A pitch controlled wind turbine has a tower, a nacelle mounted on the tower, a hub mounted rotatably on the nacelle, and at least three blades. The wind turbine includes at least three blade connecting members, each blade connecting member extending between neighbouring wind turbine blades. The wind turbine has at least three pretension members, each being connected to one of the blade connecting members and to the hub via a tensioning device, the tensioning device provides radial movement of a radially inward end of the pre-tension member with respect to an axis of rotation of the hub due to extension/retraction of the tensioning device, each pre-tension member thereby providing pre-tension in the blade connecting member to which it is connected. An anti-icing system and/or a de-icing system is provided for protecting one or more of the blade connecting members, the pre-tension members, the connection points, or the tensioning devices.
A pitch controlled wind turbine has a tower, a nacelle mounted on the tower, a hub mounted rotatably on the nacelle, and at least three blades. The wind turbine includes at least three blade connecting members, each blade connecting member extending between neighbouring wind turbine blades. The wind turbine has at least three pre- tension members, each being connected to one of the blade connecting members and to the hub via a tensioning device. The tensioning device is configured to provide pre- tension in the blade connecting member to which it is connected. An anti-icing system and/or a de-icing system is provided that includes one or more heating elements for protecting one or more of the blades. One or more electrical power source paths for the anti-icing system or de-icing system are routed between the hub and the heating element along at least one of the blade connecting members and pre-tension members.
A pitch controlled wind turbine has a tower, a nacelle mounted on the tower, a hub mounted rotatably on the nacelle, and at least three blades. The wind turbine includes at least three blade connecting members, each blade connecting member extending between neighbouring blades. The wind turbine has at least three pre-tension members, each connected to one of the blade connecting members and to the hub via a tensioning device, the tensioning device provides radial movement of the pre-tension member due to extension/retraction of the tensioning device, each pre-tension member thereby providing pre-tension in the blade connecting member to which it is connected. A de-icing system is coupled to one or more of the tensioning devices and configured to control the one or more tensioning devices to extend or retract to excite at least some of the wind turbine blades, blade connecting members and/or pre-tension members to displace ice therefrom.
A method for handling a wind turbine component (26) is provided. The method includes providing a lifting yoke (38) having a yoke frame (40) and connecting the yoke frame (40) to the wind turbine component (26). The method further includes providing a first crane (24, 36) and attaching the first crane (24, 36) to a first crane interface (44, 46) on the lifting yoke (38). The wind turbine component (26) is suspended in the air by the first crane (24, 36). The method further includes providing a second crane (36, 24) and attaching the second crane (36, 24) to a second crane interface (46, 44) on the lifting yoke (38). Support of the wind turbine component (26) transitions from the first crane (24, 36) to the second crane (36, 24) while the wind turbine component (26) is suspended in the air. Transitioning support of the wind turbine component (26) includes moving the first crane interface (44, 46) and second crane interface (46, 44). A lifting yoke (38) for handling a wind turbine component (26) using a first crane (24, 36) and a second crane (36, 24) is also provided.
B66C 1/10 - Éléments ou dispositifs de prise de la charge adjoints aux mécanismes de levage, de descente ou de halage, ou adaptés pour être utilisés avec ces mécanismes et transmettant les efforts à des articles ou à des groupes d'articles par moyens mécaniques
F03D 13/10 - Assemblage de mécanismes moteurs à ventDispositions pour l’érection de mécanismes moteurs à vent
B66C 13/08 - Dispositifs auxiliaires pour commander les mouvements des charges suspendues ou pour empêcher le câble de prendre du mou pour déposer les charges selon un orientement ou dans une position donnés
B66C 23/00 - Installations comportant essentiellement un palonnier, une flèche ou une structure triangulaire agissant comme bras de levier, montées de façon à permettre des mouvements de translation ou d'orientation dans des plans verticaux ou horizontaux, ou bien une combinaison de ces mouvements, p. ex. grues à flèche, derricks ou grues sur tours
In a first example there is provided a method of servicing a wind turbine rotor blade. The blade comprises an outer shell defining an interior cavity, and the rotor blade is part of a rotor connected to a wind turbine. The method comprises arranging the rotor such that the 5 blade is in a first orientation, installing a work platform in the interior cavity of the blade when the blade is in the first orientation, and subsequently arranging the blade in a second orientation. The method further comprises using the work platform, when the blade is in the second orientation, to support a technician performing a service operation on the blade.
Actions performed by the user with regard to the renewable power generating system are logged and compared to a set of predefined actions defined as permissible for the user by a set of access rights. In the case that the comparison reveals discrepancies between the performed actions and the set of predefined actions related to the set of access rights, the set of access rights assigned to the user is automatically adjusted, by removing at least some access rights related to predefined actions not being performed. In one aspect, this may ensure that users are permitted to perform necessary actions while efficiently avoiding overprivileged users.
A wind turbine comprising a nacelle assembly mounted on top of a tower, wherein the nacelle assembly includes a hoisting system. The hoisting system comprises a pedestal to which a lifting boom is attached, the lifting boom configured to deploy a lifting cable, and a counterbalance mast that is connected by a ballast line to a ground-based ballast. A benefit of the arrangement is that load capacity of the nacelle-base hoisting system can be increased significantly with the addition of the ground-based ballast, without the need for a ballast to be positioned permanently at the level of the hoisting system. A method of configuring a wind turbine structure is also provided.
F03D 13/10 - Assemblage de mécanismes moteurs à ventDispositions pour l’érection de mécanismes moteurs à vent
B66C 23/20 - Installations comportant essentiellement un palonnier, une flèche ou une structure triangulaire agissant comme bras de levier, montées de façon à permettre des mouvements de translation ou d'orientation dans des plans verticaux ou horizontaux, ou bien une combinaison de ces mouvements, p. ex. grues à flèche, derricks ou grues sur tours spécialement adaptées pour être utilisées dans des emplacements particuliers ou à des usages particuliers avec couples d'appui assurés par des murs de bâtiments ou de constructions similaires
8.
HYDROGEN ELECTROLYSER SYSTEM BASED ON A WIND TURBINE GENERATOR
A hydrogen generation system comprising a wind turbine rotor coupled to a generator, wherein the generator is electrically coupled to a DC-link by way of a primary power converter, the DC-link having a power dissipation element. The system also comprises a hydrogen electrolysis system coupled to the DC-link; an auxiliary power converter coupled to the DC-link; and one or more auxiliary loads. A control system controls the voltage on the DC-link to remain with a predetermined range. In one aspect, the system provides power to at least the auxiliary loads, in such a way as to manage the generation of hydrogen by the electrolyser whilst decoupling the performance of the electrolyser from varying wind conditions.
C25B 9/65 - Dispositifs pour l'alimentation en courantConnexions d'électrodesConnexions électriques intercellulaires
C25B 1/042 - Hydrogène ou oxygène par électrolyse de l'eau par électrolyse de la vapeur
C25B 15/023 - Mesure, analyse ou test pendant la production électrolytique
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 9/25 - Mécanismes moteurs à vent caractérisés par l’appareil entrainé l’appareil étant un générateur électrique
The invention provides a method for handling a blade (11) of a horizontal axis wind turbine (1), wherein the wind turbine comprises a tower (14), a nacelle (15) mounted on the tower, and a rotor hub (18) mounted to the nacelle, wherein the blade is elongated and extends from a blade root (111) to a blade tip (112), wherein, when the blade is mounted to the hub, a circular blade mounting flange (182) of the hub is in contact with the blade root (111), the method comprising - arranging a plurality of blade guide devices (411-414) so as to be fixed in relation to the hub (18), and distributed in a circumferential direction of the blade mounting flange (182), and so that contacts are provided between the blade (11) and contact devices (4105) of the blade guide devices (411-414), which contacts are provided at the blade root (111), - engaging a blade supporting arrangement (301) with the blade (11), - supporting the blade (11) by means of the engaged blade supporting arrangement (301), - driving at least one of the contact devices (4105) which are in contact with the blade so as to move the supported blade towards or away from the blade mounting flange (182).
The invention provides a method for handling a blade (11) of a horizontal axis wind turbine (1), wherein the wind turbine comprises a tower (14), a nacelle (15) mounted on the tower, and a rotor hub (18) mounted to the nacelle, wherein the blade is elongated and extends from a blade root (111) to a blade tip (112), wherein, when the blade is mounted to the hub, a circular blade mounting flange (182) of the hub is in contact with the blade root (111), the method comprising a blade mounting procedure comprising - fixing in relation to the hub (18) a plurality of blade guide devices (411-414) so as to be distributed in a circumferential direction of the blade mounting flange (182), each blade guiding device protruding in a direction away from the hub (18) and in a non-zero angle to a plane formed by the mounting flange, - engaging a blade supporting arrangement (301) with the blade (11), - supporting the blade (11) by means of the engaged blade supporting arrangement (301), - providing contact between contact surfaces (4101) of the fixed blade guide devices (411-414) and the supported blade (11), at the blade root (111), and - moving, with the contact surfaces (4101) of the blade guide devices (411-414) in contact with the supported blade (11), at least one of the contact surfaces in a radial direction of the blade mounting flange (182).
