Abstract:

This paper presents an integrated control framework for a DC microgrid (MG) with electric vehicle (EV) charging stations, energy storage unit, and AC/DC loads. The MG consists of two DC buses, photovoltaic arrays, energy storage, three EV charging stations, and a three-phase inverter. Control strategies are proposed to select the charge-discharge mode of EVs without negatively affecting the MG, and to coordinate production and demand management. A central control system manages generation, consumption, and energy storage, monitoring the charging/discharging unit's performance and relevant commands. A specific control strategy is implemented for fault ride-through (FRT), ensuring the MG feeds its loads in any operating condition. Nonlinear simulations in MATLAB/SIMULINK software show the proposed control methods effectively achieve all objectives.