웨이브렛 변환을 이용한 GIS의 부분방전 검출 알고리즘에 관한 연구

A Study on the Algorithm for Detection of Partial Discharge in G15 Using Wavelet Transform

  • 강진수 (성균관대 정보통신공학부) ;
  • 김철환 (성균관대 정보통신공학부)
  • 발행 : 2003.01.01

초록

Gas insulated switchgear(GIS) is an important equipment in a substation. It is highly desirable to measure a partial discharge(PD) in GIS which is a symptom before insulation breakdown occurs. The issue is that the PD signal is weak and sensitive to external noise. In this paper, the algorithm for detection of PD in GIS using wavelet transform is proposed. The wavelet transform provides a direct quantitative measure of spectral content, "dynamic spectrum", in the time-frequency domain. The recommended mother wavelet is 'Daubechies' wavelet. 'db4', the most commonly applied mother wavelet in the power quality analysis, can be used most properly in disturbance phenomena which occurs rapidly for a short time. Through the procedure of wavelet transform, noise extraction and reconstruction, the signal is Analyzed to determine the magnitude of PD in GIS. In experimental results, we can know that partial discharge is exactly detected in combination of Dl and D2 using wavelet transform.transform.

키워드

참고문헌

  1. 최재구, 김익균외 5명 'GIS 이물진단을 위한 초음파 측정 적용기술연구', 대한전기학회 하계학술대회 논문집, pp. 1646-1648 2001. 7
  2. David C. Robertson, Octavia I. Camps, Jeffrey S. Mayer, William B. Gish, 'Wavelet and Electomagnetic Power System Transients', IEEE Trans. on Power Delivery, Vol. 11, No.2, pp. 1050-1058. 1996 https://doi.org/10.1109/61.489367
  3. S. Santoso, 'Power Quality Disturbance Data Compression using Wavelet Transform Method', IEEE Trans. on Power Delivery, Vol. 12, No.3, pp. 1250-1257. 1997 https://doi.org/10.1109/61.637001
  4. 한국전력공사, 창원전력관리처, 'GIS FLOATING 방전예방진단 점검', 최종보고서, 2000. 8
  5. 이우영, 선종호, 최영길, 박순규, 이봉희, '안테나 방식에 의한 부분방전 신호의 응답특성', 대한전기학회 하계학술대회 연구기관 특별 Session 논문집, pp.132-134. 2001. 7
  6. 구선근, 박기준, 윤진열, '가스절연개폐장치용 UHF 부분방전검출장치의 새로운 감도 측정방법', KIEE Trans. Vol. 50C, No 9, 2001
  7. 김영노, 김재철, 전영재, 서인철, 배주천, 강창원, '안테나로 측정된 부분방전신호의 노이즈제거 관한 연구', 대한전기학회 하계학술대회 논문집, pp. 404-406, 2001. 7
  8. 이현동, 주재현, 김기채, 박원주, 이광식, 이동인, '웨이브렛 변환을 이용한 부분방전신호의 잡음제거 특성', 대한전기학회 하계학술대회 논문집, pp. 1679-1681. 2001. 7
  9. 최재구, 김익균, 김민규, 김익수, 김광호, 윤진열, 'GIS 이물진단을 위한 초음파 측정 적용기술연구(II)', 대한전기학회 하계학술대회 논문집, pp. 1646-1648, 2001. 7
  10. 송원표, '800kV 50kA 8000A GIS 개발', 전기저널, pp. 27-35, 2000. 6
  11. 이현동, 이광식, 이동인, '이산 웨이브렛변환에 의한 부분방전페턴 인식', Journal of KIIEE, Vol. 15, No.1, pp. 84-89, 2001. 1
  12. 이재걸, 곽회로, 조국희, 박중신, 'Sf6가스챔버내 금속이물에 의한 부분방전 및 절연파괴 현상', Journal of KIIEE, Vol. 14, No.1, pp. 75-81, 2000. 1
  13. R. E. James and B. T. Phung, 'Development of computer-based measurements and their application to PD pattern analysis', IEEE Trans. Die. and Elect. Insul. Vol. 2, pp. 838-856. 1995 https://doi.org/10.1109/94.469978
  14. H. Okubo, H. Yamashita, N. Hayakawa, T. Ueda, M. Hikita, 'Electromagnetic Spectrum Radiated from Gas Discharges and its Relation to Partial Discharge Characteristics', ETEP Vol. 7, No.1, pp. 57-63. 1997
  15. F. H. Kreuger, E. Gulski, A. Krivda, 'Classification of Partial Discharge', IEEE Trans. El. Insul, Vol. 27, No.5, pp. 909-923. 1992 https://doi.org/10.1109/14.256469
  16. David A. Nattrass, 'Partial Discharge Measurement and Interpretation', IEEE Elect. Insul. Mag., Vol. 4, No.1, pp. 34-41. 1995 https://doi.org/10.1109/57.830
  17. F. H. Kreuger, E. Gulski and A. Krivda, 'Classification of Partial Discharges', IEEE Trans. on Elect Insul., Vol. 28, No.6, pp. 917-931. 1993 https://doi.org/10.1109/14.249365
  18. J. S. Pearson, O. Farish, B. F. Hamton, M. D. Judd, D. Templeton, B. M. Pryor, and 1. M. Welch, 'Partial Discharge Diagnostic for Gas Insulated Substations', IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 2, No.5, pp, 893-905. 1995 https://doi.org/10.1109/94.469984
  19. Boggs, S. A. Fujimoto, N. Collod, M. Thuries, 'The modeling of statistical operating parameters and the computation of operation-induced waveforms for GIS disconnectors', CIGRE, pp. 13-15. 1984
  20. M. Misiti, Y. Misiti, G. Oppenheim, J. M. Poggi, 'Wavelet TOOLBOX', MathWorks, 1996
  21. 김정태, 'Theory and Application of High Voltage Engineering', 교우사, 1994