Power system based on mobile energy storage device and control method thereof

The invention relates to the technical field of electric power guarantee, and particularly provides an electric power system based on a mobile energy storage device and a control method thereof, and the system is characterized in that the system comprises at least one power supply unit; the power supply unit comprises a main power supply module, a mobile energy storage device, a generator and a bus; the main power supply module, the mobile energy storage device and the generator are sequentially connected; a connection point between the main power supply module and the mobile energy storage device is connected to a bus, and the bus is connected with a load; the main power supply module is used for supplying power to a load; the mobile energy storage device is used for supplying power to the load when the main power supply module cannot supply power to the load; and the generator is used for supplying power to the load when both the main power supply module and the mobile energy storage device cannot supply po