Permanent magnet direct drive wind power plant reactive voltage control strategy based on adaptive droop control

The invention discloses a permanent magnet direct drive wind power plant reactive voltage control strategy based on adaptive droop control, and the method comprises the following steps: establishing a wind power plant grid-connected model, and determining output power curves of a wind turbine generator at different wind speeds and reactive capacities of the wind turbine generator in different operation states; providing two control modes of the wind turbine generator, adopting a maximum power tracking control mode when the grid-connected point voltage is stable, and controlling the blade tip speed ratio to be kept at the optimal value, so the maximum wind energy capturing state is achieved; when the voltage drop of the grid-connected point is serious, if the reactive capacity of the wind turbine generator is sufficient, enabling the grid-side converter to adopt adaptive droop control, adaptively adjusting the droop coefficient according to the reactive capacity of the generator, and increasing the reactive po