Nordex Energy Spain

A method including yawing a nacelle yaw system of at least one wind turbine for orienting a nacelle of the at least one wind turbine according to a first yaw setpoint when the at least one wind turbine operates in a first operating mode, the first yaw setpoint being at least based on a wind direction at a location of the at least one wind turbine or a wind farm comprising the at least one wind turbine. The method also includes yawing the nacelle yaw system for orienting the nacelle according to a second yaw setpoint when the at least one wind turbine operates in a second operating mode that precedes a non-operational period comprising unavailability for performing a yaw maneuver. Also, a data processing device or system, a control system, a wind turbine, a wind farm and a computer program.

A method for reducing vibrations of a wind turbine. The wind turbine comprises a wind rotor with at least a first rotor blade and a second rotor blade. The method comprises adjusting a pitch angle of at least one rotor blade of the first and second rotor blades so that the pitch angle of the first rotor blade and the pitch angle of the second rotor blade differ by at least 30 degrees, the adjusting of the pitch angle occurring when the wind turbine is in a state where yawing of the wind rotor is possible. And the method comprises adjusting a yaw angle of the wind rotor to a preferred yaw position, the yaw angle being at least partially adjusted during or after the adjusting of the pitch angle. Also, a data processing device or system, a control system, a wind turbine, a wind farm and a computer program.

A method for disassembling a tensioning system (320) from a bearing (200) of a wind turbine (100) is disclosed. The tensioning system (320) comprises an elongated, flexible tensioner (331), the tensioner (331) being wrapped around the bearing (200) and fixed by a retaining device (341). The method comprises: - cutting the tensioner (331) in a cutting region (521) of the tensioner (331), and - removing the tensioner (331) from the bearing (200). A system for disassembling a tensioning system is also disclosed.

A method for mounting a tensioning system (320) to a bearing (200) for a wind turbine (100) is disclosed. The method comprises: - fixing a first end region (371) of a tensioner (331) in a retaining device (341), - fixing a second end region (372) in the retaining device (341), - filling a first cap (391) with an anti-corrosion agent (560), - filling a second cap (392) with an anti-corrosion agent (560), - attaching the first cap (391) to the retaining device (341) such that it covers the first end (361), - attaching the second cap (392) to the retaining device (341) such that it covers the second end (362). A wind turbine is also disclosed.

A method comprises:- attaching a first guide (351) to a bearing (200),- introducing a first end region (371) of a first tensioner (331) into the first guide (351),- wrapping the first tensioner (331) around the bearing (200),- introducing the first end region (371) into a first retaining device (341),- introducing a second end region (372) of the first tensioner (331) into the first retaining device (341),- tensioning the first tensioner (331) by pulling on the first end (361) and/or second end (362),- fixing each of the first end region (371) and the second end region (372) to the first retaining device (341) under tension. A guide, a tensioning system and a wind turbine are also disclosed

The object of the invention is an adapter of a tower of a wind turbine that can provide additional stiffness in those parts of the adapter where there is a stress concentration, and a wind turbine comprising a tower which in turn comprises the adapter, and a method of erecting the tower.

Wind turbine assembly system and method configured to be used in handling of components during assembly, disassembly and/or servicing of wind turbines, the wind turbine comprising a tower (2). The assembly system comprising a lifting structure comprising: - a mast (1), and - a boom (4) configured to be joined to the mast (1). The assembly system being characterised in that it comprises a hoisting system comprising: o first guiding means (9.1) configured to be located in the mast (1) for hoisting of the mast (1), and o at least a hoisting cable (7) configured to be guided by the first guiding means (9.1) for hoisting the mast (1) from at least a horizontal position to a vertical position.

The object of the invention is an adapter of a tower of a wind turbine that does not need to have an area for allocating the anchor bolts for anchoring the concrete section to the adapter, and a wind turbine comprising a tower which in turn comprises the adapter.

The invention concerns a wind turbine rotor blade (110) comprising a half shell (134) with a spar cap (138) and a first shear web (140), wherein- the first shear web (140) is connected to the spar cap (138), which extends in a spanwise direction (120) of the wind turbine rotor blade (110) and has a center line (121),- the first shear web (140) has a first portion (140a) starting in a rotor blade root portion (114), and a subsequent second portion (140b),- the first portion (140a) is orientated at an angle (α) to the center line (121) such that - starting from the rotor blade root end (126) - a distance (154) of the first shear web (140) to the center line (121) of the spar cap (138) decreases along the first portion (140a).

The present invention relates to a reinforcement system for a tower of a wind turbine that avoids the appearance or propagation of cracks or openings in the surface of a concrete element of the tower of the wind turbine once the tower is subjected to post-tensioning forces, exerting a radial compression force to the concrete element, wherein the invention also relates to a tower of a wind turbine comprising at least one reinforcement system and to a method of reinforcing a tower of a wind turbine.