A Distributed Energy Storage Aggregation Method Considering Power System Dispatching Requirements and SOC Equilibrium

Energy storage is one of the main means to ensure the stable operation of a high proportion of renewable energy power system. However, due to the wide distribution, diverse types, and diverse characteristics of energy storage power stations, traditional power dispatch models cannot fully tap their support capabilities. A distributed energy storage aggregation method based on SOC equilibrium is proposed for the dispatching and operation requirements of the power system. The distributed energy storage within the dispatching partition is aggregated into large-scale cluater energy storage with stable parameters, and the parameters required for dispatching optimization model are characterized. Finally, based on the power data from HRP38 system, 12 typical scenarios were obtained by clustering. The power sequence of typical scenarios was used to test the adjustment ability of the cluster after energy storage aggregation. The results showed that the proposed aggregation method enables the energy storage cluster to maintain the stability of maximum charging and discharging power and cycle efficiency through internal coordination. The correctness and effectiveness of this theory have been verified.