The Transactions of the Korean Institute of Electrical Engineers P (전기학회논문지P)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Safty Diagnosis and Evaluation of Oil-immersed Transformer using fuzzy Algorithm

퍼지 알고리즘을 이용한 유중 변압기의 안전진단 및 평가에 관한 연구

  • Published : 2006.12.01
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Abstract

In this paper, safety algorithm of transformer is introduced for the sake of MV/LV distribution customers by using fuzzy theory. The current-carrying capacity of transformer is usually determined by the maximum temperature at which the transformer is permitted to operate. Overload of transformer has an effect on transformer utilization rate and maximum temperature rises as well as maximum ambient temperature of insulating materials. Therefore, we proposed the safety algorithm considering the overload of transformer and ambient temperature in this paper. We introduced the correlational equations between each parameters using experimental data of IEEE std C57.91-1995, and deduced the result using fuzzy reasoning. We guessed the safety algorithm making a diagnosis for the safety status of oil-immersed transformer.

Keywords

References

  1. 중장기 전기안전정책 연구방향 I, 산업자원부, 2003.2
  2. 배전용 변압기 최적 부하관리 방안 연구, 한국전력공사 2003.1
  3. 주상변압기 부하관리 개선에 관한 연구, 한국전력공사,1999. 2
  4. IEEE Std. C57.12.90, IEEE Std Test Code for Liquid Immersed Distribution, Power, and Regulating Transformers and IEEE Guide for Short-Circuit Testing of Distribution and Power Transformers, 1993
  5. IEEE Std. C57.12.100, IEEE Std Test Procedure for Thermal Evaluation of Oil-Immersed Distribution Transformers, 1999
  6. IEEE Std. C57.91, IEEE Guide for Loading Mineral-ail-Immersed Overhead and Pad-Mounted Distribution Transformers Rated 500kVA and Less with 65$^{\circ}C$ or 55$^{\circ}C$ Average Winding Rise, 1981
  7. IEC60076-2, Power Transformers-Part 2:Temp. Rise
  8. IEC 60076-11, Power Transformers-Part 11 : Dry- Type Transformers, 2001
  9. J. Dombi, 'Membership Function as an Evaluation', Fuzzy Set and Systems, 35, pp. 1-21, 1990 https://doi.org/10.1016/0165-0114(90)90014-W