Sizing Approach of Distributed Energy Storage System in the Presence of Aggregators

With the development of storage technology, the participation of aggregators in the distribution network investment model has become an emerging business model. Therefore, this paper presented a bi-level optimal configuration model of the distributed energy storage system (DESS) for the distribution network. Firstly, the comprehensive investment benefit of DESS is constructed and network loss sensitivity indicators are introduced to evaluate the planning effect. In the upper objective function, energy storage aggregator maximizes the comprehensive income of DESS investment. And the lower level distribution network operator minimizes the network loss sensitivity of the distributed energy storage system after grid connection and adopts adaptive particles. The adaptive particle swarm algorithm is used to solve the upper and lower layers. Finally, the results of the example analysis verify the correctness and effectiveness of the proposed model and method. Through the decision to couple energy storage aggregator and the distribution network operator, the benefits can be achieved from those subjects.