TARIFF IMPACT ON EV CHARGING STATION LOAD PROFILE: ANALYSIS OF REAL DATA

Abstract

The paper investigates the influence of a differentiated tariff on the load profile formation of a commercial electric vehicle charging station in the context of using charging infrastructure as a demand response resource in the Integrated Power System of Ukraine. The study is based on primary transaction data from a 7 kW AC charging station located in Pivdennoukrainsk for the period from July to September 2025. The applied tariff model provided a substantial reduction in the charging price during the daytime interval from 12:00 to 17:00, down to 2.2 UAH/kWh compared with the base tariff of 16 UAH/kWh, which corresponded to the period of potential surplus generation from solar power plants. Processing of the charging session data showed an increase in monthly electricity consumption from 170 kWh in July to 902 kWh in August, followed by a decrease to 414 kWh in September, indicating a behavioral response of users to the tariff incentive. It is shown that adaptive pricing can contribute to the concentration of part of the charging demand within predefined time intervals; however, a quantitative assessment of this effect requires consideration of the charging session accounting structure, seasonality, number of users, and availability of alternative charging stations. The obtained results confirm the feasibility of further development of dynamic tariffs for charging infrastructure as an element of Demand Response programs and as a means of forming controllable load capable of increasing the flexibility of the power system. Ref. 10, fig. 2, table.