조명전기설비학회논문지 (Journal of the Korean Institute of Illuminating and Electrical Installation Engineers)

  • 제28권3호
  • /
  • Pages.84-90
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  • 2014
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  • 1229-4691(pISSN)
  • /
  • 2287-5034(eISSN)
한국조명전기설비학회 (The Korean Institute of IIIuminating and Electrical Installation Engineers)
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SWT(Stationary Wavelet Transform)를 이용한 몰드변압기 방전 측정신호의 디노이징 특성 연구

A Study on the Comparison of Denoising Performance of Stationary Wavelet Transform for Discharge Signal Data in Cast-resin Transformer

  • 최명일 (한국전기안전공사 전기안전연구원) ;
  • 김재철 (숭실대학교 전기공학과)
  • 투고 : 2014.01.27
  • 심사 : 2014.02.24
  • 발행 : 2014.03.31
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초록

The partial discharge of Cast-resin Transformer has a difficulty to be analyzed, because it is an abnormal condition signal of which stochastic characteristics varies with time variance. In this study, background noise coming from the outside of the cast-resin transformers through ground wire can be removed and only a discharge signal of which defects are simulated can be obtained, using the wavelet transform method, which is a time-frequency domain analysis technique. As a result, it was confirmed that de-noising using the SWT technique is the best efficient among three methods of the wavelet transform techniques.

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참고문헌

  1. KESCO, "Survey on the use of Resin Transformer in Korea", 1998.
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  3. Kil-Mo Shong, Sun-Bae Bang, Chong-Min Kim, Young- Seog Kim, Myung-Il Choi, "The vibration detection and analysis of 3-phase cast resin transformer in less than 50% load conditions", KIEE, V.61, No.7, pp.7992-997, 2012. https://doi.org/10.5370/KIEE.2012.61.7.992
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