Abstract: Wind turbine tower with reinforcing elements. The wind turbine tower comprises at least a first section (1) comprising at least two segments (2) defining at least two vertical joints (3) disposed between the at least two segments (2), at least two reinforcing elements (4) placed in each vertical joint (3), and at least an upper region (5) disposed above at least a lower region (6). The reinforcing elements (4) are configured to provide a first shear strength (1ss) in the at least upper region (5) and a second shear strength (2ss) in the at least lower region (6), the first shear strength and the second shear strength having different values and being enough to bear a maximum expected shear force in the vertical joints (3).

Abstract: A wind turbine is disclosed which comprises a control system configured to execute at least one ice removal routine which comprises a heating stage of at least one of the blades (3), and a mechanical removal ice stage. A wind turbine removing ice method is also disclosed which comprises a stage wherein the presence of ice is detected on at least one of the blades and, once said presence of ice is detected, comprises a stage wherein at least one ice removal routine is activated which comprises, in turn, a heating stage of at least one of the blades and a mechanical removing ice stage on at least said blade.

Abstract: The present invention relates to a wind turbine assembly system which proposes an alternative to conventional cranes, having a main lifting structure configured to withstand the load of at least one tower section or at least one wind turbine component, and at least one secondary lifting structure configured to perform the lifting of the main lifting structure with respect to the wind turbine tower, in addition relating to a wind turbine assembly method according to the previous system, as well as the wind turbine assembled with the previous method.

Abstract: Method of reducing loads acting on a wind turbine yaw system in a wind turbine comprising a nacelle (2), a rotor which comprises at least one rotor blade (3) with a pitch control system and further comprising a yaw system that comprises the steps of detecting a yaw misalignment (?), enabling a yaw maneuver and performing a pitch control in order to reduce a yaw moment (Mz) acting on the wind turbine once the yaw misalignment (?) is detected and prior to enabling the yaw maneuver. Thus, when a yaw movement to reduce the yaw misalignment is commanded, the yaw moment (Mz) due to aerodynamic forces has been reduced by means of the pitch control and undesired yaw movements are prevented.

Abstract: The present invention relates to a manufacturing process in situ of concrete towers for wind turbines which enables executing a design of concrete tower manufactured in situ by means of climbing formwork, which reduces the execution time of the concrete tower, where the invention also relates to the associated concrete tower for wind turbine.

Abstract: A control system and control method of a wind farm allows taking into account dynamic variations in the possibilities of reactive power generation of each wind turbine with respect to maximum reactive power generation capacities. The system is configured to receive from at least one first wind turbine of the wind turbines of the wind farm a maximum reactive power limit desired lower than a minimum reactive power capacity required. The system is configured to calculate the individual reactive power setpoints for each of the at least two wind turbines of the wind farm such that the individual reactive power setpoint for the at least one first wind turbine of the wind farm does not exceed the maximum reactive power limit desired.

Abstract: A control system and control method of a wind farm which allows taking into account dynamic variations in the possibilities of reactive power generation of each wind turbine with respect to maximum reactive power generation capacities. The system calculates an initial torque and a maximum reactive power limit such that it is not necessary to apply limitations to the initial torque.

Abstract: A method of assembling a wind turbine tower by stacking a plurality of annular sections made of concrete above each other. The main connections are performed between two adjacent annular sections, for withstanding loads induced by a rotor. The auxiliary connections are performed between two adjacent annular sections, for withstanding loads induced by an earthquake and loads induced by the wind on the wind turbine in absence of the rotor, but not necessarily loads induced by the rotor. The method is characterized in that the auxiliary connections between two adjacent annular sections are performed prior to stacking the following annular section.

Abstract: A nacelle includes in turn a nacelle frame, and a yaw bearing having likewise/in turn at least a geared ring for providing a rotatable connection between the nacelle and the tower around a yaw axis. A method includes the steps of: a) disengaging the rotatable connection between the nacelle and the tower; b) lifting the nacelle from the tower by using lifting means, allowing the rotation of the geared ring; and c) rotating the geared ring around the yaw axis until the geared ring reaches a predetermined position with respect to the component to which the geared ring is connectable, either to the nacelle or the tower.

Abstract: Anchor cage for a foundation of a wind turbine. The anchor cage comprises at least an upper load distribution plate (1), at least a lower load distribution plate (2), and a plurality of first reinforcement elements (3) extending between said plates (1, 2). It further comprises at least one intermediate load distribution plate (4) placed between the upper load distribution plate (1) and the lower load distribution plate (2), and a plurality of second reinforcement elements (5) extending between the upper load distribution plate (1) and the intermediate load distribution plate (4), and being shorter than the first reinforcement elements (3). An assembly method for the anchor cage is also described. A foundation is also provided in which the total post-tensioning value provided in the upper part of the foundation (6) is different from the total post-tensioning value provided in the lower part of the foundation (7).

