An Electric Vehicle Aggregation Region Approach for Active Distribution Network Optimal Dispatch

Electric Vehicle (EV) dispatchable flexibility shows a great potential to minimize the system operation cost. Numerous EVs increase the aggregation complexity with heterogeneous parameters. This paper establishes a decomposable aggregation region method for EVs to take full advantage of the potential flexibility. The proposed model includes the inner-approximate feasible region and the equivalent system cost function. First, considering the demand and EVs’ parameters, EV loads are modeled by an operation region. Second, an inner approximate region is formulated to obtain the maximum potential flexibility of EV by translating a basic homothetic polytope. Finally, the aggregation model participates in the economic dispatch. Simulation tests indicate the great potential of the method for system day-ahead economic dispatch and guarantee solution feasibility.