The disclosure relates to a method, as well as a related wind turbine and computer program product, for use with a wind turbine comprising a wind turbine controller. The method comprises determining the wind turbine to be in a first operational state, and operating a control system of the wind turbine using the wind turbine controller. The method further comprises determining the wind turbine to be in a second operational state, and operating the control system using an auxiliary controller. Operating the control system using the auxiliary controller comprises receiving a first control signal for the control system from the wind turbine controller, transmitting a feedback signal to the wind turbine controller in accordance with the first control signal, and transmitting a second control signal to the control system as a substitute for the first control signal.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
12.
STABILIZED WIND TURBINES, SYSTEMS FOR STABILIZING WIND TURBINES, AND METHODS FOR INSTALLING SAME
A wind turbine (10) supported by a plurality of cables (20). The wind turbine (10) includes a tower (12). An energy generating unit (14) is disposed on the tower (12) and is configured to produce electrical energy from wind (40). The tower (12) includes an upper section and a lower section. Each of the upper and lower sections includes an inwardly directed flange (82, 90) having a plurality of through-bores (84, 92, 96). An annular member (62, 120) has one or more ears (50, 204) that extend outwardly. Each ear (50, 204) is configured to be coupled to one of the plurality of cables (20). The annular member (62) includes a plurality of bores (68, 72, 104) that align with the through-bores (84, 92, 96) in the inwardly directed flanges (82, 90). The bores (68, 72) each includes a screw thread (100, 102). Threaded fasteners (94) are used to secure the annular member (62, 120) to the tower (12). A method of installing includes tensioning cables (20) after installing the interface module (18, 120) on the tower (12) and before installing the energy generating unit (14).
A method for deterring airborne animals to prevent collision between the airborne animal and a wind turbine. The method comprises providing data (PD) from at least one data source regarding at least one parameter relevant for an airspace of 5 the wind turbine. Next, analyzing said data (AD) according to an algorithm to determine presence of any one or more airborne animals in the airspace. In case it is determined that airborne animals are present, then changing (C_O) one or more parameters of operation of a rotor of the wind turbine, so as to cause the wind turbine to invoke an air pressure and/or wind velocity variation at a distance 10 of the wind turbine, e.g. upstream of downstream of the wind turbine, to deter the airborne animal from approaching the wind turbine. This may be a static increase or decrease in air pressure and/or wind velocity, or an increase in audible noise generated by the wind turbine, e.g. caused by pitching rotor blade(s) to generate more aerodynamic noise. Finally, returning (RNO) to a normal mode of 15 operation of the wind turbine after having caused the wind turbine to invoke the air pressure and/or wind velocity variation.
A method for preventing collision between airborne animals, e.g. birds or bats, and a windfarm with a plurality of wind turbines. The method comprises receiving data (RD) regarding an airspace of the windfarm, determining (D_B) if one or 5 more airborne animals are approaching the windfarm in response to said data, estimating (EFP) a flight path of the approaching airborne animals, such as flight height and/or horizontal flight path in relation to the windfarm, in case it is determined that airborne animals are approaching the windfarm. Further, determining (CPS) a collision preventing strategy in response to said estimated 10 flight path, and controlling operation (C_O) of one or more of the plurality of wind turbines of the windfarm according to the determined collision preventing strategy as a measure of preventing collision between the airborne animals and the wind turbines. Finally, returning (RNO) to a normal operation of the one or more wind turbines. The wind turbines can e.g. be controlled to generate extra noise, e.g. by 15 blade pitching, yawing, increasing rotor speed, or a combination of these. Curtailment or a complete stop may be used for some wind turbines to generate a safe flight path for the animal(s).
The invention provides a bolt and spacer assembly - comprising a bolt (2) comprising a head (201) and an elongated bolt body (202), the bolt body being terminated at a penetration end (203) located at a distance from the head, - which bolt body (202) is adapted to penetrate a first hole (1411) in a first wind turbine tower section (141), and to penetrate a second hole in a second wind turbine tower section (142) for a bolted connection of the wind turbine tower sections, - wherein the bolt and spacer assembly further comprises a spacer (3) adapted to assume, when the penetration end is inserted into the first hole and the head is above the penetration end, a spacing position in which the spacer by contact with the head and the first wind turbine tower section keeps the head and the first wind turbine tower section apart, - wherein the spacer presents, in the spacing position and as seen along a longitudinal direction of the bolt body, an open profile such that an opening is formed between ends (301E, 302E) of the profile so that the spacer (3) partly surrounds the bolt body (202). - The spacer is adapted to be turned from the spacing position around a turning axis (TA) which is transverse to the longitudinal direction of the bolt body so that at least a part of the bolt body is moved out through the opening formed between the ends (301E, 302E) of the spacer profile, so as to allow the bolt body to further enter the first hole as the bolt moves under the influence of gravity acting on the bolt, and - the spacer is adapted to contact the bolt (2) so as to dampen the move of the bolt as the bolt moves upon said turning of the spacer.
A method of operating an off-grid microgrid (8), the microgrid (8) comprising at least one wind turbine (12), a conversion device (18) configured to produce fluid fuel from electrical power generated by the at least one wind turbine (12), and an energy storage device (16) The 5 method comprises operating the energy storage device (16) in an isochronous mode to absorb active power imbalances in the microgrid (10).
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie
H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
H02J 3/48 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs contrôlant la répartition de la composante en phase
The present disclosure relates to a transporter for transporting a wind turbine blade which is 5 configured to account for bending and torsional stresses which may be applied to the blade during transportation by allowing for rotation of the turbine blade about three perpendicular axes.
A composite element (6), e.g. a wind turbine blade, comprising a stack (20) of at least two fibre mats (13) of oriented fibres (18) embedded in a matrix of cured acid breakable resin (14) is disclosed. The fibres (18) of each fibre mat (13) are fixated relative to each other by means of first fixation means (19) made from a first material, and the at least two fibre mats (13) are fixated relative to each other by means of second fixation means (16) made from a second material. The second material of the second fixation means (16) is an acid breakable material. The composite element (6) is highly recyclable by exposing the composite element (6) to an acid containing release agent (11). Furthermore, a method for manufacturing such a composite element (6) and a method for disassembling such a composite element (6) are disclosed.
B29C 70/22 - Façonnage de matières composites, c.-à-d. de matières plastiques comprenant des renforcements, des matières de remplissage ou des parties préformées, p. ex. des inserts comprenant uniquement des renforcements, p. ex. matières plastiques auto-renforçantes des renforcements fibreux uniquement caractérisées par la structure des renforcements fibreux utilisant des fibres de grande longueur, ou des fibres continues orientées dans au moins deux directions formant une structure bidimensionnelle
B29C 70/24 - Façonnage de matières composites, c.-à-d. de matières plastiques comprenant des renforcements, des matières de remplissage ou des parties préformées, p. ex. des inserts comprenant uniquement des renforcements, p. ex. matières plastiques auto-renforçantes des renforcements fibreux uniquement caractérisées par la structure des renforcements fibreux utilisant des fibres de grande longueur, ou des fibres continues orientées dans au moins trois directions formant une structure tridimensionnelle
B29C 70/54 - Parties constitutives, détails ou accessoiresOpérations auxiliaires
B29B 17/02 - Séparation de matières plastiques des autres matières
B29D 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
B29K 105/08 - Présentation, forme ou état de la matière moulée contenant des agents de renforcement, charges ou inserts de grande longueur, p. ex. ficelles, mèches, mats, tissus ou fils
B29L 31/08 - Pales pour rotors, stators, ventilateurs, turbines ou dispositifs analogues, p. ex. hélices
A method of wake steering a first wind turbine. A second wind turbine is positioned downstream of the first wind turbine so that the second wind turbine can be affected by a wake of the first wind turbine. A yaw offset signal is applied to a yaw control system of the first wind turbine, the yaw offset signal causing the yaw control system to create a yaw offset between a rotor of the first wind turbine and a wind direction, the yaw offset steering the wake away from the second wind turbine. A yaw offset controller is operated to vary the yaw offset signal in response to changes in the wind direction. In response to the detection of the wind direction crossing the full-wake wind direction a timing system is started and the operation of the yaw offset controller is held so that the yaw offset signal does not vary in response to changes in the wind direction. The operation of the yaw offset controller is reinstated in response to either: a timeout of the timing system, or detection of the wind direction re-crossing the full-wake wind direction before timeout of the timing system.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
The invention relates to adjusting individual pitch of wind turbine rotor blades. The invention involves receiving a sensor signal indicative of wind turbine tower acceleration, and determining a frequency signal in a fixed coordinate frame of the wind turbine, including 3P frequency content and tower natural frequency content. The invention involves generating a pair of mutually orthogonal signals in the fixed coordinate frame, which includes filtering to retain content corresponding to 2P cyclic pitch and tower natural frequency minus 1P cyclic pitch. The invention involves applying a control action to the orthogonal signals to obtain control signals for mitigating target frequency content in the tower, and applying an inverse m-blade coordinate transformation to the control signals to obtain individual pitch reference offset values for the respective rotor blades. The pitch of the rotor blades is adjusted based on the obtained individual pitch reference offset values.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
Operating a renewable energy power includes receiving a measurement signal indicative of a measured power characteristic of the plant at a point of connection to a power network; controlling the plant 12) according to a normal mode of operation to provide power by determining and dispatching power set points, the power set points being determined by: acquiring samples of the measurement signal at a sample rate; and determining the power set points based on the sampled measurements and a target level for the measured power characteristic; and monitoring the measurement signal to detect an undersampled oscillation of the measured power characteristic in the sampled measurements, and thereby detecting a control fault; and then controlling the plant according to a fault mode of operation.
