Unit Commitment Problem Considering Solar Power Penetration Levels and Pumped Hydroelectric Storage

This paper presents a methodology to analyze the unit commitment problem when there is high penetration of solar generation and the changing demand generates a duck shape load curve. The analysis includes pumped hydroelectric storage system that acts by storing or inj ecting energy so that the optimal unit programming is available in terms of generation cost and the start-up of conventional generation units. To solve the mixed-integer nonlinear programming problem of the presented methodology, the YALMIP BMINBNB solver is used in the Matlab® environment. The case studies presented allow observing the effectiveness of the implemented methodology.