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

Author

Listed:
  • 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
    Institute for Research in Technology (IIT), ICAI School of Engineering, Comillas Pontifical University, 28015 Madrid, Spain)

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.

Suggested Citation

  • Mauro González-Sierra & Sonja Wogrin, 2023. "Self-Unit Commitment of Combined-Cycle Units with Real Operational Constraints," Energies, MDPI, vol. 17(1), pages 1-18, December.
    • Handle: RePEc:gam:jeners:v:17:y:2023:i:1:p:51-:d:1304754
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    References listed on IDEAS

    as
    1. Fan, Lei & Pan, Kai & Guan, Yongpei, 2019. "A strengthened mixed-integer linear programming formulation for combined-cycle units," European Journal of Operational Research, Elsevier, vol. 275(3), pages 865-881.
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