A wind turbine (1) comprising a tower (2), a nacelle and a hub (4) carrying two or more wind turbine blades (5) is disclosed The wind turbine (1) further comprises an anti-swaying system arranged at an up-tower position of the wind turbine (1), the anti-swaying system comprising at least one air thruster (6) configured to produce an accelerated airflow (10) being adjustable in direction and magnitude. Furthermore, a method for reducing swaying of a wind turbine (1) by operating at least one air thruster (6) is disclosed.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 13/20 - Dispositions pour monter ou supporter des mécanismes moteurs à ventPylônes ou tours pour des mécanismes moteurs à vent
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
23.
GRID FORMING CONTROL IN A POWER SYSTEM COMPRISING A HYDROGEN ELECTROLYZER STACK
According to the invention it is provided a method for controlling a grid connected power converter having a DC side with a DC link and an AC grid side, and being configured to control power supply to a hydrogen electrolyzer stack. The power supply to the hydrogen electrolyzer stack is controlled by controlling the DC link to thereby control hydrogen production. The method comprises: determining a grid voltage reference; providing a grid forming control for controlling at least the phase angle of the voltage of the power converter using a grid forming controller, operating according to a grid forming algorithm, the grid forming controller being configured to emulate inertia through control of the voltage of the power converter towards the grid voltage reference; the grid forming controller emulating inertia by charging and discharging an inherent capacitance of the electrolyzer stack; monitoring at least one operating parameter of the hydrogen electrolyzer stack; and limiting a change in charging level of the inherent capacitance based on the monitored operating parameter of the electrolyzer stack.
According to a first aspect of the invention, it is provided a method for connecting a renewable energy source to a grid, through a power converter, the power converter being configured to supply power from the renewable power source to the grid, and further being configured to operate as a grid forming converter and/or a grid following converter, and further the renewable energy source being connected to the grid through an inductor arrangement having an inductance, the inductance of the inductor arrangement being configured to be switchable between at least a first inductance and a second inductance, the second inductance being higher than the first inductance, the method comprising: switching the inductance of the inductor arrangement between the first inductance and the second inductance in dependence of a change of at least one grid condition prevailing in the grid wherein the at least one grid condition is determined as a measurement or estimation of a prevailing grid strength, the method further comprising: switching the inductor arrangement to the first inductance when the measurement of a prevailing grid strength is below a threshold, and switching the inductor arrangement to the second inductance when the measurement of a prevailing grid strength is above the threshold.
A wind turbine blade having a root end and a tip end and comprising a blade shell defining an internal cavity, the internal cavity having inner surfaces, the wind turbine blade further comprising a debris capture system with a debris capture device on at least one of the inner surfaces of the internal cavity, the debris capture device defining a capture volume and having an open end providing an opening into the capture volume and facing the root end of the wind turbine blade, and a closed end facing the tip end of the wind turbine blade, wherein the closed end has a surface inclined away from the inner surface in a direction towards the root end of the wind turbine blade.
A method of making a wind turbine blade componentA method of making a wind turbine blade component A method of making a wind turbine blade (10) component. The method comprises providing a sheet (36) comprising a first edge (44a), a first alignment feature (42a) located adjacent to the first edge and defining a first datum feature (46a), a second edge (44b), and a second alignment feature (42b) located adjacent to the second edge and defining a second datum feature (46b). The method further comprises providing a mould (28) defining a mould surface (30), and providing, at a first position along the mould surface, a first position marker (38a) indicating a first position. Additionally, the method comprises providing, at a second position along the mould surface (28), a second position marker (38b) indicating a second position. The method comprises arranging the sheet (36) on the mould surface (28), and aligning the first datum feature (46a) with the first position marker (38a) and aligning the second datum feature (46b) with the second position marker (38b) to thereby align the sheet on the mould. The first alignment feature (42a) is visually different in comparison to the second alignment feature (42b). Additionally or alternatively the first alignment feature (42a) is located at a different portion of the first edge (44a) in comparison to the location of the second alignment feature (42b) at the respective second edge (44b).
A method for tracking a gear tooth meshing angle of a gearbox of a wind turbine is disclosed. An initial reference virtual gear tooth meshing angle of the gearbox is selected, and an angular position of a high speed shaft and/or a low speed shaft of the gearbox is monitored. A virtual gear tooth meshing angle relative to the reference virtual gear tooth meshing angle is estimated, based on the monitored angular position of the high speed shaft and/or the low speed shaft and on information regarding topology of the gearbox. A number of full rotations of the high speed shaft and/or the low speed shaft which corresponds to an integer number of full periods of gear meshing of the gearbox is calculated, and the reference virtual gear tooth meshing angle is reset each time the high speed shaft and/or the low speed shaft has performed the calculated number of full rotations. The estimated virtual gear tooth meshing angle is applied to a periodic noise signal of the wind turbine.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 15/10 - Transmission de l’énergie mécanique utilisant un engrenage non limité à un mouvement rotatif, p. ex. comportant des organes oscillants ou à mouvement alternatif
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
28.
METHODS FOR USING WIND TURBINE ROTOR OR BLADE MAINTENANCE TOOLS AND ROTOR OR BLADE TOOLS THEREFOR
A method of repairing a wind turbine (10) including a tower (12) and a nacelle (14) connected to the tower (12). The nacelle (14) includes a main shaft (20) and a main bearing assembly (36). A rotor (16) is connected to the main shaft (20). The rotor (16) includes a hub (22) and a plurality of blades (24) connected at respective blade interfaces (28). The blade interfaces (28) define a rotor rotational plane (30). The method includes clamping a rotor maintenance tool (40) or a blade maintenance tool (70) to the tower (12). The rotor maintenance tool (40) or the blade maintenance tool (70) includes a tower clamp (42, 44, 84) for connecting the rotor maintenance tool (40) or the blade maintenance tool (70) to the tower (12) and a cradle assembly (46, 72) for supporting a portion of the rotor (16). The cradle assembly (46, 72) is movable relative to the tower (12) between a retracted position adjacent the tower (12) and an extended position. The method includes moving the cradle assembly (46, 72) from the retracted position to the extended position and into contact with the rotor (16) and disconnecting the rotor (16) from the nacelle (14) so that the rotor (16) is supported by the tower (12).
A method for damping power oscillation in an electric power grid, comprising: performing a procedure for determination of a phase shift between a filtered voltage signal and a filtered frequency signal; based on the performed procedure, determining which one of the filtered voltage signal and filtered frequency signal is leading or lagging in relation to the other one of the filtered voltage signal and filtered frequency signal; based on the determination of which one of the filtered voltage signal and filtered frequency signal is leading or lagging, setting a gain of a power oscillation damping controller to be positive or negative; applying the power oscillation damping controller with the set gain so as to produce an output signal outputted from the power oscillation damping controller; and based on the produced output signal, controlling an injection of electric power to the grid so as to dampen power oscillation in the grid.
