Journal
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
Volume 190, Issue 3, Pages 768-789Publisher
ELSEVIER
DOI: 10.1016/j.ejor.2007.06.050
Keywords
electricity markets; pricing; integer programming duality
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The issue of finding market clearing prices in markets with non-convexities has had a renewed interest due to the deregulation of the electricity sector. In the day-ahead electricity market, equilibrium prices are calculated based on bids from generators and consumers. In most of the existing markets, several generation technologies are present, some of which have considerable non-convexities, such as capacity limitations and large start-up costs. In this paper we present equilibrium prices composed of a commodity price and an uplift charge. The prices are based on the generation of a separating valid inequality that supports the optimal resource allocation. In the case when the sub-problem generated as the integer variables are held fixed to their optimal values possess the integrality property, the generated prices are also supported by nonlinear price functions that are the basis for integer programming duality. (C) 2007 Elsevier B.V. All rights reserved.
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