Comparative Assessment of EV Hosting Capacity in Distribution Grids Under Various Operational Constraints

In the presence of Electric Vehicle Charging Stations (EVCSs), the hosting capacity (HC) is a vital criterion for Distribution System Operators (DSOs) to ensure the reliable and stable operation of the Distribution System (DS). This paper details a comparative study designed to highlight and quantify the constraints on HC imposed by the need for reliable and efficient DS operating conditions. Our analysis considers four distinct scenarios: a baseline (Scenario 1) without EVCS installations; a scenario (Scenario 2) where EVCS deployment is limited only by existing transformer size; a scenario (Scenario 3) that introduces line current constraints; and a final scenario (Scenario 4) that further incorporates node voltage constraints. The analysis highlights the need for strategic EVCS integration to ensure DS efficiency and reliability. The efficacy and accuracy of the proposed methodology are validated using comprehensive simulations on the IEEE 69-bus system.