CONTROL UNIT OF WIND POWER STATION AND METHOD FOR CONTROLLING WIND POWER STATION

In a wind power station with a wind turbine (4) and a generator (3) having a horizontal rotating axis a control unit is used to control a setting mechanism for changing a setting angle (ß) of the rotor blades (42) of the wind turbine (4). The control unit is provided with a screw servo drive (1) comprising a control element situated along a rotary axis of a rotor of the wind turbine (4) and an executing element placed slideably along the rotary axis of the rotor of the wind turbine (4) and connected with the control element by an active power transmission thread. The executing element, being a screw, of the screw servo drive (1) is coupled with the setting mechanism of the setting angle (ß) of the rotor blades (42) of the wind turbine (4) and displacement of the executing element along the rotary axis of the wind turbine rotor causes the setting angle (ß) of the wind turbine rotor blades change. The control element of the screw servo drive (1) is set in rotational motion by an electric control motor (2) mounted by its body (25) to stationary elements of the wind power station. The electric control motor causes the control element to rotate at required rotational speed and to change the setting angle (ß) of the rotor blades (42) of the wind turbine (4) until the rotor of the wind turbine (4) rotates at the required rotational speed and to maintain the rotational speed of the rotor of the wind turbine at the required rotational speed using the active power transmission thread of the control element and the executing element.