Assisted Decision Analysis for Active Distribution Grid Flexibility Resource Application

The proportion of renewable energy access to the distribution network is increasing, and the distribution network will be affected by the uncertainty of renewable energy output while consuming renewable energy. In order to ensure the system’s own power balance in real time and to ensure that the decision makers can reasonably allocate the flexibility resources to meet the system’s flexibility demand and cope with the uncertainty that may occur in the system. In this paper, a reasonable flexibility demand model is constructed to accurately predict the flexibility demand of the distribution network system; then the flexibility resources provided by gas turbines, energy storage devices and other controllable resources connected to the active distribution network is analyzed, so as to clarify the support capacity of the existing flexibility resources to the distribution network. Moreover, the shortage of the system flexibility resources is analyzed by adding a penalty term. Finally, the shortage of system flexibility resources is clarified by adding a penalty item, and an auxiliary reference is provided for the optimal allocation of distribution network side flexibility resources.