A nacelle for a wind turbine is disclosed. The nacelle comprises a self-carrying rear structure (1) extending in a length direction (4) between a front end (6) defining an interface towards a hub mounted rotatably on the nacelle, and a rear end (7) arranged opposite to the front end (6), the nacelle defining an interface (15) towards a tower (14) of the wind turbine. The nacelle further comprises at least one pre-tensioned brace cable (8, 9) attached to the rear structure (1) at a first position (10) at or near the interface (15) towards the tower (14) along the length direction (4), at a second position (11) at or near the rear end (7) of the rear structure (1), and at at least one intermediate position (12) between the first position (10) and the second position (11) along the length direction (4). A direction defined by the pre-tensioned brace cable (8, 9) is changed at each intermediate position (12).

The invention relates to a wind turbine blade oscillation preventer comprising an aperture and a sleeve and having a peripheral extent and a longitudinal extent, the preventer being configured for removable application over a wind turbine blade and configured to extend longitudinally thereover and peripherally thereabout; the preventer having a non-aerodynamic exterior surface which exhibits a rough surface capable of disrupting smooth or laminar airflow over a substantial portion of the longitudinal and peripheral extent of the sleeve when the preventer is in place on a wind turbine blade. The preventer further comprises a smooth interior surface extending along a substantial portion of the longitudinal extent of the sleeve. The invention also relates to a method of application of a blade oscillation preventer over wind turbine blades which comprise serrations at a trailing edge thereof.

A system for adjusting environmental operating conditions associated with heat generating components located within a tower of a wind turbine may include a heat generating component located within an interior of the tower, a sensor configured to monitor a heat exchange parameter associated with the wind turbine and a split heat exchange system provided relative to the tower. The split heat exchange system may include a first heat exchanger located within the interior of the tower and a second heat exchanger located exterior to the tower. The system may also include a controller communicatively coupled to the sensor and the split heat exchange system. The controller may be configured to control the operation of the split heat exchange system based at least in part on the monitored heat exchange parameter to adjust an environmental operating condition associated with the heat generating component.

A flange connection system, including a pair of flange rings each including a neck portion and a radially extending flange portion. The radially extending flange portion includes a distal face including a contact surface that protrudes from a remainder of the distal face. The radially extending flange portion includes a plurality of circumferentially spaced bolt holes extending parallel to a center axis. The distal face including a first seal pocket radially inward of the contact surface and a second seal pocket radially outward of the contact surface, wherein in an assembled condition, the contact surface of the first flange ring is disposed against the contact surface of the second flange ring, a first seal ring is disposed in the first seal pockets, and a second seal ring is disposed in the second seal pockets.

The present disclosure is directed to a tower assembly of a wind turbine having a joint assembly configured therein. The tower assembly includes at least one generally cylindrical tower section. The tower section is split into at least a first vertical tower section and a second vertical tower section. Each of the first and second vertical tower sections define an interior wall and an exterior wall separated by a thickness. Further, the tower assembly includes a joint assembly that secures the first and second vertical tower sections together. The joint assembly includes a first L-flange mounted to the interior wall of the first vertical tower section and a second L-flange mounted to the interior wall of the second vertical tower section. The first L-flange faces in a first direction and the second L-flange faces away from the first direction. Further, the first and second L-flanges are separated from the interior walls of the first and second vertical tower sections via an open space.

A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor assembly, the nacelle comprising at least a first and a second nacelle module. The first nacelle module comprises a first frame structure and a main bearing system for a main shaft of the rotor assembly, and the second nacelle module comprises a second frame structure and a drive train system for the wind turbine. When the nacelle is mounted on the wind turbine tower, the main bearing system is supported by the wind turbine tower, and the drive train system is attached to the main bearing such that the weight of the drive train system is transferred to the main bearing system and thereby to the wind turbine tower. Further, the first frame structure is configured to support the main bearing system during transportation and prior to mounting of the nacelle, and the second frame structure is configured to support the drive train system during transportation and prior to mounting of the nacelle, and the first and second frame structures form a load carrying structure of a first and a second shipping freight container such that the first and second nacelle module can be transported as shipping freight containers. When the nacelle is mounted on the wind turbine tower, the first and second frame structures may be placed side by side in a direction along a rotational axis of the wind turbine rotor and may be oriented such as to have a length extending transversely to a rotational axis of the wind turbine rotor.

Methods for assessing the useful life that may remain for a portion of a wind turbine support structure. The methods may include identifying an overall expected useful life for the portion of the support structure and estimating an expended life from the extent of loading that has occurred to the portion of the support structure during the operative life of a wind turbine. The useful life remaining for the portion may be determined by subtracting the expended life from the overall expected useful life.

A segment for a Scruton helix includes: a segment body, a coupling device on the segment body for coupling the segment to a further segment for the Scruton helix, a push-on device on the segment body for coupling the segment to a rope. Also disclosed are a system for a Scruton helix, a Scruton helix, a tower for a wind turbine, and a method for mounting a Scruton helix.

A monitoring system (100) monitors displacement of a wind turbine tower and includes at least one plumb bob with an upper part and a lower part, each plumb bob being configured to be pivotally suspended at its upper part, via a suspension device, from a point above so as to attain a rest position in a rest situation, and each said plumb bob has one or more sensing surfaces (12, 12′). One or more suspension devices means (10) suspend the at least one plumb bob. Two or more sensors (14, 14′, 14″), each being configured to sense, in a specific sensing direction (16, 16′, 16″), a distance to a plumb bob, provide displacement data. At least two of the two or more sensors (14, 14′, 14″) are arranged in a sensing vicinity of a plumb bob, with at least two of the specific sensing directions (16, 16′, 16″) not being parallel to each other. The monitoring system includes a control unit (18) configured to receive the displacement data from two or more of the sensors, and a device for reporting, to an external unit (20), parameter(s) representing displacement of a wind turbine tower.

An assembly includes a first block including a first end; and a second block assembled with the first block at a same height as the first block, the second block including a second end facing the first end of the first block. The first block and the second block are connected to the assembly such that there is no structural connection between the second end of the second block facing the first end of the first block.