A coating applicator tool head configured for use with a robotic maintenance device includes a tool head body with a frame, a supply container, a drive for actuating delivery of flow of coating from the supply container, a feed tube, a nozzle receiving flow from the feed tube, and a spreading tool such as a roller brush or a spatula receiving flow from the nozzle. The coating applicator tool head is moved by an articulated arm of the maintenance device over surface of a wind turbine blade containing damage such that the roller brush or spatula can apply layers of the coating to cover and fill in the damage. The nozzle directly supplies coating continuously onto the roller brush or the spatula, and the drive can be configured to independently adjust supply of two or more different components in the supply container that may be mixed to form the coating.
B05C 1/08 - Appareillages dans lesquels un liquide ou autre matériau fluide est appliqué à la surface de l'ouvrage par contact avec un élément portant le liquide ou autre matériau fluide, p. ex. un élément poreux imprégné du liquide à appliquer sous forme de revêtement pour appliquer un liquide ou autre matériau fluide à un ouvrage de longueur indéfinie en utilisant un rouleau
B05C 9/14 - Appareillages ou installations pour appliquer des liquides ou d'autres matériaux fluides aux surfaces par des moyens non prévus dans l'un des groupes , ou dans lesquels le moyen pour déposer le liquide ou autre matériau fluide n'est pas important pour appliquer un liquide ou autre matériau fluide et exécuter une opération auxiliaire l'opération auxiliaire nécessitant un chauffage
B05C 11/04 - Appareils pour étaler ou répartir des liquides ou d'autres matériaux fluides déjà appliqués sur une surfaceRéglage de l'épaisseur du revêtement comportant des lames
B05C 11/10 - Stockage, débit ou réglage du liquide ou d'un autre matériau fluideRécupération de l'excès de liquide ou d'un autre matériau fluide
B05D 1/28 - Procédés pour appliquer des liquides ou d'autres matériaux fluides aux surfaces par transfert de liquides ou d'autres matériaux fluides, à partir de la surface d'éléments porteurs, p. ex. de pinceaux, tampons, rouleaux
31.
A METHOD FOR PLANNING GRID CONNECTION OF A WIND FARM
A method for planning a wind farm (1) at a wind farm site (2) is disclosed Grid information related at least to a region comprising one or more potential wind farm sites (2), the grid information including information regarding grid connecting capability, is collected and stored a database. A potential wind farm site (2) is selected, grid information related to the selected potential wind farm site (2) is retrieved from the database, and grid connecting parameters of the planned wind farm (1) are obtained. At least one available grid connection option (6, 7) for the planned wind farm (1) at the selected potential wind farm site (2) is identified, based on the retrieved grid information and on the obtained grid connecting parameters.
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
The invention relates to adjusting individual pitch of wind turbine rotor blades. The invention involves obtaining an edge load signal indicative of edge loading on the individual rotor blades in a wind turbine rotor rotational frame, removing forward whirling frequency content corresponding to forward whirling motion from the edge signal, and applying a rotor azimuth-based transformation operation to obtain a backward whirling edge signal in a wind turbine rotor azimuth fixed frame. The backward whirling edge signal is split into first and second signals corresponding to disturbances at an edge frequency and at the edge frequency minus 2P, respectively. First and second control actions for mitigating backward whirling motion are applied to the first and second signals, respectively. The resulting signals are transformed back into rotor rotational frame to obtain individual pitch offset values which are then used to adjust pitch of the rotor blades.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
A pitch controlled wind turbine has a tower, a nacelle mounted on the tower, a hub mounted rotatably on the nacelle, and at least three wind turbine blades. Each wind turbine blade extends between a root end connected to the hub via a pitch mechanism, and a tip end. The wind turbine also has at least three blade connecting members, each blade connecting member extending from a connection point on one wind turbine blade towards a connection point on a neighbouring wind turbine blade, where the connection point on a given wind turbine blade is arranged at a distance from the root end and at a distance from the tip end of the wind turbine blade. The wind turbine also has at least three pre-tension members, each pre-tension member being connected to one of the blade connecting members and to the hub via a tensioning device, the tensioning device provides radial movement of a radially inward end of the pre-tension member with respect to an axis of rotation of the hub due to extension or retraction of the tensioning device, each pre-tension member thereby providing pre-tension in the blade connecting member to which it is connected. A lightning protection system protects each of the tensioning devices from lightning current and provides a lightning current path towards ground.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
Disclosed is a method, performed by an electronic device, for validation of a second version of a software or a second structure model for control of a wind turbine. The method comprises obtaining first load data from simulating a load of the wind turbine using a first structural model and a first version of the software. The method comprises obtaining second load data from simulating the load of the wind turbine using the first structural model and the second version of the software or using the first version of the software and a second structural model. The second version of the software is an update of the first version of the software. The second structural model is an update of the first structural model. The method comprises determining, based on the first load data and the second load data, a statistical parameter.
G05B 19/042 - Commande à programme autre que la commande numérique, c.-à-d. dans des automatismes à séquence ou dans des automates à logique utilisant des processeurs numériques
35.
A WIND TURBINE WITH BLADE CONNECTING TENSION MEMBERS WITH VARYING DIAMETER
A wind turbine (1) comprising a tower (2), a nacelle (3), and at least three wind turbine blades (5) is disclosed The wind turbine (1) further comprises blade connecting tension members (8) extending between a connection point (9) at one wind turbine blade (5) and a connection point (9) at a neighbouring wind turbine blade (5). Each blade connecting tension member (8) comprises a plurality of first sections (12) having a first cross sectional diameter and a plurality of second sections (13) having a second cross sectional diameter, where the first cross sectional diameter is smaller than the second cross sectional diameter. The first sections (12) and the second sections (13) are arranged alternatingly along a length direction of the blade connecting tension member (8). This reduces the noise generated during operation of the wind turbine (1).
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
36.
A WIND TURBINE WITH BLADE CONNECTING TENSION MEMBERS WITH A POROUS OUTER LAYER
A wind turbine (1) comprising a tower (2), a nacelle, a hub (4), and at least three wind turbine blades (5) is disclosed The wind turbine (1) further comprises blade connecting tension members (8) extending between a connection point (9) at one wind turbine blade (5) and a connection point (9) at a neighbouring wind turbine blade (5). Each blade connecting tension member (8) comprises a tension member core (10), and an outer layer (11) arranged circumferentially with respect to the tension member core (10), where the outer layer (11) is made at least partly from a porous material. This reduces the noise generated during operation of the wind turbine (1).
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
37.
METHOD OF MAKING A WIND TURBINE BLADE HAVING A FLATBACK PREFORM AND SYSTEM FOR MAKING SAME
A method of making a wind turbine blade (20) using a blade mould (40) to form at least a portion of the wind turbine blade (20) is disclosed. The method includes providing a flatback pre-mould (66) defining a mould surface (80), at least one mouldette (90) removably attached to the flatback pre-mould (66) to form part of the mould surface (80), and a flatback lifting tool (68). The method further includes forming a flatback preform (62) on the mould surface (80) of the flatback pre-mould (66) and securing the flatback preform (62) to the at least one mouldette (90) to form a flatback assembly (92). Next, detaching the at least one mouldette (90) from the flatback pre-mould (66), transferring the flatback assembly (92) from the flatback pre- mould (66) to the blade mould (40) using the flatback lifting tool (68), and arranging the flatback assembly (92) on the blade mould (40) such that the flatback preform (62) is positioned adjacent to a mould surface (46) of the blade mould (40).
A wind turbine fluid system comprising a fluid tank having a fluid level sensor that provides a tank level signal indicative of the level of fluid in the fluid tank; and a plurality of fluid-using components fluidly coupled to the fluid tank. The fluid system further comprises a processor configured to: determining an actual fluid volume of the fluid tank based at least in part on the tank level signal; using one or more models to generate an estimated fluid volume of the fluid tank based on data relating to the plurality of fluid-using components; comparing the estimated fluid volume of the fluid tank with the determined actual fluid volume of the fluid tank; triggering an alert action in the event that the result of the comparison indicates that a leak is present in the fluid system. The invention also relates to a method of detecting leakage of fluid in a system, a wind turbine comprising such a fluid system, and a computer program product. A benefit of the invention is that it provides a more accurate determination of leakage behaviour in a fluid system by monitoring the difference between an estimated volume of the fluid, for example hydraulic fluid, in the fluid tank and a measured value of fluid volume in the tank.
A wind turbine blade (108) providing enhanced shear distortion resistance comprises a root end (118) and a tip end (116), a leading edge (112) and a trailing edge (114), and a suction side shell (122) and a pressure side shell (124) between which there is provided first and second shear webs (150, 152, 166, 168, 170, 172). The first and second shear webs (150, 152, 166, 168, 170, 172) are arranged in V-configuration in a chordwise cross section of the blade, whereby at least one of the first and second shear webs (150, 152, 166, 168, 170, 172) is non-orthogonal to the chord line (115), and the first and second shear webs are non-parallel. A method of manufacturing the wind turbine blade includes the step of providing respective upper and lower mould halves (200, 202) for the blade interconnecting the first and second shear webs (150, 152, 166, 168, 170, 172) by an elastic structure (190) biasing the shear webs towards one another before closing the mould.
