The problem of ensuring that there is enough generation capacity to meet future demand has been an issue in market design since the beginning of the deregulation process. Although ideally the market itself should be enough to provide adequate investment incentives, there are several factors that prevent this result from being achieved, and some actual markets have already experienced problems related with a lack of generation capacity. A regulatory framework to address this question is presented. The procedure is based on an organised market where reliability contracts (based on financial call options) are auctioned, so both their price and their allocation among the different plants are determined through competitive mechanisms. This results in a stabilisation of the income of the generators and provides a clear incentive for new generation investment, with a minimum of regulatory intervention. Additionally, the method represents a market-compatible mechanism to hedge demand from the occurrence of high market prices.
Keywords: Capacity markets, capacity payments, long term guarantee of supply, generation adequacy, wholesale market design, electricity markets
IEEE Transactions on Power Systems. Volume: 17 Issue: 2 Pages: 349-357
Journal Impact Factor: JCR impact factor 5.680 (2016)
DOI reference: 10.1109/TPWRS.2002.1007903
Published on paper: May 2002.