Optimal Scheduling of Electric-hydrogen Coupled Multi-microgrid System Based on Upper and Lower Energy Management

In the face of energy shortages and environmental pollution, finding green energy sources to replace fossil fuels is a very popular research topic. This paper proposes a hybrid energy storage multi-microgrid structure that replaces the traditional battery energy storage microgrid with electric-hydrogen coupling. Then, a hybrid energy management optimization model of upper and lower levels is proposed. The lower layer optimization objective was to minimize the lowest operating cost of single microgrid in isolated island mode, and the upper layer optimization objective was to minimize the overall operating cost of multi-microgrid. Finally, in the energy scheduling of multi-microgrid, the concept of adjustable power is used to manage renewable power generation resources. Through simulation, the proposed multi-microgrid energy management scheme can effectively improve the economy and flexibility of the system.