Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A possible application of the PD detection technique using electro-optic Pockels cell with nonlinear characteristic analysis on the PD signals

포켈스 소자를 이용한 PD 신호의 검출 및 비선형적 해석에 관한 연구

  • Lim, Y.S. (Dept. of Electrical Engineering of HanYang Univ. (EM&C)) ;
  • Kang, W.J. (Dept. of Electrical Engineering of HanYang Univ. (EM&C)) ;
  • Chang, Y.M. (Dept. of Electrical Engineering of HanYang Univ. (EM&C)) ;
  • Koo, J.Y. (Dept. of Electrical Engineering of HanYang Univ. (EM&C))
  • Published : 2000.07.17
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Abstract

In this paper, new Partial Discharge (PD) detection technique using Pockels cell was proposed and considerable apparent chaotic characteristics were discussed. For this purpose, PD was generated from needle-plane electrode in air and detected by optical measuring system using Pockels cell, based on Mach-Zehnder interferometer, consisting of He-Ne laser, single mode optical fiber, 50/50 beam splitter and photo detector. A qualitative analysis was carried out by drawing Return map for the normalized time series of the detected PD signals. The results are as follows:(a) Fixed points, between 0.7 and 1.0, are appeared clearly in the right upper area of the return map as the increase in the number of obtained data.(b) Considerable periodicity have been remarked even though exact period and length can not be determined.(c) The self-similarity can be also observed inasmuch as the late paths do not follow the previous ones. Accordingly, exact quantitative analysis such as embedding dimension, fractal dimension, and Lyapunov exponents should be carried out for deducing the quantitative properties regarding PD phenomena.

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