The invention provides a device of a quick switch of a
wind power plant and a control method. The device is characterized in that a plurality of boosting transformers are gathered in a
wind power gathering
station; a quick switch is connected in parallel with the reactor and then connected in series with the
wind power gathering
station; and the controller is electrically connected with the wind power gathering
station and is electrically connected with the quick switch. The
voltage of the wind power gathering station in real time is obtained; when the change of the
voltage is detected, the quick switch is turned on, and the reactor is switched on; and when it is detected that the
voltage is recovered to the rated voltage threshold value, the quick switch is closed, and the reactor is bypassed. According to the method for installing the quick switch on the high-voltage side of the wind power gathering station, during
voltage fluctuation of an alternating-current
power grid, the voltageat outlets of all wind
turbine generators is adjusted, large-scale off-grid accidents of the wind
turbine generators are prevented, transformation of each wind
turbine generator is avoided, and the high-voltage and low-voltage ride-through capacity of the wind turbine generators in a wind power
plant is improved; and the off-grid probability of the wind turbine generator caused by the fault of the alternating-current
system is reduced.