Nordex Energy Spain

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.

A present disclosure refers to a hub (1) for a rotor (110) of a wind turbine (100), comprising a hub body (2) with a first flange (3) configured for attaching the hub body to a rotor shaft of the wind turbine and with at least one second flange (5) configured for supporting a rotor blade, the at least one second flange defining a second flange area (6) of the hub body, further comprising at least two stiffening elements (7) extending within at least a portion of the second flange area each stiffening element adjoining the hub body at at least two joints (8), wherein each stiffening element extends in a length direction with reference to an extension direction (S-S) of the rotor shaft.

The present disclosure concerns a hub (1) for a rotor of a wind turbine, comprising a hub body (2), comprising a first flange (4), and at least one second flange (5) configured for supporting a rotor blade, the at least one second flange defining a second flange area (6) of the hub body. The hub further comprises a stiffening element (7) extending within at least a portion of the second flange area, wherein a thickness of the stiffening element in a direction perpendicular to the extension is constant at least over a defined extent.

The present disclosure concerns a hub (1) for a rotor of a wind turbine, comprising a hub body (2), comprising a first flange (3), and at least one second flange (5) configured for supporting a rotor blade, the at least one second flange defining a second flange area (6) of the hub body. The hub body further comprises a stiffening element (7) extending within at least a portion of the second flange area, wherein a cross section of the stiffening element comprises a center portion (lla) with a constant thickness along a width direction and at least one edge portion (llb) configured with a variable thickness along the width direction.

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The present invention relates to a system for manufacturing an adaptable precast foundation structure for a wind turbine that is configured taking into account the wind turbine loads and soil conditions allowing that a large part of the foundation structure is homogenized, despite the fact that the transition structure being manufactured with the system is dependent of the type of soil and that the size of said transition structure varies depending on the soil, making it easily adaptable to the geotechnical conditions of each wind turbine position of the windfarm which allows a significant reduction in time and cost. The invention also relates to a method for manufacturing an adaptable precast foundation structure for a wind turbine and to a wind turbine manufactured with said method. The invention also relates to a system for manufacturing a precast foundation structure for a wind turbine and related method and precast foundation structure.

A method for operating a wind turbine (1) for reducing a risk of wind turbine overloading in the presence of a wind gust event is provided, the method comprising the steps: - providing first information (II) which is representative of a rate of change of a first wind turbine parameter (P1) comprising at least one of a first wind turbine loading parameter and a first wind turbine operating parameter over time, wherein each of the first wind turbine loading parameter and the first wind turbine operating parameter depends on a wind speed at the location of the wind turbine (1), - determining an adjustable first threshold (T1) considering the first information (I1), - comparing, in a first comparison step, the first information (II) to the first threshold (T1) and generating a first trigger signal (TS1) in case the first information (II) exceeds the first threshold (T1), - generating a control action (CA) intended to reduce the risk of wind turbine overloading caused by the wind gust event in case an action trigger (AT) is generated, wherein the generation of the action trigger (AT) requires that at least the first trigger signal (TS1) is generated. Furthermore, a wind turbine (1) with a control system (10) is provided.

The present invention relates to a wind turbine rotor blade spacer, a transportation and storage system for wind turbine rotor blades and a related method that prevent the vertical flexion of each one of the blades assemblies, minimizing the stresses and avoiding the contact between vertically and/or horizontally adjacent blades, and in consequence, blade damage. Also, the overall occupied surface by the system once assembled is minimised.

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