Coordinated siting and sizing for integrated energy system considering generalized energy storage*

Coordinated siting and sizing for energy stations and supply networks in low-carbon park-level integrated energy systems are significant for economic improvement and carbon emissions reduction. To minimize total planning costs and carbon emissions of park-level integrated energy systems, a two-stage coordinated siting and sizing framework for the energy station and supply network of a low-carbon park-level integrated energy system considering generalized energy storage is proposed in this paper. In the first stage, a siting optimization submodel for the energy station and supply network in park-level integrated energy system is established to minimize the total comprehensive energy distance values from the energy station to all load stations, in which the virtual network flow theory is introduced to characterize and linearize the connectivity constraints of the supply network. Then, a sizing optimization submodel for the energy station and supply network in park-level integrated energy system is proposed in the second stage based on the optimal siting strategies of park-level integrated energy system, in which the generalized energy storage is considered to minimize planning costs and carbon emissions. Finally, case studies are conducted on an improved 55-bus park-level integrated energy system to verify the effectiveness of the proposed model, and simulation results demonstrate that the proposed model outperforms other existing planning models in terms of achieving lower total comprehensive energy distance values, total planning costs and carbon emissions.