Capacity Sharing Strategy and Optimal Operation method of Energy Storage Power Stations Based on Consortium Blockchain

Energy storage power station faces problems such as frequent charging and discharging switching, high energy loss, and poor economic benefits in dealing with the deviation of renewable energy power prediction and generation independently. This paper proposes an optimal operation method for the capacity sharing of multiple energy storage power stations based on a consortium blockchain. Firstly, capacity sharing profit distribution strategy considering opportunity cost and other contribution factors is proposed for energy storage stations. Then, a storage capacity sharing consortium chain, is constructed with capacity sharing smart contracts, which achieve trustworthy sharing of operational data among various energy storage power stations. Finally, optimization model is established to find the optimal operation schedule of energy storage power stations, including constraints of dealing prediction deviation, charging and discharging limitation, and power balance of grid are set to minimize operating costs, and variables of real-time service relationship and reference charging and discharging power. The simulation results show that compared with the independent operation method, the proposed method can reduce operation costs by an average of 45.93 yuan/kWh annually. At least 23.50% of the peak shaving losses caused by the prediction deviation of renewable energy power output in energy storage power stations could be recovered.