Full-direct-current wind power grid-connected system based on energy coordination control and alternating-current fault ride-through method

The invention discloses a full-direct-current wind power grid-connected system based on energy coordination control and an alternating-current fault ride-through method. The system mainly comprises a plurality of direct-current fans, an offshore direct-current booster station, a direct-current side centralized energy consumption device, an onshore converter station and an alternating-current power grid. If the AC power grid has a short-circuit fault, the onshore converter station and the offshore DC booster station actively boost the voltage of the DC bus and the voltage of the bus bar of the wind power plant respectively, and the fault information is transmitted to the output port of the DC fan while energy recovery is carried out in a short time by using an internal capacitor. If the port voltage exceeds a preset threshold value I, an additional power controller is started, and rotor energy storage and pitch angle increase are used for reducing surplus power; and if the port voltage exceeds a preset thresho