대한전기학회논문지:전력기술부문A (The Transactions of the Korean Institute of Electrical Engineers A)

대한전기학회 (The Korean Institute of Electrical Engineers)
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A Transformer Protective Relaying Algorithm Using the Ratio of Induced Voltages

  • 강용철 (전북대 공대 전자정보공학부) ;
  • 이병은 (전북대 공대 대학원 전기공학과)
  • 발행 : 2000.10.01
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초록

This paper presents a transformer protective relaying algorithm using the ratio of induced voltages. The proposed algorithm calculates primary and secondary voltage from currents and voltages of primary and secondary windings. The ratio of primary and secondary induced voltages is equal to the turn ratio in case of the steady state and magnetic inrush. On the other hand, the ratio is different form the turn ratio in case of internal winding faults. The algorithm does not require B-H curve and can reduce the relay's operating time.

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참고문헌

  1. K. Inagaki, M. Higaki, Y. Matsui, K. Kurita, 'Digital Protection Method for Power Transformer Based on an Equivalent Circuit Composed of Inverse Inductance', IEEE Trans. on PWRD, vol.3, no.4, pp. 1501-1510, October 1988 https://doi.org/10.1109/61.193949
  2. A.G. Phadke, J.S. Thorp, 'A New Computer-Based Restrained Current-Differential Relay for Power Transformer Protection', IEEE Trans. on PAS, vol. 102, No.11, pp. 3624-3629, November 1983 https://doi.org/10.1109/TPAS.1983.317711
  3. M.S. Sachdev ,T.S. Sidhu , H.C. Wood, 'A Digital Relaying Algorithm for Detecting Transformer Winding Faults', IEEE Trans. on PWRD, vol.4, no.3, pp. 1638-1648, July 1989 https://doi.org/10.1109/61.32654
  4. P. Bastard, P. Bertand, 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