Protective Relaying Algorithm for Transformer Using Wavelet Transform

웨이블렛 변환을 이용한 변압기 보호계전 알고리즘

  • Published : 2003.02.01

Abstract

The power transformer is one of the very important electric facilities in power systems. Recently, current differential relay is widely used to protect such power transformer But if inrush occurs in transformer, relay can be tripped by judging like internal fault. Therefore the correct discrimination between internal winding fault, inrush and overexcitation should be performed. This paper presents a new protective relaying algorithm which discriminates inrush, internal faults and overexcitation of transformer modelled using BCTRAN and HYSDAT of EMTP. Discrimination between internal winding fault and inrush is revealed in simulation within 1/2 cycle after fault. Accordingly, it is evaluated that the proposed algorithm has better discrimination characteristics in various cases thin the current relaying for protection of transformer.

Keywords

References

  1. Walter A. Elmore, 'Protective Relaying Theory and Applications', ABB Power T&D Company Inc., pp. 145-165, 1994
  2. C. E. Lin, C. L. Huang and J. C. Yeh, 'Investigation of Magnetizing Inrush Current in Transformers. Part Ⅰ-Numerical Simulation', IEEE Trans. on PWRD. Vol. 8, No. 1, Jan. pp. 246-254, 1993 https://doi.org/10.1109/61.180343
  3. C. E. Lin, C. L. Huang and J. C. Yeh, 'Investigation of Magnetizing Inrush Current in Transformers. Part Ⅱ-Harmonic Analysis', IEEE Trans. on PWRD. Vol. 8, No.1, pp. 255-263, 1993 https://doi.org/10.1109/61.180344
  4. J.Lewis Blackburn, Protective Relaying Principles and Applications, Second Edition, Marcel Dekker Inc., Chap 9, pp. 275-326, 1998
  5. 김상태, 이승재, 강상희 외 3명, '전압, 전류 변화 추이를 이용한 전력용 변압기 보호계전 알고리즘', 대한전기학회 논문지, 50권 4호, pp. 157-165, 2001. 4
  6. B. Kasztenny, E. Rosolowski, M. M. Saha, B. Hillstrom, 'A Self-Organizing Fuzzy Logic Based Protective Relay - An Application to Power Transformer Protection', IEEE Trans. on PWRD, Vol. 11, No. 3, pp. 1119-1127, July 1997 https://doi.org/10.1109/61.636910
  7. Moises Gomez-Morante, Denise W. Nicoletti, 'A Wavelet-based Differential Transformer Protection', IEEE Trans. on Power Deilvery, Vol. 14, No. 4, October 1999 https://doi.org/10.1109/61.796228
  8. Xiangning Lin, Pei Liu, Shijie Cheng, 'A Wavelet Transform Based Scheme Power Transformer Inrush Indentification', IEEE PES WM. Vol. 3, pp. 1862-1867, 2000 https://doi.org/10.1109/PESW.2000.847636
  9. 권명현, 박철원, 신명철, '도비시 웨이블렛 변환을 이용한 변압기의 여자돌입과 내부 권선고장 판별논리 기법', 대한전기학회 논문지, 50권 5호, 2001. 5
  10. Martin, 'Wavelet and Filter Banks : Theory and Design', IEEE Trans. on Signal Processing, Vol. 40, No. 9, pp. 2207-2232, 1992 https://doi.org/10.1109/78.157221
  11. Wavelet Toolbox For Use With MATLAB
  12. P. Bastard, P. Betrand, M. Meunier, 'A Transformer Model for Winding Fault Studies', IEEE Trans. on PWRD, Vol. 9, No. 2, pp. 690-699, April 1994 https://doi.org/10.1109/61.296246