Nordex Energy Spain Patente

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.

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.

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.

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.

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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The present invention relates to a post- tensioning system for a tower of a wind turbine that manages the quasi-permanent loads on the tower to counter them, reducing their impact and making it possible to decrease the required amount of overall post-tension force in the tower of the wind turbine, also to a post-tensioned tower of a wind turbine comprising the post-tensioning system and to the method of post-tensioning a tower of a wind turbine.

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The object of the invention is a wind turbine tower which reinforces the upper part of the section of the tower of the wind turbine, wherein the tower comprises- at least one first tower section;- an adapter disposed between the at least one first tower section and at least one second tower section or a wind turbine component,wherein the at least one first tower section is a concrete tower section comprising an upper flange comprising an external diameter; andwherein the adapter comprises:- a lower flange configured to join the adapter to the at least one first tower section;wherein the lower flange of the adapter comprises an external diameter.

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The present invention can be included in the technical field of the wind turbine assembly systems, wherein the wind turbine assembly system of the present invention proposes an alternative to assembly systems using climbing cranes that install the tower sections sequentially as they climb on the previous section already in place, being an additional object of the invention an assembly method for a wind turbine.

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The disclosure refers to a computer-implemented method for heating up electrolytic units. The method comprises determining whether some electrolytic units of an electrolysis plant require heating up to have them at a temperature within a predetermined range in a future time span; controlling the electrolytic units to power them up based on first electric power available in a current time span; heating up the electrolytic units to have them at the temperature within the predetermined range in the at least one future time span; and repeating the steps such that the heating up is determined for one or more time spans that occur at the same time and/or later than the future time span, thereby repeatedly controlling the temperature of the electrolytic units to be at a temperature within the predetermined range in the future time spans.

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