Optimal Configuration of Distributed Energy Storage for Distribution Network in Peer-to-peer Transaction Scenarios

The integration of high-penetration renewable energy into the distribution network not only promotes distributed generation technology to participate in market competition in the peer-to-peer (P2P) form, but also poses a challenge to the safe and stable operation of the power grid. In order to ensure the safe and stable P2P transactions in the distribution network and to improve the benefits of investing in energy storage for both users and storage suppliers, a two-layer optimal energy storage allocation method is proposed in two transaction scenarios. The upper-layer model aims at minimizing the total investment cost of energy storage, collects one year of operational data of the distribution network for optimization, and calculates the configuration specifications of energy storage to transfer to the lower layer model. The lower-layer model considers two P2P transaction modes, i.e. centralized-bidding and user-driven modes, introduces the concept of regional marginal price to maximize the benefits for both buyers and sellers, and optimally dispatches the energy storage charging and discharging strategies to minimize the energy storage investment costs. Finally, the effectiveness of the proposed method is verified by taking the IEEE 15-bus distribution network as an example. © 2021 Automation of Electric Power Systems Press.