz] to 220[kHz] by the FFT(fast fourier transform), A frequency spectra of AE signals emitted from a cast. resin transformer with non-load were appeared to be downward of about 140[kHz] by the FFT, and then a frequency spectra of AE signals emitted from the above of cast resin transformer with load were appeared to increase from about 190[kHz] to 220[kHz] by the FFT.

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