Unified Unit Commitment Formulation and Fast Multi-Service LP Model for Flexibility Evaluation in Sustainable Power Systems

Abstract

Classical unit commitment (UC) algorithms may be extremely time-consuming when applied to large systems and for long-term simulations (for instance, a year) and may not consider all the features required for flexibility assessment, including analysis of different reserve types. In this light, this paper presents a novel flexibility-oriented unified formulation of a large-scale scheduling model considering multiple types of plants (including storage) and reserves, which can seamlessly model binary (BUC), mixed integer linear programming (MILP), and relaxed linear programming (LP) UC. Comparisons are carried out on several case studies for a reduced model of Great Britain, assessing loss of ac..