An Optimal Scheduling Strategy for an Electric-Hydrogen System Considering Hybrid Energy Storage

Under the background of “carbon peaking and carbon neutrality goals”, the power system is transforming towards higher renewable energy penetration and more energy storage quantities. Because of hydrogen energy’s zero-carbon characteristic, the study of electric-hydrogen system (EHS) is of great significance. To solve this problem, a low-carbon economic scheduling strategy of EHS considering the cooperative output of stationary energy storage (SES) and mobile energy storage (MES) is proposed in this paper. Firstly, the energy flow model of the EHS is analysed. Considering the constraints of the system, the objective function is established to minimize the operating cost and carbon emission of the system. Then, a linearization method is proposed to deal with the nonlinear elements in the constraints, and a mixed-integer-linear-programming (MILP) problem is constructed. Finally, the IEEE-33 power system is used to conduct case studies, and the results verify the effective role of the proposed strategy in renewable energy sources (RES) accommodation, system economic operation and carbon emission reduction.