In order to improve the consumption rate of clean energy and reduce carbon emissions in the process of building pow-er supply, a flexible AC / DC power supply system topology is presented. The topology realizes the energy interaction of photovoltaic power generation, energy storage and electric vehicle charging and discharging through DC bus, and realizes the energy interaction of AC / DC system through bidirectional AC / DC equipment. In order to ensure the safe, stable and economic operation of the system, amulti time scale scheduling control strategy is proposed. The strategy combines energy storage, photovoltaic power generation, electricvehicle electrical characteristics, power reserve rate and energy re-serve rate in different time scales of millisecond, second to minuteand hour to day to dispatch various power electronic equipment flexibly. The system can maximize the photovoltaic consumption efficiency, reduce power conversion loss, maximize the role of electricvehicles as a flexible resource in energy regulation, and reduce the dependence of flexible DC system on external power supply. The effectiveness of this method is verified by building a MATLAB / Simu-link simulation system.