Optimal Operation Planning for a Coordinated Control Method in a Hybrid System of Battery Storage and Electrolyzer for Supply and Demand Adjustment Market

ABSTRACT This paper proposes a novel coordinated control method, termed “H2‐Assisted Control,” and an operation planning approach to enhance the power supply and demand adjustment capability of a hybrid system composed of battery storage and water electrolyzer. The H2‐assisted control facilitates power exchange between the battery storage and the electrolyzer, ensuring sufficient charge/discharge margin of the battery required for power supply and demand adjustment. Based on this control method, a mathematical optimization model for operation planning is developed, which considers the charge/discharge margin requirements of the battery storage and shifts part of these requirements to hydrogen storage. Simulation results validate that the proposed plan can be effectively executed using the H2‐assisted control and demonstrate an increase in feasible adjustment capacity (ΔkW), thereby leading to improved operational profit.