Aggregation Model and Method Considering Multi-Heterogeneous Energy Storage for Power System Scheduling Requirements

In order to cope with the high uncertainty of the new power system, diversified energy storage has been developed rapidly in recent years. However, the distributed energy storage equipment also causes difficulties for the optimal scheduling of the power system. In this paper, gravity energy storage and compressed air energy storage, which are more mature in current technology application, are taken as the research objects of new energy storage. Firstly, the operation mechanism of two new energy storage devices, gravity energy storage and compressed air energy storage, is analyzed, and the operation model is simplified appropriately. Then, the VB (virtual battery) model is improved, and a unified energy storage model suitable for polymerization is established to realize the model conversion of electrochemical energy storage, gravity energy storage and compressed air energy storage. Finally, an example is used to prove the effectiveness and accuracy of the aggregation method proposed in this paper, and to verify that compared with the decentralized scheduling of energy storage, energy storage can play a greater role in peak shaving and valley filling in the aggregated state, which provides an effective method and idea for the application of multi-heterogeneous energy storage in new power systems.