A method for installing at least one damper unit in a tower section of a wind turbine tower is disclosed. The tower section is arranged with its centre axis in a substantially horizontal orientation, and a guiderail is introduced into the tower section. A trolley is mounted on a part of the guiderail extending out of the tower section, the damper unit is mounted on the trolley, and the trolley with the damper unit is moved along the guiderail to a position inside the tower section. The damper unit is positioned in an installation position being vertically offset from the centre axis of the tower section, wherein the positioning comprises elevating the damper unit, and the damper unit is attached to the tower section at the installation position.
F03D 13/10 - Assemblage de mécanismes moteurs à ventDispositions pour l’érection de mécanismes moteurs à vent
F03D 13/20 - Dispositions pour monter ou supporter des mécanismes moteurs à ventPylônes ou tours pour des mécanismes moteurs à vent
F16F 15/023 - Suppression des vibrations dans les systèmes non rotatifs, p. ex. dans des systèmes alternatifsSuppression des vibrations dans les systèmes rotatifs par l'utilisation d'organes ne se déplaçant pas avec le système rotatif utilisant des moyens fluides
41.
CONTROL OF A RENEWABLE ENERGY POWER PLANT FOR SAFETY-RELATED FUNCTIONALITY
According to an aspect of the present invention, there is provided a switchgear control node for a switchgear device of a connection station The connection station comprises a plurality of switchgear devices connected to a substation of a renewable energy power plant via a distribution line. The power plant comprises a plurality of energy assets and each switchgear device is operable to selectively disconnect a power cable, connected to a respective one of the energy assets, from the distribution line. The switchgear control node is configured for hard real-time communication with a respective energy asset controller, associated with one of the plurality of energy assets, for controlling the switchgear device connecting that energy asset to the distribution line in hard real-time. The switchgear control node is configured to: receive a signal from the respective energy asset controller indicative of a disconnection request; and output a corresponding control signal to the switchgear device connecting the associated energy asset to the distribution line. The control signal is configured to cause said switchgear device to interrupt the connection of the associated energy asset to the distribution line.
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
H02J 13/00 - Circuits pour pourvoir à l'indication à distance des conditions d'un réseau, p. ex. un enregistrement instantané des conditions d'ouverture ou de fermeture de chaque sectionneur du réseauCircuits pour pourvoir à la commande à distance des moyens de commutation dans un réseau de distribution d'énergie, p. ex. mise en ou hors circuit de consommateurs de courant par l'utilisation de signaux d'impulsion codés transmis par le réseau
42.
A METHOD OF FILLING A BALLAST TANK WITHIN A WIND TURBINE BLADE AND ASSOCIATED WIND TURBINE BLADE
A method of filling a ballast tank (30) positioned within an interior of a wind turbine blade (20), the method comprising the steps of: providing a wind turbine blade (20), the wind turbine blade having a ballast tank (30) within an interior (42) of the blade; determining the location of the 5 ballast tank (30) in the blade (20); applying a visible position identifier (60) to an exterior surface (55) of the blade at a location corresponding to the position of the ballast tank (20); forming a hole (50) through the exterior surface (55) of the blade and into the ballast tank (30), at the location of the position identifier (60); introducing ballast material (48) through the hole (50) into the ballast tank (30)
A method for installing at least one damper unit (14) in a tower section (15) of a wind turbine tower is disclosed The tower section (15) is arranged with its centre axis in a substantially horizontal orientation, and a guiderail (1) is introduced into the tower section (15). A trolley (7) is mounted on a part of the guiderail (1) extending out of the tower section (15), the damper unit (14) is mounted on the trolley (7), and the trolley (7) with the damper unit (14) is moved along the guiderail (1) to a position inside the tower section (15). The damper unit (14) is positioned in an installation position being vertically offset from the centre axis of the tower section (15), wherein the positioning comprises elevating the damper unit (14), and the damper unit (14) is attached to the tower section (15) at the installation position.
The present disclosure relates to a wind turbine blade (7) comprising: a root end and a tip end; a leading edge (17) and a trailing edge (18); and a shell structure, the shell structure comprising a leeward shell (14) and a windward shell (15), the shell structure comprising an inner skin (29a, 29b) and an outer skin (30a, 30b), wherein the outer skin defines an outer surface of the wind turbine blade and the inner skin faces an interior volume of the blade. The wind turbine blade comprises a ballast unit (32) defining an internal ballast volume (33) for receiving a ballast material, wherein the ballast unit is integrated in the shell structure and sandwiched between the inner skin and the outer skin. The disclosure further relates to a method of manufacturing a wind turbine blade, and a rotor comprising three wind turbine blades.
A main nacelle unit (22) for forming a nacelle (14) of a wind turbine (10) includes a main housing (28) having an outer wall (30a. 30b) and containing a base frame (52) configured to be attached to a tower (12) of the wind turbine (10). The main nacelle unit (22) also includes at least one support frame (56) configured to support a wind turbine component (54) external to the main housing (28). A portion of the support frame (56) is attached to the base frame (52) and movable between a stored position and a deployed position. In the stored position, the portion of the support frame (56) is configured to be positioned within the confines of the main housing (28), and in the deployed position, the portion of the support frame (56) is configured to extend through the main housing outer wall (30a. 30b) to support the wind turbine component (54) external to the main housing (28). A method of assembling a wind turbine using the support assembly is also disclosed.
A wind turbine blade having at least two blade modules extending in the spanwise direction of the blade and being configured for connection end-to-end at a connection joint An electromagnetic shield is positioned in electrically conductive contact with the blade modules and extending across the connection joint in the spanwise direction.
A bushing (42, 92) for connecting a wind turbine blade (20) to a rotor hub (18) of a wind turbine (10) including a main body (44, 94) defining a connecting end of the bushing (42, 92) for receiving a fastener (130) for securing the blade (20) to the rotor hub (18), a tubular extension (46, 96) extending distally from the main body (44, 94) and defining a tip end of the bushing (42, 92) and a central bore (52, 102) extending from the connecting end to the tip end of the bushing (42, 92) and defining a central axis (94, 104) of the bushing (42, 92). The tubular extension (46, 96) includes one or more tapered or cylindrical sections (74,124) and a tip section (76, 126) distal of the one or more tapered or cylindrical sections (74, 124) and adjacent the tip end. The tip section (76, 126) includes an outer surface and an inner surface that are substantially parallel to each other and substantially parallel to the central axis (94, 104) of the bushing (42, 92).
According to the present invention there is provided a modular wind turbine blade comprising first and second blade modules connectable together to form at least part of the wind turbine blade, each blade module comprising an outer shell defining a pressure side and a suction side of the wind turbine blade. The first blade module comprises a first spar cap, and the second blade module comprising a second spar cap. The first spar cap has a tapered end portion in which the thickness of the first spar cap decreases towards the end of the first spar cap. The modular wind turbine blade further comprises an elongate connecting element for connecting the first and second blade modules together. The connecting element has a first tapered end portion in which the thickness of the connecting element decreases towards a first end of the connecting element. The first tapered end portion is configured for bonding to the tapered end portion of the first spar cap. The first spar cap has an inner surface and an outer surface, the thickness being defined between the inner surface and the outer surface. The first spar cap comprises (i) an intermediate thickness band; (ii) an inner thickness band between the intermediate thickness band and the inner surface; and (iii) an outer thickness band between the intermediate thickness band and the outer surface. Each of the thickness bands have a tapered end within the tapered end portion of the first spar cap. The connecting element has an inner surface and an outer surface, the thickness of the connecting element being defined between the inner surface and the outer surface. The connecting element comprises (i) an intermediate thickness band; (ii) an inner thickness band between the intermediate thickness band and the inner surface; and (iii) an outer thickness band between the intermediate thickness band and the outer surface. Each of the thickness bands has a tapered end within the first tapered end portion of the connecting element. The tapered end of the inner thickness band and/or the tapered end of the outer thickness band of the first spar cap has a lower rate of taper than the tapered end of the intermediate thickness band of the first spar cap. Additionally or alternatively, the tapered end of the inner thickness band and/or the tapered end of the outer thickness band of the connecting element has a lower rate of taper than the tapered end of the intermediate thickness band of the connecting element.
