Energy Storage Allocation Strategy for Renewable Energy Generation Station Clusters Co-build and Share Considering the Cost of Alliance Cooperation

Shared energy storage is an essential development direction to alleviate the cost pressure of energy storage allocation on the new energy generation site. This paper designs an allocation strategy for co-built and shared energy storage for station clusters accounting for alliance cooperation costs, given the dilemma of ignoring cooperation costs arising from friction of negotiation, information exchange, and other behaviors among stations under joint investment. Firstly, we build a framework of shared energy storage with multiple stations by utilizing the spatial and temporal complementary characteristics of the energy storage demand of various stations. Secondly, we establish a cooperation cost model between stations by considering the "competition" relationship between stations and propose a game model of alliance based on the merger-split algorithm and a cost-sharing method to take into account the overall rationality of the investing entities under the co-construction and the individual rationality under the sharing. Finally, the numerical results verify the superiority and effectiveness of the proposed model and planning method, further reducing the annualized cost compared to that under the grand alliance model, ensuring the efficiency of the field cluster storage allocation and the stable cooperation within the alliance.