Performance Analysis of Electric Vehicle Fast Charging System with Dual Active Bridge Converter using Triple Phase Shift Modulation

Electric vehicle DC fast charging systems, with power outputs ranging from 50 kW to 350 kW, drastically reduce charging times, enhancing EV convenience by enabling substantial battery charging within minutes. To further improve performance and reduce charging time, there is a growing need for more advanced and efficient DC-DC converter solutions in various charging systems. One of the most widely used solutions is the isolated high-frequency DC-DC Dual Active Bridge (DAB) converter, favored for its high efficiency, compact design, and ability to provide galvanic isolation, which boosts both safety and performance. In this research, a novel 200 kW fast charger was chosen for modeling the fast-charging system. The proposed fast charger consists of two main sections: an AC-DC converter and a DC-DC converter utilizing the DAB technique to perform the charging function. The parameters of the components used in the model are also described. An isolated high-frequency transformer is integrated into the DC-DC converter to ensure isolation between the DC system and the electric vehicle. To enhance power quality, reduce reactive power consumption, and improve fast charging performance, triple phase shift modulation is introduced in this study. The effectiveness of the proposed modulation technique was validated through simulation results, with the modeling and simulations conducted using MATLAB/SIMULINK. The results demonstrate the feasibility of the proposed model.