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

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

변류기 전류보상 알고리즘을 이용한 모선보호용 전류 차동계전 알고리즘

A Current Differential Relaying Algorithm for Bus Protection Using a Compensating Algorithm of Secondary Currents of CTs

  • 강용철 (전북대 공대 전자정보공학부·) ;
  • 윤재성 (전북대 공대 대학원 전기공학과) ;
  • 김동용 (전북대 공대 전자정보공학부·)
  • 발행 : 2000.09.01
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⟨ 이전 논문 다음 논문 ⟩

초록

A conventional variable percentage current differential relaying algorithm for bus protection may misoperate for external faults with severe CT saturation and internal faults with high impedance. This paper proposes a percentage differential current relaying algorithm for bus protection combined with a compensating algorithm of secondary currents of CTs. Even though CTs are saturated and their secondary currents are severely distorted, the proposed relaying algorithm does not only misoperate for external faults with CT saturation but also detects the internal faults with high fault impedance. Thus, the method improves the sensitivity of the relays and does not require any counterplan for CT saturation.

키워드

참고문헌

  1. 보호 릴레이 시스템 기본 기술체계, 일본전기학회 기술보고, 제 641호, 1997년 7월
  2. G.Hosemann, H.M.Steigerwald, 'Modal Saturation Detector for Digital Differential Protection', IEEE Trans. Power Delivery, vol. 8, no. 3, pp. 933-940, July 1993 https://doi.org/10.1109/61.252620
  3. Y.C. Kang, J.K. Park, S. H. Kang, A. T. Johns, R.K.Aggarwal, 'An Algorithm for Compensating Secondary Currents of Current Transformers', IEEE Trans. Power Delivery, vol. 12, no. 1, pp. 097, January 1997 https://doi.org/10.1109/61.568231
  4. H.Y.Li, E.P.Southern, P.A.Crossley, S.Potts, S.D.A.Pickering, B.R.J,Caunce, G.C.Weller, 'A New Type of Differential Feeder Protection Relay Using the Global Positioning System for Data Synchronization', IEEE Trans. Power Delivery, vol. 12, no. 3, pp. 1090-1097, July 1997 https://doi.org/10.1109/61.636902