Electric automobile charging/discharging/storing integral station power flow three-level converter

The invention provides an electric automobile charging/discharging/storing integral station power flow three-level converter. A control part controls the working of circuits at all levels through a grading coordination control strategy, a first-level alternating current (AC)/direct current (DC) circuit alternating side is connected to an electric network, a direct current side is connected to a total direct current bus, the alternating current of the electric network is converted to the stable direct current and is output to the total direct current bus, a second-level DC/DC circuit high-voltage side is connected to the total direct current bus, a low-voltage side is connected to a corresponding branch direct current bus, the direct current of the total direct current bus is converted to finer direct current which can meet charging requirements of different cells and is output to a corresponding branch direct current bus, a third-level DC/DC circuit high-voltage side is connected to a corresponding branch dir