A wind turbine comprising a tower, a nacelle mounted rotatably on the tower via a yaw system and a hub carrying at least one wind turbine blade is disclosed. The wind turbine comprises a generator, an AC/DC converter connected to the generator and an electrolysis system connected to a DC power output of the AC/DC converter for producing hydrogen, the electrolysis system being arranged in an up-tower part of the wind turbine. A hydrogen transport line is connected to the electrolysis system for transporting hydrogen produced by the electrolysis system away from the electrolysis system, the hydrogen transport line extending in an interior part of the tower at least partly between the up-tower part of the wind turbine and a lower part of the tower. At least one hydrogen sensor are arranged in the interior part of the tower.
Systems, methods, and computer program products for controlling a yaw system of a wind turbine. The yaw system includes mechanical brakes that provide a first amount of braking torque when closed. The yaw system is configured to transition from a yawing state to a parked by brake state by closing mechanical brakes in a first subset of the mechanical brakes and opening each mechanical brake in a second subset of the mechanical brakes. The second subset provides a second amount of braking torque that is less than the first amount of braking torque. In response to detecting a rotation of the nacelle while in the parked by brake state, the yaw system is configured to transition from the parked by brake state to a parked by motor state in which yaw drives are activated to provide a counter acting torque in opposition to the detected rotation of the nacelle.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
A wind turbine blade having a blade shell with a lightning protection system; the lightning protection system comprising: a first metal layer; a second metal layer having an area no more than 10% of an area of the first metal layer; and a metal reinforcing disc formed across a portion of the second metal layer, wherein the metal reinforcing disc is fixed to the second metal layer so as to create an electrical connection with the second metal layer, and wherein a first portion of the first metal layer surrounds the second metal layer at an outer surface of the blade shell, and a second portion of the first metal layer overlaps the second metal layer and is in intimate electrical contact with the second metal layer.
A wind turbine cooling system comprising: a power converter enclosure having an first air cooling circuit being adapted to pass airflow over at least one power converter component, the blown-air cooling circuit comprising an air-to air heat exchanger and an air-to-liquid heat exchanger which are configured to cool air flowing in the blown-air cooling circuit; a second air cooling circuit configured to convey a flow of air between an air source and the air-to-air heat exchanger of the power converter enclosure to cool the air flowing in the first air cooling circuit; a liquid coolant circuit adapted to convey a flow of coolant between the air-to-liquid heat exchanger of the power converter enclosure, wherein the air-to-liquid heat exchanger is at is arranged to heat coolant flowing through the liquid coolant circuit; and, wherein the liquid coolant circuit further comprises a further heat exchanger configured to cool coolant flowing through the liquid coolant circuit. Beneficially, the cooling system of the invention provides cooling functionality for a power system of a wind turbine which is effective over a wider range of ambient conditions which means that the power generation systems of the wind turbine can maintain output power generation at extreme temperature ranges.
F03D 80/60 - Refroidissement ou chauffage des mécanismes moteurs à vent
F28D 15/00 - Appareils échangeurs de chaleur dans lesquels l'agent intermédiaire de transfert de chaleur en tubes fermés passe dans ou à travers les parois des canalisations
H02K 9/00 - Dispositions de refroidissement ou de ventilation
F16H 57/04 - Caractéristiques relatives à la lubrification ou au refroidissement
54.
A METHOD FOR DECREASING BLADE DEFLECTION DURING TOWER PASSAGE IN A WIND TURBINE
A method for controlling a wind turbine to decrease blade deflection during tower passage is disclosed. A blade flap moment of the wind turbine blades is measured. A blade flap moment of the wind turbine blades and a rotor tilt moment in a situation where the pitch offset has not been added are estimated, based on the measured blade flap moment. In the case that the estimated blade flap moment exceeds a first activation threshold value and the estimated rotor tilt moment exceeds a second activation threshold value, individual pitch angle adjustment of the wind turbine blades is initiated by adding a pitch offset, at azimuth angles within an azimuth adjustment region corresponding to tower passage of the wind turbine blades.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
55.
GENERATOR POWER PEAK LIMITING IN VIRTUAL SYNCHRONOUS MACHINE WIND TURBINE
Limiting generator loads in a wind turbine having a power converter with a line side inverter configured as a grid forming inverter. A maximum grid current value is determined based on a measured generator load and a limit function. A virtual impedance value and a virtual voltage drop over the virtual impedance value are determined. A virtual synchronous machine angle is determined based on a power reference and the virtual grid power. The voltage reference for controlling the line side inverter is determined based on the virtual synchronous machine angle, the virtual voltage drop and the voltage magnitude reference.
H02P 21/22 - Commande du courant, p. ex. en utilisant une boucle de commande
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
H02P 21/05 - Dispositions ou procédés pour la commande de machines électriques par commande par vecteur, p. ex. par commande de l’orientation du champ spécialement adaptés pour amortir les oscillations des moteurs, p. ex. pour la réduction du pompage
H02P 21/18 - Estimation de la position ou de la vitesse
H02P 101/15 - Adaptation particulière des dispositions pour la commande de génératrices pour éoliennes
H02P 103/20 - Dispositions pour la commande caractérisées par le type de génératrice du type synchrone
In an example there is provided a temporary work platform assembly for installation inside a wind turbine rotor blade. The work platform assembly comprises a platform for supporting a person during service or maintenance of the wind turbine blade, and a support structure for sup-porting the platform. The support structure is adapted for connection to an internal surface of the wind turbine blade. The platform comprises a plurality of panels.
E04G 3/24 - Échafaudages essentiellement supportés par le bâtiment, p. ex. réglables en hauteur spécialement adaptés pour des endroits particuliers des bâtiments ou pour des bâtiments de forme particulière, p. ex. cheminées de haut-fourneaux ou pylônes
E04G 5/10 - Marchepieds ou échelles spécialement adaptés pour les échafaudages
Aspects of the present invention relate to a method of controlling a renewable energy power plant connected to a power network. The renewable energy power plant comprises one or more renewable energy generators having an active power reserve for supplying additional active power to the power network and an energy storage system having an active power store. In response to detecting a frequency event on the power network a power sequence is implemented to manage the additional active power contributions from the energy storage system and the one or more renewable energy generators to satisfy the active power request.
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
58.
WIND TURBINE ROTOR BLADE PITCH CONTROL FOR TOWER FATIGUE REDUCTION
Adjusting pitch of the wind turbine rotor blades to reduce fatigue of the wind turbine tower. Flap loading sensor data is received for the rotor blades, and a flap loading vector in a rotor coordinate frame of the wind turbine is obtained. The flap loading vector is transformed to obtain first and second mutually orthogonal components in a fixed wind turbine coordinate frame, and respective 3P (blade passing frequency) components in the fixed frame indicative of 3P frequency content of the wind turbine tower are determined. A control action is applied to obtain respective 3P control components for mitigating the 3P frequency content of the tower, an inverse transform is applied to the 3P control components to obtain pitch reference offset values for the respective rotor blades in the rotor coordinate frame, and blade pitch is adjusted based on the pitch reference offset values.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
59.
METHOD AND APPARATUS FOR WIND TURBINE BLADE PRODUCTION FLANGE TRIMMING
A method of trimming a production flange (52) from a wind turbine blade (10) during manufacture of the wind turbine blade (10). The method comprises mounting a self-propelled flange trimming apparatus (60) on the production flange (52) and using a drive system (64, 66) of the apparatus (60) to propel the apparatus (60) along the production flange (52). A directional control system controls the direction of the apparatus (60) and a cutting tool (81) cuts through the production flange (52) as the apparatus (60) travels along the production flange (52). Also, a self-propelled production flange trimming apparatus (60) comprising a carriage (61) with a drive member (64, 66), a directional control system, and a cutting tool (81) attached to the carriage (61). A system comprising a wind turbine blade moulding (50) and a trimming apparatus (60) mounted on the production flange (52) of the moulding (50).
A method of operating a wind turbine, the wind turbine comprising a rotor and a yaw system, the yaw system comprising: a yaw ring and a pinion engaging the yaw ring. The method comprises: a) operating the yaw system to yaw the rotor in response to wind direction changes, thereby changing a rotor yaw direction; b) identifying a location of a damaged or missing tooth of the yaw ring; c) based on the identified location of the damaged or missing tooth and the location of the pinion, determining a safe sector and a restricted sector, wherein the pinion coincides with the location of the damaged or missing tooth when the rotor yaw direction is in the restricted sector; d) generating power with the rotor when the rotor yaw direction is in the safe sector; and e) disabling or otherwise modifying the operation of the wind turbine to substantially avoid generation of power by the rotor with the rotor yaw direction in the restricted sector.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
There is provided moulding apparatus for moulding a wind turbine blade shear web comprising a longitudinally-extending web panel and a web flange extending transverse to the web panel along a longitudinal edge of the web panel. The web flange comprises a first portion that extends on a first side of the web panel and defines at least part of a mounting surface for connecting the shear web to a wind turbine blade shell. The moulding apparatus defines a mould length. The moulding apparatus comprises a main mould comprising a longitudinally-extending main mould surface shaped to form at least part of the web panel, a tooling surface extending transverse to the main mould surface at a first inclination angle and shaped to form at least part of the first portion of the web flange, and a support surface extending transverse to the tooling surface at a second inclination angle. The moulding apparatus further comprises at least one mould element comprising a base surface for arrangement with the support surface of the main mould and a moulding surface extending transverse to the base surface at a third inclination angle. The moulding surface is shaped to form at least part of the mounting surface of the web flange. The first inclination angle varies along the mould length. The second inclination angle is substantially constant along the mould length. The third inclination angle is substantially constant along the mould length.
