Research on Optimal Dispatching of DC Microgrid Considering the Demands of Electric Vehicle Users

Aiming at the different charging demands of EV (electric vehicle) users in the DC microgrid, an economic dispatching strategy of the DC microgrid considering the demand of EV users is proposed. According to the different demands of EV users, the strategy divides EV charging types into four types: instant charging type, flexible charging type, compensation charging type and night charging type. Users upload reservation information through the mobile App one day in advance. According to the reservation information and day-ahead prediction data, the microgrid dispatch center aims to minimize the total operating cost of the system to dispatch the controllable units within the constraint conditions. The charging time of EV is reasonably planned to improve the operation economy of micro-grid. At the same time, it also reduces the charging cost of EV users and improves their enthusiasm to participate in micro-network scheduling. Finally, the economic efficiency and effectiveness of the proposed scheduling strategy are verified by the simulation results of an example.