Techno-economic performance analysis of synergistic energy sharing strategies for grid-connected prosumers with distributed battery storages

Renewable energy planning, electrochemical storages, and prosumer-based energy management and sharing in smart grids are critical elements for the transition towards carbon neutrality, whereas the synergistic effects between distributed renewables and storages have not been sufficiently investigated regarding spatiotemporal compensation between energy supply and demand. Moreover, the economic benefits of individual prosumers need to be quantified to motivate their participation in the sharing scheme. In this study, a peer-to-peer (P2P) energy sharing paradigm was formulated, consisting of hybrid solar-wind renewable systems, battery storages, grid-connected commercial prosumers (a high-rise office building and a high-rise hotel), and flexible energy management. Different sharing scenarios with/without storage sharing were studied for performance improvements. Case studies show that, compared to the traditional peer-to-grid operation, the proposed P2P sharing operation with storage sharing can promote the self-consumption from 0.591 to 0.795 and reduce the net cost from 80.4 to 52.7 HKD/m²·a by 34.5%. The formulated energy sharing strategies can also contribute to energy bill savings for each prosumer when considering the profit from transactive energy and grid feed-in tariff, whereas the storage sharing may shorten the battery service life. The research can provide synergistic sharing strategies, energy planning, and economic policy guidelines to achieve carbon-neutral communities.