Tight and Compact MIP Formulation of Configuration-Based Combined-Cycle Units

Journal article (2015)

Authors

G.A. Morales Espana DC systems, Energy conversion & Storage - EEMCS
Carlos M. Correa-Posada Comillas Pontifical University
Andrés Ramos Comillas Pontifical University
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
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Published Date

07-05-2015

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

Private investors, flexibility, efficiency and environmental requirements from deregulated markets have led the existence and building of a significant number of combined-cycle gas turbines (CCGTs) in many power systems. These plants represent a complex optimization problem for the short-term planning unit commitment (UC) carried out by independent system operators due to their multiple operating configurations. Accordingly, this paper proposes a mixed-integer linear programming (MIP) formulation of the configuration-based model of CCGTs, which is commonly utilized for bid/offering market processes. This formulation is simultaneously tighter and more compact than analogous MIP-based models; hence, it presents a lower computational burden. The computational efficiency of the proposed formulation is demonstrated by solving network-constrained UC case studies, of different size and complexity, using three of the leading commercial MIP solvers: CPLEX, GUROBI, and XPRESS.