A method for operating a wind turbine, and the wind turbine has an aerodynamic rotor with a rotor hub and with rotor blades of which the blade angle can be adjusted, and the aerodynamic rotor can be adjusted in respect of its azimuth direction, and the method comprises the steps of detecting a storm situation in which the prevailing wind is so strong that the wind turbine is moved to a coasting mode for self-protection purposes, orienting the rotor in respect of its azimuth position into a low-loading orientation in relation to the wind, in which orientation the wind turbine is subjected to as little loading as possible by the wind from a main wind direction, detecting at least one loading (L.sub.M) which is caused by a gust of wind and acts on the rotor, and adjusting at least one of the rotor blades in respect of its blade angle such that the at least one rotor blade is subjected to as little loading as possible by the causative gust of wind.

A wind power plant has at least one rotor. The rotor has at least two rotor blades and each rotor blade is rotatable about a substantially radially aligned adjustment axis. At least one angle adjustment device is provided for adjustment of the rotor blades. The angle adjustment device has a control disk and at least two cam disks interacting with the control disk. Each cam disk is rotatably mounted about a rotation axis. The rotation axis of the respective cam disk coincides, and is in particular superimposed, together with the respective adjustment axis of the respective rotor blade. The noise development, the maintenance expense, and/or costs of a wind power plant are reduced in that the cam disks are functionally effectively permanently coupled via at least one coupling element.

A method for damping an oscillation of a tower of a wind turbine is disclosed, wherein a pitch angle of each of the one or more rotor blades is individually adjustable, the method comprising damping the oscillation of the tower by pitching each rotor blade individually according to tower damping pitch control signals, wherein each tower damping pitch control signal comprises a first periodic component, where a first frequency of the first periodic component corresponds to a frequency difference between a tower frequency of the oscillation of the tower and a rotor frequency of a rotation of the rotor, and where a second periodic component has been reduced or removed. A second frequency of the second periodic component corresponds to a frequency sum of the tower frequency and the rotor frequency.

A method of controlling a wind turbine having a nacelle, a rotor, a rotating hub, a first rotor blade and at least a second rotor blade, both rotor blades being mounted to the hub. The method includes measuring the strain in the first rotor blade by a strain measurement device attached to the first rotor blade; and choosing the operational parameters of the wind turbine based on the measured strain such that fatigue damage of the second rotor blade is reduced. A wind turbine is controlled by such a method.

A rotor hub of a wind turbine comprising a hub housing, which has a plurality of connecting flanges, which are each adapted for connection of a rotor blade, wherein each of the rotor blades is coupled to a pitch drive for rotating the rotor blade, wherein the pitch drive is connected to an arrangement of electrical control devices, which are adapted to control the pitch drive. The arrangement of the control devices is provided in a module as a structural unit, the module being connected as a whole to the hub housing.

A grounding circuit for a backup power source used to power a pitch motor of a pitch system in a wind turbine is provided. The grounding circuit includes one or more switching elements configured to selectively couple the backup power source to a charging circuit based on a state of a first interface element. The grounding circuit further includes one or more switching elements configured to selectively couple the backup power source to ground based on a state of a second interface element. The grounding circuit includes at least one circuit protection device coupled between the backup power source and the charging circuit. When the backup power source is coupled to the charging circuit and subsequently coupled to ground, the at least one circuit protection device is configured to decouple the backup power source from the charging circuit.

A floating electrical power generator having a three-dimensional (3D) flow passageway configured for increasing the water flow on the paddle wheel to increase the power output.

Provided is a pitch apparatus of a wind turbine. The wind turbine includes a wheel hub and multiple blades. The pitch apparatus includes a pitch bearing, a transmission element and a driving mechanism for driving the transmission element. The pitch bearing includes a bearing inner race and a bearing outer race. The bearing inner race is fixedly connected to the blade, the bearing outer race is fixedly connected to the wheel hub. The transmission element is driven by the driving mechanism, and drives the bade and the bearing inner race to rotate in relative to the wheel hub. A load level of ultimate bending moment for a blade root and a safety factor of the pitch apparatus increase, failure risks of the pitch bearing, bolts and the transmission belt are reduced. A wind turbine having pitch apparatus are provided.

Provided is a wind turbine including a hub and several blades rotatably attached to the hub by means of blade bearings including an inner ring coupled with the respective blade and an outer ring coupled with the hub, or vice versa, and rolling elements provided between the rings, wherein the outer ring or the inner ring has a cross section with a circumferentially varying thickness.

A fan wheel to be driven in only one rotational direction comprising a central drive unit. A hub positioned coaxially relative to the drive unit and comprising radial fan blades mounted in the hub. The fan blades engage at the base end of the hub between two drive tracks which are fixed relative to the drive unit and are arranged coaxially opposite one another in the direction of the axis of rotation of the fan wheel. The fan blades can be adjusted in terms of their blade angle, into opposing blowing directions, by being driven by a respective one of the drive tracks about their blade axis via a reversal plane which extends perpendicular to the plane of rotation of the fan wheel.