TY - JOUR TI - Tight and compact MIP formulation of configuration-based combined-cycle units JO - IEEE Transactions on Power Systems A1 - Correa-Posada, C.M., Morales-EspaƱa, G., Ramos, A. VL - 31 IS - 2 PY - 2016-03-01 PS - 1350 EP - 1359 DO - 10.1109/TPWRS.2015.2425833 AB - 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. ER -