Self-Unit Commitment of Combined-Cycle Units with Real Operational Constraints

Mauro González-Sierra () and Sonja Wogrin
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Mauro González-Sierra: Facultad de Ingenieria, Universidad Tecnologica de Bolivar, Cartagena 130010, Colombia
Sonja Wogrin: Institute of Electricity Economics and Energy Innovation, Graz University of Technology, 8010 Graz, Austria

Energies, 2023, vol. 17, issue 1, 1-18

Abstract: This paper highlights the importance of accurately modeling the operational constraints of Combined-Cycle Gas Turbines (CCGTs) within a unit-commitment framework. In practice, in Colombia, when given an initial dispatch by the Independent System Operator, CCGT plants are operated according to the results of heuristic simulation codes. Such heuristics often omit technical operating constraints, including hot, warm, or cold startup ramps; the minimum operation hours required for a gas turbine to start a steam turbine; the relationship between the dispatched number of steam and gas turbines; the load distribution among gas turbines; and supplementary fires. Most unit-commitment models in the literature represent standard technical constraints like startup, shutdown, up/down ramps, and in some cases, supplementary fires. However, they typically overlook other real-life CCGT operating constraints, which were considered in this work. These constraints are crucial in integrated energy systems to avoid equipment damage, which can potentially put CCGT plants out of service and ultimately lead to lower operating costs.

Keywords: Combined-Cycle Gas Units (CCGs); unit commitment; steam turbines; startup ramps (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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