UNIT COMMITMENT PROBLEM FOR POWER SYSTEMS INTEGRATED WITH HYDROGEN ENERGY STORAGE CONSIDERING RENEWABLE ENERGY UNCERTAINTY AND POWER LOSS CONSTRAINTS

Abstract

Unit Commitment (UC) is a critically important task in power system operation, aiming to meet load demand while satisfying technical and safety constraints, and minimizing the total operational cost of the system. This scheduling task becomes even more essential with the increasing integration of new types of power generation into the grid, alongside traditional power sources—such as renewable energy sources (RES) and energy storage systems. Although RES offer advantages such as environmental friendliness and an almost inexhaustible supply, they still pose significant challenges due to their inherent uncertainty, which complicates system operation. Given the diversity of generation sources and their unique characteristics, developing a detailed and optimal model for the UC problem is necessary. In this study, a day-ahead unit commitment model is proposed for a power system that integrates various generation sources, including thermal power, solar power, wind power, and a hydrogen energy storage system (HESS). The model incorporates the uncertainty of RES and considers power losses in the grid. The proposed approach is applied to the IEEE 24-bus test system to enhance practicality and demonstrate the effectiveness of the developed model