An Economically Optimized Planning of Regional Integrated Energy System Considering Renewable Energy and Energy Storage

Under the dual pressure of energy and environmental crisis, planning a regional integrated energy system (RIES) is of more practical significance. This paper proposes a capacity planning method that can be applied to the electricity-cold-heat-gas coupling system to achieve the optimal configuration of the RIES. The RIES studied in this paper includes distributed renewable energy, multiple energy storage devices, and coupling equipment such as combined heat and power (CHP) and heat pumps. It not only meets the demand of cold, heat, and electricity load but also improves the economic benefits of the system. First, the model of RIES is established and well described according to the selected devices and system energy supply structure. Then, take the minimum annual economic cost of the planning year as the objective function. The equipment selection and capacity configuration are optimized utilizing mixed integer linear programming (MILP). Finally, the remarkable role of this planning method in optimizing system economic operation is verified through case comparison under different scenarios. The typical scenario analysis also studies the optimization effect of the absorption chiller and multi-energy storage system.