Dawit Habtu (PhD)Habtamu Beyene2025-01-142025-01-142024-10https://etd.aau.edu.et/handle/123456789/4093Bidirectional electric vehicle charging systems have emerged as a revolutionary technology. This innovative solution allows two-way power flow. Currently, the use of electric vehicles has been increasing daily in Addis Ababa. This popularity of electric vehicles in Addis Ababa is expected to have a negative impact on existing electricity networks due to the increased energy demand from these vehicles on the the utility of the city. Moreover, there is a shortage of fast electric vehicles charging stations for electric vehicles owners in Addis Ababa. Consequently, this thesis aims to create a two-way smart charging station in Addis Ababa to provide advantages for both the electric utility company and owners of electric vehicles. The quadratic programming optimization technique is the method adopted to develop an intelligent charging plan in order to lower the cost of charging for both, electric utility and electric vehicles users. With this method, the utility load can be significantly leveled all day, because the electric vehicle owners can charge the electric vehicle at scheduled least loaded hours and the utility can obtain power from electric vehicle batteries for highest load balancing during smartly scheduled peak load hours. An algorithm is developed to regulate the energy flow between vehicle-to-grid and grid-to-vehicle operational modes. The validity of the proposed bidirectional charging station model and design was verified by MATLAB/Simulink. From the simulation result, it has been observed that electric vehicle can be charged at off-peak hours during the grid-to-vehicle scenario and also electric vehicles can provide active and reactive power support to the utility at peak load hours during the vehicle to grid scenario. As a result, with these two scenarios, load leveling can be realized. The purpose of reducing charging costs is realized by the adopted optimization techniques. With this optimization technique, electric vehicle users can benefit from supporting the grid during peak load hours and can charge the battery at a minimum of 15 minutes. The utility of a city can reduce about 50 MW of power in a day and can reduce large investment costs for upgrading the existing distribution network to meet new power demand due to the addition of electric vehicles to the grid system.en-USAddis AbabaSmart chargingBi-directional DC-DC converterVehicle-to-gridGrid-to-vehicle.Thesis