A wind turbine comprising includes a tower, a nacelle mounted on the tower, and a rotor mounted to the nacelle. The rotor comprises a hub and at least three pitchable wind turbine blades connected to the hub via respective pitch mechanisms. The airfoil profile of each blade has a thickness being the greatest distance between the windward and leeward sides orthogonal to the chord. Each blade comprises a connection point located at a first radial position between the blade root and the blade tip. The wind turbine further comprises one or more blade connecting members connected between the connection point and a corresponding connection point on a neighbouring blade. The thickness and/or the relative thickness of each blade is substantially constant or has a local minimum within an inboard portion of the blade between the blade root and the connection point.
A wind turbine blade having a blade shell with a lightning protection system; the lightning protection system comprising: a first electrically conductive pin, and a second electrically conductive pin adjacent to the first electrically conductive pin; a metal layer at an outer surface of the blade shell, the metal layer split into a first portion and a second portion with a discontinuity between the first and second portions; wherein the first electrically conductive pin extends through the first portion of the metal layer and not through the second portion of the metal layer; and wherein the second electrically conductive pin extends through the second portion of the metal layer and not through the first portion of the metal layer.
A wind turbine comprising a tower, a nacelle and a rotor hub. The wind turbine further includes a leak detection system comprising a control unit coupled with at least one elongated fluid sensing member positioned on a component within the wind turbine, the elongated fluid sensing member being responsive to the presence of hydraulic oil from a hydraulic power system of the wind turbine, and/or lubricating oil from an oil supply system of the wind turbine. The control unit is operable to monitor the elongated sensing member and to generate a response action in response to detecting the presence of the hydraulic oil and/or lubricating oil. Usefully, the elongated fluid sensing member enables detection over a greater distance compared with conventional approaches which rely on point detection of fluid leaks. Therefore, the invention provides a more effective system which is better able to detect leaks promptly so appropriate action can be taken to minimise the severity of the leak and to carry out any required clean-up action.
According to the present invention there is provided a mould for making a wind turbine blade shear web. The shear web comprises a longitudinally-extending web panel and a mounting flange extending along a longitudinal edge of the web panel and transverse to the web panel. The mounting flange comprises a first portion extending on a first side of the web panel and a second portion extending on a second side of the web panel. The mould comprises a longitudinally-extending main surface shaped to form the web panel, the main surface having a longitudinal edge. The mould further comprises a side surface arranged transverse to the main surface and extending downwards from the longitudinal edge of the main surface. The mould further comprises a base surface arranged transverse to the main surface and spaced from the side surface, the base surface having a first portion extending below the main surface to a first end of the base surface and a second portion extending above the main surface to a second end of the base surface. The first portion of the base surface is spaced from the side surface to define a mould cavity between the side surface and the first portion of the base surface, the mould cavity being configured to form the first portion of the mounting flange. The mould further comprises a datum-forming surface extending transversely from the second end of the base surface and defining a longitudinal edge at an intersection of the second portion of the base surface and the datum-forming surface. The second portion of the base surface and the datum-forming surface are configured to form the second portion of the mounting flange, and the datum-forming surface is configured to define a longitudinal edge of the second portion of the mounting flange.
B29D 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
B29C 70/44 - Façonnage ou imprégnation par compression pour la fabrication d'objets de longueur définie, c.-à-d. d'objets distincts utilisant une pression isostatique, p. ex. moulage par différence de pression, avec un sac à vide, dans un autoclave ou avec un caoutchouc expansible
B29L 31/08 - Pales pour rotors, stators, ventilateurs, turbines ou dispositifs analogues, p. ex. hélices
Wind turbine installation method the installation method including: providing a nacelle (2) at a wind turbine erection site, said nacelle (2) comprising: a main unit (20), arranged to be connected to the wind turbine tower (3), and configured for housing a rotor-supporting assembly of the wind-turbine: at least one auxiliary unit (21, 22) housing an operative component (34) forming part of the power conversion assembly, wherein: the main unit (20) and the auxiliary unit (21, 22) are separate units configured to be connected by a unit fixation structure at an interface, and wherein the operative component (34) is supportable directly on the main unit (20), said method further including: receiving a said main unit (20) and an auxiliary unit (21, 22) and an operative component (34) to said site of erection of the wind turbine, attaching to said main unit (20) the said auxiliary unit (21, 22) and said operative component (34). and attaching a lifting yoke (50) to the main unit (20) and hoisting the main unit (20) together with the auxiliary unit (21, 22) by means of a crane attached to the lifting yoke (50), wherein the auxiliary unit (21, 22) is supported and lifted by the main unit (20) during the hoisting, and installing the main unit (20) and the attached auxiliary unit (21, 22) at the tower top.
A method for introducing a component (7) in a nacelle (6) of a wind turbine by means of a guiding tool is disclosed The guiding tool comprises a first part (1) mounted at or near an upper opening (5) of the nacelle (6) and a second part (9) mounted on or forming part of the component (7) being introduced. The first part (1) comprises at least one guiding portion (3) having a wide entrance (3a), a narrow track (3b) and a tapered portion (3c) interconnecting the wide entrance (3a) and the narrow track (3b), and the second part (9) comprises at least one protruding portion (10). The component (7) is lifted to a position above the nacelle (6), and subsequently lowered while causing the at least one protruding portion (10) of the second part (9) of the guiding tool to engage with the wide entrance (3a) of the at least one guiding portion (3) of the first part (1) of the guiding tool and guiding the at least one protruding portion (10) of the second part (9) of the guiding tool along the tapered portion (3c) and the narrow track (3b), so as to position the component (7) relative to the nacelle (6), during the lowering of the component (7).
A fastening system (60) and method for connecting a flange (64) of one tower section (62) to a flange (74) of an adjacent tower section (72) is disclosed. The first and second flanges (64, 74) have aligned through holes (66, 76). The fastening system (60) includes a plurality of bolts (82) received in a plurality of aligned through holes (66, 76) in the respective flanges (64, 74) and first and second bolt extenders (100, 104, 198, 202, 210, 214). Each bolt extender (100, 104, 198, 202, 210, 214) has a plurality of extender bores (102, 106), each receiving one of the plurality of bolts (82). For each adjacent pair of extender bores (102, 106) one extender bore is threaded and the other is unthreaded. For each adjacent pair of bolts (82), one bolt (82) has a first orientation and the other bolt (82) has a second orientation opposite to the first orientation.
A method of commissioning a wind turbine, wherein the wind turbine comprises a tower extending along a tower axis (X), a tower top and at least one connection flange, the wind turbine having a tower damping system actuatable to control oscillatory movement of the tower, in use. The method comprises: controlling the tower damping system during a tower-settling phase of operation to cause the tower top to move in a plurality of directions (F1-F4) about at least a part of the tower axis to release residual stress in the at least one connection flange of the tower of the wind turbine. A benefit of the invention is the release of stresses built in during the manufacturing of tower sections of the wind turbine can be released rapidly allowing a more efficient commissioning process to be achieved.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 13/20 - Dispositions pour monter ou supporter des mécanismes moteurs à ventPylônes ou tours pour des mécanismes moteurs à vent
71.
INSPECTION OF BOLTED CONNECTIONS IN A WIND TURBINE
A method and system for scheduling inspection of a bolted connection on a wind turbine, the bolted connection comprising a bolt under tension. At a first sample time, a first tension parameter of the bolt is determined, having an associated upper uncertainty bound, and, at a second sample time, a second tension parameter of the bolt is determined, having an associated lower uncertainty bound. Thereafter, a linear relationship is determined based on the upper uncertainty bound of the first tension parameter and the lower uncertainty bound of the second tension parameter. Based on that linear relationship, a third sample time is determined in the future, at which a further tension parameter is determined. Based on the third sample time, an inspection event is scheduled. A benefit of the invention is that inspection events are scheduled in an adaptive manner in a way that is responsive to the difference in values of those measurements, but which takes account of the inherent uncertainty in such measurements without compromising safety. In this way, inspection events can be scheduled less frequently that is currently the case which presents a much- reduced maintenance cost which still ensuring the integrity of the bolted connection.
