The Method for Estimating the Inverse Demand Curve of Cournot Model in Electricity Market

전력시장 적용을 위한 쿠르노 모델에서의 역수요함수 추정 방법 제안

  • Published : 2005.02.01

Abstract

At present Cournot model is one of the most commonly used theories to analyze the gaming situation in oligopoly market. But there exist several problems to apply this model to electricity market. The representative one is to obtain the inverse demand curve able to be induced from the relationship between market price and demand response. In Cournot model, each player offers their generation quantity to accomplish maximum profit, which is accomplished by reducing their quantity compared with available total capacity. As stated above, to obtain the probable Cournot equilibrium to reflect real market situation, we have to induce the correct demand function first of all. Usually the correlation between price and demand appears on the long-term basis through the statistical data analysis (for example, regression analysis) or by investigating consumer utility functions of several consumer groups classified as residential, industrial, and commercial. However, the elasticity has a tendency to change continuously according to the total market demand size or the level of market price. Therefore it should be updated as trading period passes by. In this paper we propose a method for inducing and updating this price elasticity of demand function for more realistic market equilibrium.

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References

  1. 김영세, '게임이론', 박영사, 1999
  2. Avinash Dixit & Susan Skeath, 'Games of Strategy', NORTON, 1999
  3. Natalia Fabra, Nils-Henrik von der Fehr, David Harbord, 'Designing Electricity Auctions', Feburary 2004
  4. NECA, 'Australia National Electricity Code'
  5. National Institute of Economic and Industry Research, 'The price of elasticity of demand for electricity in NEM Regions', NEMMCO(National Electricity Market Management Company, 2002
  6. 김남일, '경쟁적 전력시장에서의 정부의 역할', 에너지 경제연구원, 2001. 12.
  7. Glenn Drayton, 'PLEXOS for Power Systems', Drayton Analytics, 2004
  8. 한국전기연구원, 양방향 전력시장에서의 시장지배력 행사 가능성 및 대응방안, 산업자원부,2003.5.