Aiming at the problem of unclear scope of shared energy storage services and redundant configuration of energy storage reserve on the new energy side

an optimal allocation method of shared energy storage considering transmission grid zonal reserve is proposed. Firstly

combined with the power system network structure and dynamic characteristics of nodes and lines

the regional division index of shared transmission network is proposed. Secondly

the regional division problem of transmission network is abstracted into a graph theory model

and the model is simplified based on the modularity index and load rate constraints. The idea of Dijkstra algorithm is used to solve the regional division problem optimize the division index and complete the regional division. Then

a shared energy storage siting and sizing model considering zonal backup is established to realize the optimal configuration of shared energy storage covering the whole network. Finally

the effectiveness of the proposed method is verified based on the example by analyzing the regional division results and the influence of regional division on energy storage configuration.