Abstract: The present invention relates to a pre-assembly slab system for concrete wind turbine towers, wherein the pre-assembly slabs can be transported to the vicinity of the tower of another wind turbine in the same wind farm or in another wind farm and be reused for the assembly of this other tower. The invention further relates to a method for assembling the pre-assembly slab system for concrete wind turbine towers.

Abstract: Wind turbine blade having at least one longitudinal hollow element that defines an aerodynamic outer surface and an inner cavity having an inner surface. The blade also comprises at least one spar (1), disposed in the inner cavity and bonded to the inner surface by at least two bonding surfaces (13) located on bonding surfaces (2) of the spar (1). The spar (1) comprises, on at least one bonding zone (2), at least three fibre fabric layers (3) and at least one central core (4) and at least one lateral core (5) disposed between the at least three fibre fabric layers (3). This makes it possible to increase the resistance to shear stresses in the adhesive bond of the spar (1) to the inner surface of the longitudinal hollow element and decrease the required amount of adhesive.

Abstract: A solution to optimally manage those requirements ensuring on the one hand, that the requirements set by the grid operators are appropriately and accurately accomplished at a point of interconnection (POI) and on the other hand, preventing the wind turbines from over fulfilling the requirements, for example, by remaining connected at voltages levels higher or lower than the ones required which, although possible, may cause higher loads and currents in the wind turbines than needed to fulfill the requirements.

Abstract: A solution to optimally manage those requirements ensuring on the one hand, that the requirements set by the grid operators are appropriately and accurately accomplished at a point of interconnection (POI) and on the other hand, preventing the wind turbines from over fulfilling the requirements, for example, by remaining connected at voltages levels higher or lower than the ones required which, although possible, may cause higher loads and currents in the wind turbines than needed to fulfill the requirements

Abstract: The present invention relates to a wind turbine control method that makes it possible to detect misalignments in said wind turbine with respect to the wind direction, wherein once these situations are detected, the control method of the present invention makes it possible to perform an automatic correction of the control parameters and to return the wind turbine to its optimal operating point, together with the associated wind turbine.

Abstract: The tool includes a first support element with: a first resting surface for allowing the tool to rest on the floor; a first support surface and a second support surface for respectively supporting on the same a first arm and a second arm of a first support of the subset that supports a low-speed shaft. Between the first support surface and the first resting surface is a first distance that is different from a second distance between the second support surface and the first resting surface. The difference in distances allows the low-speed shaft to be transported in a container according to an inclined orientation, with the maximum dimension thereof oriented according to the diagonal of the container, thereby simplifying the transport costs and logistics.

Abstract: Wind turbine tower with reinforcing elements. The wind turbine tower comprises at least a first section (1) comprising at least two segments (2) defining at least two vertical joints (3) disposed between the at least two segments (2), at least two reinforcing elements (4) placed in each vertical joint (3), and at least an upper region (5) disposed above at least a lower region (6). The reinforcing elements (4) are configured to provide a first shear strength (1ss) in the at least upper region (5) and a second shear strength (2ss) in the at least lower region (6), the first shear strength and the second shear strength having different values and being enough to bear a maximum expected shear force in the vertical joint s (3).

Abstract: The present invention relates to a wind turbine rotor balancing method which compensates imbalances between the centers of gravity of the wind turbine blades, in both magnitude and position along said blades, so that the amount of mass needed to carry out this balancing method is minimized, while reducing the loads and vibrations associated with a position of the center of gravity of the rotor not aligned with the axis of rotation thereof, wherein the invention further relates to the wind turbine rotor balancing system and the wind turbine balanced with the above method.

Abstract: It allows simplificating the assembling of a wind turbine (1). The dowels (4) comprise: a) an upper surface (5); b) a lower surface (6); c) an inner side surface (7); d) an outer side surface (8); e) at least an intermediate fixing surface (12), located in one of the outer (8) or inner (7) side surfaces, between the upper (5) and lower (6) surfaces; and f) at least a first grooved housing (13) made in that of the side surfaces (7, 8) comprising the intermediate fixing surface (12), where the first grooved housing (13) communicates the intermediate fixing surface (12) with one of the upper (5) and lower (6) surfaces and is configured to accommodate joining cables (23).

Abstract: The present invention relates to a pre-assembly slab system for concrete wind turbine towers, wherein the pre-assembly slabs can be transported to the vicinity of the tower of another wind turbine in the same wind farm or in another wind farm and be reused for the assembly of this other tower. The invention further relates to a method for assembling the pre-assembly slab system for concrete wind turbine towers.