Improvement of Carrying Capacity of Distribution Network Based on Aggregated Power Characteristics of Electric Vehicles

A scheme based on electric vehicle (EV) aggregate power characteristics is proposed to improve the capacity of distribution network with large-scale EVs and PV access, which is suitable for the operation optimization of integrated photovoltaic-storage-charging (PVSC) stations in distribution network and the improvement of the power grid's ability to absorb distributed vehicle-to-grid (V2G) resources and PV resources. The proposed EV aggregate load characteristic model is helpful to construct the mapping relationship between EV carrying capacity of power grid and its capacity parameters and voltage level, and further construct the optimization model. Furthermore, the optimal control scheme of EV and PV capacity of distribution network is proposed. Simulation results show that the proposed control scheme can accommodate more EVs than the traditional scheme under the same capacity of energy storage equipment.