Electric Vehicle Control Scheme for V2G and G2V Mode of Operation Using PI/Fuzzy-Based Controller

This study proposes a control strategy for an electric vehicle (EV) charging which consists of a bidirectional single-phase DC-AC converter and bidirectional conventional buck–boost topology to exchange power between the electrical vehicles (EVs) and power grid. A comparative analysis between PI and fuzzy logic controllers of the system is presented. In the prior stage, a peak voltage of 325 V, 50 Hz AC supply is converted to DC and boosted up to 380 V DC by using a bidirectional single-phase AC-DC converter, and further in the later part, a bidirectional DC-DC buck–boost-based converter is used for both charging and discharging the electric vehicle's battery. The DC-DC converter utilized in the boost mode discharges the battery, and in buck mode, it charges the battery. It is observed that using a PI controller in the system showed 6.77% THD in input grid current and with fuzzy logic controllers THD in input grid current comes out to be 3.75%. The basic operating principle of the employed converter topology has been described in detail. To validate the viability along with the productiveness of the proposed system simulated in the MATLAB/Simulink, the simulation results have been discussed in this paper.