Energy-Sharing Model With Price-Based Demand Response for Microgrids of Peer-to-Peer Prosumers

TLDR

Feed‑in tariffs that promote local photovoltaic consumption make energy sharing among neighboring prosumers more economical than independent operation. The study proposes an energy‑sharing model with price‑based demand response for peer‑to‑peer PV microgrids. A dynamic internal pricing scheme driven by the supply‑to‑demand ratio, an equivalent cost model incorporating consumption flexibility, and a distributed iterative algorithm are used to solve the model. A practical case study demonstrates that the method reduces PV prosumers’ costs and enhances energy sharing.

Abstract

According to the feed-in tariff for encouraging local consumption of photovoltaic (PV) energy, the energy sharing among neighboring PV prosumers in the microgrid could be more economical than the independent operation of prosumers. For microgrids of peer-to-peer PV prosumers, an energy-sharing model with price-based demand response is proposed. First, a dynamical internal pricing model is formulated for the operation of energy-sharing zone, which is defined based on the supply and demand ratio (SDR) of shared PV energy. Moreover, considering the energy consumption flexibility of prosumers, an equivalent cost model is designed in terms of economic cost and users' willingness. As the internal prices are coupled with SDR in the microgrid, the algorithm and implementation method for solving the model is designed on a distributed iterative way. Finally, through a practical case study, the effectiveness of the method is verified in terms of saving PV prosumers' costs and improving the sharing of the PV energy.