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

The Korean Institute of Electrical Engineers (대한전기학회)
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Estimation of Maximum Loadability in Power Systems By Using Elliptic Properties of P-e Curve

P-e 곡선의 타원 특성을 이용한 전력계통 최대허용부하의 예측

  • 문영현 (연세대학 전기공학과) ;
  • 최병곤 (연세대학 전기공학과) ;
  • 조병훈 (연세대학 전기공학과) ;
  • 이태식 (LG-EDS 시스템(주) CALS&COM 사업부)
  • Published : 1999.01.01
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Abstract

This paper presents an efficient algorithm to estimate the maximum load level for heavily loaded power systems with the load-generation vector obtained by ELD (Economic Load Dispach) and/or short term load forecasting while utilizing the elliptic pattern of the P-e curve. It is well known the power flow equation in the rectangular corrdinate is jully quadratic. However, the coupling between e and f makes it difficult to take advantage of this quadratic characteristic. In this paper, the elliptic characteristics of P-e curve are illustrated and a simple technique is proposed to reflect the e-f coupling effects on the estimation of maximum loadability with theoretical analysis. An efficient estimation algorithm has been developed with the use of the elliptic properties of the P-e curve. The proposed algorithm is tested on IEEE 14 bus system, New England 39 bus system and IEEE 118 bus system, which shows that the maximum load level can be efficiently estimated with remarkable improvement in accuracy.

Keywords

References

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