Design, Modelling, and Control of a Grid-Connected Dc Fast Charging Station for Electric Vehicles

This paper presents the design, modelling, and control of a grid-connected direct-current fast-charging (DCFC) station for electric vehicles (EVs).The proposed system comprises a three-phase AC grid, a front-end converter (FEC) with filtering and measurement components, and an isolated DC-DC converter that provides galvanic isolation and regulated power to the EV battery.The FEC control strategy performs AC-to-DC power conversion while maintaining the DC-link voltage, whereas the DC-DC converter control regulates the battery charging current and voltage.The model also enables monitoring of key operating variables, including AC-side electrical quantities, DC-link conditions, battery state of charge (SOC), and supplycurrent waveforms.These results demonstrate the effectiveness of the proposed architecture and control strategies for highpower EV charging applications.