Active Distribution Network Flexibility Evaluation Method Considering Flexibility Resource

As distributed energy storage, electric vehicles, adjustable loads, micro-grid clusters, 5G base stations, data centers and other flexibility resource-scale clusters are connected to the distribution network, is becoming more and more crucial in order to carry out their flexibility evaluation to guide distribution network planning. First, the connotation of distribution network flexibility and its influencing factors are analyzed. Second, based on the large-scale cluster access of flexibility resources, establish the distribution network flexibility evaluation index. Then, a method for calculating the distribution network flexibility assessment index while taking into account large-scale cluster access to flexibility resources is proposed. Finally, the method presented in this paper is validated using the IEEE 33-bus standard example system.