Abstract: Method of repairing a winding in a generator, the generator having a generator rotor and a generator stator, wherein the generator rotor and/or stator comprises a plurality of windings, the windings comprising a stack of turns of a conductor around a tooth, wherein the method comprises cutting the winding on a side of the tooth to separate the winding in two parts; removing the two parts of the winding from the tooth; sliding a substitute partial coil on the tooth, the substitute partial coil comprising a stack of incomplete conductor turns having a first end and a second end, said first and second end positioned on the same side of the tooth; and connecting the second ends of each incomplete turn with a first end of the next incomplete turn using a plurality of conductor portions. The disclosure further relates to a kit for making a substitute coil.

Abstract: A tower section for a wind turbine tower structure comprises at least two shell segments defining, in an assembled condition, a substantially hollow structure, and including first connecting means for mutually joining two adjacent shell segments along a joint, which comprise a column of concrete arranged overlapping at least part of the joint between adjacent shell segments. A method for building a tower section for a wind turbine tower structure and a wind turbine comprising a nacelle having rotatable blades and a vertical tower made of at least one of such tower sections are further provided.

Abstract: A blade for a wind turbine comprising a blade root portion for attachment to a mounting flange of the wind turbine, the blade root comprising a plurality of first holes provided with an internal bushing wherein the bushings comprise a first end at or near a mounting surface of the blade root and an opposite second end embedded in their corresponding first holes, and wherein one or more internal bushing being guiding bushings, the guiding bushings comprising a first end that is adapted to guide the blade root with respect to a mounting flange.

Abstract: A blade for a wind turbine comprising a blade root portion, the blade root portion defining an annular mounting surface for coupling to a hub or extender of the wind turbine and comprising a plurality of first holes provided with an internal bushing, wherein at least one first internal bushing comprises at least one first securing member, and at least one second internal bushing comprises at least one second securing member, the first and second bushings being located in or near substantially opposite positions of the annular mounting surface, and wherein said first and second securing members are adapted to receive connecting means for connecting the first securing member with the second securing member.

Abstract: Anti-ovalization tool for introduction into a wind turbine blade root comprising two or more rigid bodies connected to one another along their side edges with distances in between them and together forming a substantially cylindrical body, wherein the distances between the rigid bodies are adjustable. The invention is further related to the method of reducing ovalization of a wind turbine blade root and to the use of a tool comprising two or more rigid bodies as an anti-ovalization tool.

Abstract: A method of calibrating one or more load sensors of a blade of a wind turbine, said wind turbine comprising a main generator, a power electronic converter connected with the main generator, and a rotor operationally connected with the main generator and carrying the blade. The method comprises acting on the power electronic converter to operate the main generator as motor to set the blade in at least one predetermined condition. The method further comprises measuring loads in the predetermined condition using the load sensors of the blade and calibrating the blade load sensors taking into account the measured loads.

Abstract: Reference bores are selected in blade extender and one or more reference plates are provided at a height (h1; h2) from extender flange. A reference laser device is provided within reference bores which beam impinging on reference plates is in line with bore axis. A blade root bore is selected and a laser device is fitted therein such that a measuring laser beam impinging on plates is in line with axis of blade root bore. The measuring laser beam can be then assessed. A measuring tool is used having a first end to which laser devices can be attached or other devices such as a comparator, and a movable second end for being inserted within the corresponding bores with a tight fit.

Abstract: A direct drive wind turbine comprising a rotor and a generator, the rotor comprising a hub and a plurality of blades and being rotatably mounted on a frame, and the generator comprising a generator rotor and a generator stator, further comprising one or more dampers arranged between the rotor and the generator rotor and extending at least partially in an axial direction.

Abstract: It comprises a main wind turbine frame and at least one housing member defining an interior where parts of the wind turbine are received. The housing members are arranged at a lateral portion of the main frame such that their interior is separated from the main frame. The housing members comprise releasable hinge means to the main frame allowing the housing member to be opened for accessing the interior. Limiting means for restricting an opening angular movement of the housing member are provided.

Abstract: A wind turbine is described. The turbine includes a hub with one or more blades that rotatably mounted on a frame and operatively coupled to a shaft. The shaft is provided at least partially internally to the frame, and a center piece from which a plurality of spokes extends substantially radially is mounted on the shaft. The hub is provided with a plurality of circumferentially arranged axial protrusions. Flexible elements are arranged to connect the spokes to the protrusions.

