Evaluation of Maximum Access Capacity for Distributed Generation in Distribution Network Considering Energy Storage Configuration

With the large-scale development of distributed generation (DG), the access capacity of distribution network is increasingly limited. This paper proposes an evaluation method of DG maximum access capacity in distribution grids based on information gap decision theory (IGDT) opportunity constraints, considering the uncertainty of the DG output and the limited investment cost of grid energy storage. First, with the objective of maximizing the DG openable capacity, the IGDT-opportunity constraint-based maximum DG openable capacity assessment model for distribution networks is established by taking into account the investment cost of energy storage as well as constraints such as the opportunity constraints on node voltage and line capacity; Second, the max term, opportunity constraints, and related constraints such as network reconfiguration in the IGDT model are transformed, and the model is evaluated by using the Cplex solver. Finally, an example of active medium voltage distribution network in a region is given to verify the effectiveness of the proposed method.