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

The Korean Institute of Electrical Engineers (대한전기학회)
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The Development of the Transmission Marginal Loss Factors with Consideration of the Reactive Power and its Application to Energy Spot Market

무효전력을 고려한 한계송전손실계수 산정 방법론 개발 및 현물시장에의 적용

  • 박종배 (건국대학 공대 전기공학과) ;
  • 이기송 (건국대학 공대 전기공학과) ;
  • 신중린 (건국대학 공대 전기공학과) ;
  • 김성수 (한국전력거래소)
  • Published : 2003.07.01
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Abstract

This paper presents a new approach for evaluating the transmission marginal loss factors (MLFs) considering the reactive power. Generally, MLFs are represented as the sensitivity of transmission losses, which is computed from the change of the generation at reference bus by the change of the load at the arbitrary bus-i. The conventional evaluation method for MLFs uses the only H matrix, which is a part of jacobian matrix. Therefore, the MLFs computed by the existing method, don't consider the effect of the reactive power, although the transmission losses are a function of the reactive power as well as the active power. To compensate the limits of the existing method for evaluating MLFs, the power factor at the bus-i is introduced for reflecting the effect of the reactive power in the evaluation method of the MLFs. Also, MLFs calculated by the developed method are applied to energy spot markets to reflect the impacts of reactive power. This method is tested with the sample system with 5-bus, and analyzed how much MLFs have an effect on the bidding/offer price, market clearing price(MCP), and settlement in the competitive energy spot market. This paper compared the results of MLFs calculated by the existing and proposed method for the IEEE 14-bus system, and the KEPCO system.

Keywords

References

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