대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

침-평판 전극 구조에서 기중 부분방전의 Wavelet 해석

Wavelet Analysis of Partial Discharges in Needle-Plane Air Gap

  • Kang, S.H. (Dept. of Industrial Safety Engineering, Cungcheong College) ;
  • Park, Y.G. (Dept. of Electrical Engineering, Chungbuk Nat'l Univ.) ;
  • Lee, D.J. (Dept. of Electrical Engineering, Chungbuk Nat'l Univ.) ;
  • Shin, D.W. (Dept. of Electrical Engineering, Chungbuk Nat'l Univ.) ;
  • Lim, K.J. (Dept. of Electrical Engineering, Chungbuk Nat'l Univ.) ;
  • Park, D.H. (Dept. of Electrical Engineering, Wonkwang University)
  • 발행 : 1996.07.22
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초록

Partial discharges(PD) in air insulated electric power systems cause power loss, produce interfering electromagnetic radiation, and can indicate incipient failure. An understanding of PD in air gap is clearly important. The Wavelet transformation is an extended method of fourier transformation. The fourier method is a powerful tool for signal analysis, but it can't include informations for time. However tile wavelet transformation analysis can include on the informations of time and frequency at the same time. In this paper we apply the wavelet transformation to the PD signals in needle-plane air gap for tile purpose of analysis of developing aspects of PD. We can analyze the developing aspects of PD, namely, PD current, repetition rates, width of pulse distribution region, pulseless region and frequencies distribution of PD pulses.

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