Multi-Objective Optimal Charging Control of Electric Vehicles in PV charging station

This paper analyses the optimal operation of a commercial PV charging station with 10 chargers for electric vehicles. The charging station is connected to the main distribution network and can buy and sell electricity to the grid. A multi-objective optimization algorithm that minimizes the operational costs of the charging station and costs related to the power losses in the distribution grid has been proposed. In the proposed method, the interests of the charging station owner and distribution system operator were considered. Constraints related to user comfort in terms of the minimum level the state of charge when the vehicle leaves charging station and the technical limitations of the grid were also considered. The analysed period is one day with a fifteen-minute resolution. Simulation results show that the controlled "smart" charging reduces the operational costs of charging stations and decreases charging impact on the grid.