Abstract: A wind turbine that includes a rotor and a generator is described. The rotor includes a rotor hub that is rotatably mounted on a frame and one or more rotor blades. The generator includes a generator stator and a generator rotor with a carrying structure that carries magnetic or electromagnetic elements. One or more circumferentially arranged substantially axial protrusions that extend into the generator rotor carrying structure are attached to the rotor. Flexible couplings are arranged between one or more of the axial protrusions and the carrying structure.

Abstract: An auxiliary drive system for driving a wind turbine component is described. The drive system includes a motor, gearing operationally connected with the motor, and an actuator operationally connected with the gearing for actuating the wind turbine component. The auxiliary drive system is provided with one or more locks. The one or more locks are able to interlock with a component of the gearing to lock the auxiliary drive system.

Abstract: A wind turbine that includes a rotor, a generator, and a tower is described. The rotor includes a rotor hub and one or more rotor blades. The generator includes a generator stator and a generator rotor. The rotor hub is rotatably mounted on a frame and the generator and tower are arranged on the same side of the rotor. The generator stator is attached to the frame substantially in a plane perpendicular to the rotor's rotational axis, and the generator rotor is rotatably mounted on a part of the generator stator.

Abstract: A tower section for a wind turbine tower structure comprises at least two shell segments defining, in an assembled condition, a substantially hollow structure, and including first connecting means for mutually joining two adjacent shell segments along a joint, which comprise a column of concrete arranged overlapping at least part of the joint between adjacent shell segments. A method for building a tower section for a wind turbine tower structure and a wind turbine comprising a nacelle having rotatable blades and a vertical tower made of at least one of such tower sections are further provided.

Abstract: A wind turbine that includes a hub carrying one or more blades, a generator, and a shaft operatively coupled to the hub through a first coupling is described. In operation, the rotor of the generator is directly driven by the shaft. The hub is rotatably mounted on a frame, and the shaft is mounted at least partially internally in the frame. The coupling between the shaft and the hub is adapted to transmit the torque about the hub's rotational axis from the hub to the shaft while substantially limiting the transmission of other loads. The generator is arranged in such a way that the torque about the shaft's rotational axis is transmitted from the shaft to the rotor of the generator while substantially limiting the transmission of other loads from the shaft to the generator.

Abstract: The invention relates to a wind turbine comprising a substantially tubular tower structure and one or more vibration damping systems. At least one of the one or more vibration damping systems include a plurality of bracing elements and a damping element. One of the bracing elements is connected to the tower structure. The bracing elements and damping element are linked in such a way that a local displacement of the tower structure causes an increased displacement of the damper along its longitudinal axis. The invention further provides a method of damping vibrations in a wind turbine tower using one or more toggle-brace vibration damping systems and a using a toggle-brace vibration damping system for damping vibrations in a wind turbine.

Abstract: A wind turbine is described. The turbine includes a hub with one or more blades. The hub is rotatably mounted on a frame and operatively coupled to a shaft through a coupling plate mounted on the shaft. The shaft is provided at least partially internally to the frame, and the shaft is a substantially tubular hollow shaft.

Abstract: A wind turbine comprising a hub carrying one or more blades, a frame, and a planetary gearing for transmitting the torque of the hub, the hub being rotatably mounted upon the frame at or near a distal end thereof, wherein the torque of the hub is introduced into the planetary gearing through a planet carrier of the gearing, the planet carrier being located at or near the distal end of said frame.

Abstract: A wind turbine lubrication system comprising a pump for pumping lubricant through a lubrication circuit, said pump being driven by a power-take-off from the drive train of the wind turbine, characterised in that said pump for pumping lubricant drives at least a first hydraulic motor providing mechanical power to a first wind turbine auxiliary component.

Abstract: The invention relates to a method of aligning a wind turbine component with a wind turbine rotor hub, comprising providing the component with a support comprising at least one adjustable element and adjusting said at least one element to align the wind turbine component. The invention further relates to a system for aligning a wind turbine component with a wind turbine rotor hub comprising a support with at least one adjustable element supporting said wind turbine component, such that said wind turbine component can be aligned by adjusting said at least one element.