An Optimal Dispatch Method for the Hydrogen-Electric Coupled Energy Microgrid

The hydrogen-electric coupled energy microgrid (HEMG) is a novel hydrogen-centered energy system that is promising to facilitate the decarbonization of the energy system. The HEMG can realize the deep integration of various renewable energy resources (RES), including photovoltaics (PV), wind turbines (WT), and other clean energy equipment such as polymer electrolyte membrane (PEM), hydrogen storage tanks (HST), solid oxide fuel cells (SOFC), and electric energy storages (EES). However, fluctuating RES outputs and diversified energy demands will greatly challenge the operational performance of HEMG. To achieve efficient coordination, an optimal dispatch method is proposed for the HEMG to minimize the total operating cost and carbon emissions. A mixed-integer linear programming (MILP) model is established to formulate the coordination of multiple energy devices with different operational characteristics in the HEMG. The proposed dispatch method is validated using a HEMG test case under construction in Foshan, China. The results demonstrate its effectiveness in reducing the operating cost and carbon emissions of the HEMG. This study provides a practical approach for the optimal dispatch of HEMGs, which can contribute to the development of sustainable multi-energy systems.