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

The Korean Institute of Electrical Engineers (대한전기학회)
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Evaluation of Damage from Reclosing Scheme for Power Transfromer

재폐로방식이 전력용 변압기에 미치는 영향 평가

  • Published : 1999.03.01
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Abstract

This paper presents how to evaluate the transformer damage caused by reclosing scheme at the distribution substation. We describe a quantitative relationship between the reclosing scheme and the number of fault current flowing through transformer wsing the probability of a reclosing success/failure. The transformer damage from reclosing scheme is presented using a weight function and a damage function. A weight function is associated with the number of reclosing attempts and the reclosing deadtime to consider cumulative stress caused by reclosing scheme. A damage function is associated with a transformer impact ratio and a transformer functional life. In the case study, the transformer damage is simulated for the probability of a reclosing success. And the evaluation of transformer damage using KEPCO's operation data is performed.

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References

  1. IEEE Trans. On Power Apparatus and Systems v.PAS-94 no.2 Transformers Short-Circuit Strength and Standards - A State-Of-The-Art Paper W. J. McNutt;C. J. McMillen;P. O. Nelson;J. F. Dind
  2. 한국전력공사 전력연구원, KRC-88S-J04 전력용 변압기 사고감소에 관한 연구 (1차년도 : 연구보고서) 김재철(외)
  3. IEEE Trans. on Power Delivery v.10 no.12 Distribution Line Protection Practices - Industry Survey Results IEEE Power System Relaying Committee
  4. IEEE Trans. on Power Apparatus and Systems v.PAS-97 no.5 An Analysis VEPCO's 34.5kV Distribution Feedeyr Faults as Related to through Failure of Substation Transformers L. Johnston;N. B. Tweed;D. J. Ward;J. J. Burke
  5. IEEE Trans. on Power Apparatus and Systems v.PAS-96 no.5 A Proposed Functional Life Test Model for Power Transformers W. J. McNutt
  6. Large Power Transformers K. Karsai;D. Kerenyi;L. Kiss
  7. IEEE Trans. on Power Apparatus and Systems v.PAS-101 no.7 Evaluation of Short-Circuit Strength of Distribution Transformers R. R. P. Sinha
  8. IEEE Trans. on Power Apparatus and Systems v.PAS-95 no.4 The Combined Effect of Thermal Aging and Short-Circuit Stresses on Transformer Life W. J. McNutt;M. R. Patel
  9. Fatigue Damage Crack Growth and Life Prediction F. Ellyin
  10. 한국전력공사 배전처, KRC-88S-J04 배전보호 기술서 송병권
  11. 모델 변전소 보호계전기 동작월보(1991.1~1994.12) 한국전력공사