Power coordination control method based on direct-drive wind-turbine-generator wind farm

The invention discloses a power coordination control method based on a direct-drive wind-turbine-generator wind farm. The power coordination control method is characterized in that the voltage of the wind farm is detected to judge whether the condition of starting a wind farm power coordination control mode is met; when the condition is not met, wind turbine generators in the wind farm adopt normal control modes, and when the condition is met, the wind farm is in the power coordination control mode; and the active and reactive control amounts of the wind farm are figured out in the power coordination control mode and then are distributed to single wind turbine generators in the wind farm to serve as control signals to adjust the output of the power of the single wind turbine generators, and further, the closed-loop control on bus bar voltage of the wind farm is realized. The capacity of adjusting the reactive power of the wind farm is improved to maintain the voltage level at an outlet of the wind farm, thereby preventing or avoiding higher impact on a power grid, and guaranteeing the continuous and stable operation of the wind farm; and the power coordination control method can perform reasonable coordination control on the active and reactive power generation of the wind farm and effectively provide reactive power support for the voltage at the outlet of the wind farm, so that the voltage stability at an access point is maintained.