Reduced cogeneration feasible operating region for combined heat and power scheduling problems

Gas turbine and heat recovery steam generator (GT-HRSG) packages and independent power producers are playing an increasing role in deregulated electricity supply markets. For industries that require significant amounts of electricity and process steam, cogeneration is a viable option. Existing approaches to the combined heat and power dispatch problem have been limited to static dispatch, "one scheduling interval at a time", approaches. Assumptions of these approaches do not accommodate operational factors of GT-HRSG cogeneration feasible operating regions. In this paper, the role of cogeneration in electricity supply markets and operating factors of GT-HRSG for scheduling problems will be explained and demonstrated.