Scheduling CCGTs in the electricity pool

This paper presents a review of the scheduling problem of nontraditional generators in England and Wales. It discusses the problems that have been faced, since the privatisation of the industry in England and Wales, by the new tranche of generation which is unable to conform to the classical bidding structure of the original CEGB plant. The more recent capacity comprises combined gas turbines and steam turbines. Such units which may operate as a single unit, or combination of other like units and/or a steam turbine. It is not possible to create a bid pattern for these interlinked modes of operation which fully reflects the cost structure which is represented by the existing three point linear fit. This paper reviews different methodologies that were considered for the scheduling of CCGTs to account for their own unique constraint characteristics and modes of operation. It reports in detail the method that was favoured by a number of the actual CCGT operators, from a technical and economic view point.