Multi-level Estimation Method for the Hosting Capacity of Charging Infrastructure Integration in Power Grid

The rapid expansion of the global electric vehicle market has brought new challenges to the distribution network, including load peaks, degraded power quality, and increased difficulty in grid dispatching. Large-scale EV access is not considered in traditional distribution network planning, making it difficult for existing facilities to accommodate it. This paper proposes an innovative evaluation method that constructs a hierarchical evaluation system from 220kV to $220 \mathrm{~V} / 380 \mathrm{~V}$ for the first time. This system aims to guide the coordinated development of electric vehicle charging infrastructure with the power grid, simplify the power grid’s actual situation, and enhance practicality. Finally, a single 220kV station is used as an example to verify the proposed method.