A wind turbine drive control device according to one aspect of the present invention is a wind turbine drive control device for controlling a plurality of drive devices for moving two structures included in a wind power generation device relative to each other, the wind turbine drive control device including: an obtaining unit for obtaining a plurality of information items related to loads occurring between each of the plurality of drive devices and one of the two structures that receives forces generated by the plurality of drive devices; and a control unit for controlling the plurality of drive devices in such a manner that, in a state where each of the plurality of drive devices is controlled to generate a predetermined braking force, the braking force of at least one first drive device among the plurality of drive devices is increased, based on the plurality of information items.

A wind turbine drive control device according to one aspect of the present invention is a wind turbine drive control device for controlling at least one drive device for moving two structures included in a wind power generation device relative to each other, the wind turbine drive control device including: an obtaining unit for obtaining information related to a load occurring between the at least one drive device and one of the two structures that receives a force generated by the at least one drive device; and a control unit for controlling the at least one drive device so as to cause a force generated by the at least one drive device to be reduced or zero based on the information related to the load obtained by the obtaining unit during a stop period in which the two structures are stopped relative to each other.

One object is to improve the control upon detecting an excessive load in the movable section of a wind turbine, thereby to raise the capacity utilization of the wind turbine. A wind turbine drive system includes: a plurality of driving devices installed in one structure at a movable section of a wind turbine, each of the plurality of driving devices including a drive gear meshing with a ring gear installed in another structure at the movable section of the wind turbine; a state quantity detection unit for monitoring, for each of the plurality of driving devices, a load generated between the drive gear of each of the plurality of driving devices and the ring gear; and a control unit for performing control for reducing the load when the state quantity detection unit detects an abnormal load.

A method (100,200) of reducing a noise emitted by at least one of rotor blades of a wind turbine and a tower of the wind turbine, the wind turbine further including a drivetrain connected to the rotor blades via a hub of the wind turbine, the drivetrain comprising a gearbox, a generator, and a high speed shaft; wherein the gearbox and the generator are coupled by the high speed shaft; the method (100,200) including determining (110,210) an occurrence of the noise, and applying (120,230) a braking torque upon determining the noise, wherein the braking torque is applied to the high speed shaft during normal operation of the wind turbine to reduce the noise.

A wind turbine includes a main shaft (34), a rotor hub (22), a plurality of blades coupled to the rotor hub (22), and a rotor locking disc (32), (32). The main shaft (34) includes a front end portion (34a), and the front end portion (34a) includes a first connecting structure (36). The rotor hub (22) includes a second connecting structure (40). The first connecting structure (36) of the main shaft (34) is fixed to the second connecting structure (40) of the rotor hub (22). The rotor locking disc (32), (32) is integrally formed on the front end portion (34a) of the main shaft (34), and includes a peripheral region. A plurality of rotor locking elements (50), (50) are located in the peripheral region for receiving one or more rotor locking pins (30).

A disk brake for a brake disk ring of an azimuth drive of a wind turbine includes a brake housing which has two housing halves that, on opposite sides, flank receiving jaws for the brake disk ring. At least two brake pistons which hydraulically act upon friction lining carriers assigned to the receiving jaws are mounted in each housing half. At least one housing half has a cleaning channel, extending from a rear side of the housing and towards a front housing area, in which the receiving jaws and the friction lining carriers are provided.

An apparatus for controlling a wind power generator unit includes a deviation detection unit to detect an angular deviation between windward and a current rotation direction of a nacelle after a wind power generator is installed so as to face the windward, and a control unit to receive data detected by the deviation detection unit and to control a brake state and a yawing state of a yaw brake unit, wherein when the nacelle rotates out of a preset deviation range, the control unit temporarily releases frictional force of a brake pad coming into close contact with a disk so as to control a brake operation state of the yaw brake unit.

Rotor restraining and rotating apparatus and methods for a wind turbine (1) are described. An apparatus (200) has a rotatable control element (204) associated with a rotor (8, 203) of the wind turbine, the control element being at least part-circular in form, the control element comprising a plurality of engagement formations (205) disposed on a periphery thereof. The apparatus also has a control member (206), comprising a plurality of engagement formations (207). The control member is movable (208) in a first degree of freedom between: (a) a non-restraining position; and (b) a restraining position in which the control member engagement formations are able to engage the control element engagement formations to restrain rotation of the control element. The control member is also movable (209) in a second degree of freedom. In the restraining position, on movement of the control member in the second degree of freedom, the control member engagement formations are operable to move the control element engagement formations thereby to cause rotation of the control element.

A wind turbine includes a main shaft (34), a rotor hub (22), a plurality of blades coupled to the rotor hub (22), and a rotor locking disc (32), (32). The main shaft (34) includes a front end portion (34a), and the front end portion (34a) includes a first connecting structure (36). The rotor hub (22) includes a second connecting structure (40). The first connecting structure (36) of the main shaft (34) is fixed to the second connecting structure (40) of the rotor hub (22). The rotor locking disc (32), (32) is integrally formed on the front end portion (34a) of the main shaft (34), and includes a peripheral region. A plurality of rotor locking elements (50), (50) are located in the peripheral region for receiving one or more rotor locking pins (30).

A wind turbine and associated control method includes a controller configured with a high speed shaft brake in the generator gear train. The controller receives an input signal corresponding to rotational speed of the high speed shaft, wherein upon the high speed shaft reaching a predefined rotational speed and under a braking condition that calls for the rotor to come to a complete standstill, the controller generates an activate signal to activate the brake. An interlock system is in communication with the low speed shaft sensor and the controller and is configured to override the activate signal when the rotational speed of the low speed shaft is above a threshold value.