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

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

유기 전압비를 이용한 3권선 변압기 보호계전 알고리즘

A Three-Winding Transformer Protective Relaying Algorithm Based on the Induced Voltages

  • 발행 : 2003.03.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This paper proposes a three-winding transformer protective relaying algorithm based on the ratio of the induced voltages (RIV). The RIV of the two windings is the same as the turn ratio for all operating conditions except an internal fault. For a single phase and a three-phase transformer containing the wye-connected windings, the induced voltages of the windings are estimated. For a three-phase transformer containing the delta-connected windings, the induced voltage differences are estimated using the line currents, because the winding currents are practically unavailable. The algorithm can identify the faulted phase and winding if a fault occurs on one phase of a winding. The test results clearly show that the algorithm successfully discriminates internal winding faults from magnetic inrush. The algorithm not only does not require hysteresis data but also can reduce the operating time of a relay.

키워드

참고문헌

  1. A.G. Phadke, J.S. Thorp, Computer Relaying for Power Systems, Research Studies Press LTD., 1988
  2. B. Al-Fakhri, I. A. Elagtal, A Unique Current Differential Based Algorithm for Protection of Three-Winding Transformers and Busbars, IEEE PES 2001 WM, vol. 2 https://doi.org/10.1109/PESW.2001.916937
  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. Y. C. Kang, B. E. Lee, S. H. Kang, S. S. Kim, J. K. Lee, 'A Transformer Protective Relaying Algorithm Using the Ratio of Induced Voltages,' IEEE PES 2001 SM, July 15 - 19, 2001, Vancouver, BC, Canada https://doi.org/10.1109/PESS.2001.969994
  5. P. Bastard, P. Bertrand, 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
  6. Electromagnetic Transients Program Reference Manual, EMTP Theory Book, 1986, Chapter 2