F16B 31/00 - Assemblages à vis spécialement modifiés en vue de résister à une charge de tractionBoulons de rupture
G01N 29/00 - Recherche ou analyse des matériaux par l'emploi d'ondes ultrasonores, sonores ou infrasonoresVisualisation de l'intérieur d'objets par transmission d'ondes ultrasonores ou sonores à travers l'objet
72.
IMPROVEMENTS RELATING TO SERVICE GALLERIES IN WIND TURBINE TOWERS
According to one aspect there is provided a wind turbine tower platform assembly comprising a platform floor adapted to be connected to a wind turbine tower section. The platform floor defines a hatchway, and the wind turbine tower platform assembly further comprises a fall protection barrier surrounding at least a portion of the hatchway in the platform floor. The fall protection barrier comprises a first barrier module connected to the platform floor and configured to extend away from the platform floor for a first distance. The fall protection barrier further comprises a second barrier module connected to the first barrier module and configured to extend away from the first barrier module for a second distance.
A wind turbine blade shell comprising: an inner shell portion comprising a fibre reinforced composite material; an outer shell portion; an electro-thermal heating element embedded within the blade shell; and a metallic power line which is connected to the electro-thermal heating element at a terminal. The metallic power line is configured to carry electrical power to the electro-thermal heating element via the terminal. The metallic power line is sandwiched between the inner and outer shell portions.
A wind turbine blade (20) that extends longitudinally in a spanwise direction between a root end (24) and a tip end (26), and in a chordwise direction between a leading edge (28) and a trailing edge (30), is disclosed. The wind turbine blade (20) includes a first opposing half-shell portion (34) and a second opposing half-shell portion (36) which together define an interior (38) the wind turbine blade (20), and at least one shear web (52) that extends between the first opposing half-shell portion (34) and the second opposing half-shell portion (36). The wind turbine blade (20) further includes at least one vibration damping device (60, 90, 122, 124, 126, 128, 132, 204, 224, 230, 250) for reducing noise emission from the wind turbine blade (20). The at least one vibration damping device (60, 90, 122, 124, 126, 128, 132, 204, 224, 230, 250) includes at least one resonating member (62, 138, 202, 232, 260) that extends from a surface of the wind turbine blade (20) to a distal end (70, 96, 156, 186, 206, 234, 262) that is configured to oscillate to dissipate vibrational energy away from the surface of the wind turbine blade (20).
F03D 80/00 - Détails, composants ou accessoires non prévus dans les groupes
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
75.
ACTIVATION OF WIND TURBINE PITCH CONTROL BASED ON RATE OF CHANGE OF WIND TURBINE COMPONENT OSCILLATION
The invention relates to activation of a pitch controller for controlling pitch of rotor blades of a wind turbine. The invention includes receiving a sensor signal, from at least one sensor of the wind turbine, indicative of oscillatory motion of a component of the wind turbine. The invention includes determining, based on the received sensor signal, a magnitude of the oscillatory motion of the component, and determining, based on the determined magnitude, a rate of change of the magnitude of oscillatory motion. The invention includes controlling activation of the pitch controller based on the determined rate of change of the magnitude of oscillatory motion.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
A wind turbine nacelle having a base frame comprising a nacelle mounting ring including a mounting face adapted to be mountable to a wind turbine tower. The nacelle mounting ring has an open central aperture that, in use, conjoins an interior volume of the nacelle and an interior volume of the tower, wherein the mounting face defines a mounting plane. The wind turbine nacelle includes at least one electrical cabinet that is movably coupled, either directly or indirectly, to the base frame at a coupling point or, more simply, 'coupling', to move between a first and a second position. The coupling point is located within a cylindrical volume defined by and concentric with a diameter of the nacelle mounting ring, and which extends upwards from the mounting plane by a perpendicular distance corresponding to 80% of the diameter of the nacelle mounting ring and which extends downwards from the mounting plane by a perpendicular distance corresponding to 20% of the diameter of the nacelle mounting ring.
A method of installing a service lift (22) in a wind turbine tower (12) is provided. The wind turbine tower (12) includes an upper tower portion (32) that is configured to be connected to a lower tower portion (30) to form the wind turbine tower (12). The method includes providing an upper tower stand (36) at a tower pre- assembly site (34) and providing the upper tower stand (36) with the service lift (22). The method includes connecting the upper tower portion (30) of the wind turbine tower (12) to the upper tower stand (36) so that the upper tower portion (30) is supported on the upper tower stand (36), and connecting the service lift (22) in the upper tower stand (36) to the upper tower portion (30) of the wind turbine tower (12) so that the service lift (22) is operational within the upper tower portion (30). The method further includes operating the service lift (22) within the upper tower portion (30) of the wind turbine tower (12) and securing the service lift (22) to the upper tower portion (30) at a location vertically spaced from the upper tower stand (36) for subsequent assembly of the wind turbine tower (12).
A linear actuator for a pitch system of a wind turbine, comprising an actuator body and an actuator rod which is movable linearly with respect to the actuator body along an actuator axis. In one example, the linear actuator is in the form of a hydraulic actuator or 'ram' such that the actuator body is a hydraulic cylinder and the actuator rod is a cylinder rod. The actuator rod has a rod end and a rod end coupling attached to the rod end. The rod end coupling comprises a housing that receives the rod end, wherein at least one interference element is received in a recess in a circumferential part of the rod end. The at least one interference element is constrained in a radial direction within the recess by the housing, wherein the recess is shaped to prevent axial movement of the interference element in an outward axial direction away from the actuator body thereby to prevent axial movement of the housing in the outward axial direction and wherein the rod end coupling further comprises a connector bearing, wherein the housing bears against the connector bearing which prevents axial movement of the housing in an inner axial direction towards the actuator body relative to the actuator rod.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F15B 15/14 - Dispositifs actionnés par fluides pour déplacer un organe d'une position à une autreTransmission associée à ces dispositifs caractérisés par la structure de l'ensemble moteur le moteur étant du type à cylindre droit
According to a first aspect of the present invention there is provided a method of making a wind turbine blade comprising a blade shell having an outboard blade shell portion and an inboard blade shell portion defining a root end of the blade shell. The method comprises 5 providing a first mould shaped to form a first shell part and a second mould shaped to form a second shell part. The first and second moulds are female moulds each comprising an outboard mould surface shaped to form an outboard portion of the respective shell part and an inboard mould surface shaped to form a mandrel portion of the respective shell part. The method further comprises arranging one or more layers of fibre material in each 10 mould on the outboard mould surface and on the inboard mould surface. The method further comprises supplying resin to the fibre material in each mould and at least partially curing the resin to form a first shell part and a second shell part. Each shell part comprises an outboard portion and a mandrel portion. The outboard portions of the first and second shell parts together form the outboard blade shell portion and the mandrel portions of the 15 first and second shell parts together define a mandrel. The mandrel comprises one or more moulded laminate layers defining a partial shell thickness that is less than a final shell thickness of the inboard blade shell portion. The method further comprises winding additional fibre material onto the mandrel to build up the thickness of the inboard blade shell portion. Further, the method comprises supplying resin to the fibre material wound 20 onto the mandrel. The method further comprises curing the resin supplied to the fibre material to bond the wound fibre material to the mandrel and thereby form the inboard blade shell portion.
B29C 70/32 - Façonnage par empilage, c.-à-d. application de fibres, de bandes ou de feuilles larges sur un moule, un gabarit ou un noyauFaçonnage par pistolage, c.-à-d. pulvérisation de fibres sur un moule, un gabarit ou un noyau sur un moule, un gabarit ou un noyau rotatifs
80.
Method for controlling a power plant with a synchronous condenser, and power plant
The invention relates to a power plant connected to an electrical grid and a method for controlling the power plant. The power plant comprises one or more power generators and at least one synchronous condenser. The power generators may be wind turbine generators, solar photovoltaic elements or other kinds of renewable power generators. During a deviation in frequency on the electrical grid, the synchronous condenser counteracts the frequency deviation, but it may also unintentional supply active power during the frequency event. The control method is controlling the active power supply from the power generators during the frequency events based only on the active power output from the power generators.
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
81.
A WIND TURBINE WITH AN UP-TOWER ELECTROLYSIS SYSTEM
A wind turbine comprising a tower, a nacelle mounted rotatably on the tower via a yaw system and a hub carrying one or more wind turbine blades is disclosed. The wind turbine further comprises a generator, an AC/DC converter connected to the generator and an electrolysis system connected to a DC power output of the AC/DC converter for producing hydrogen. The electrolysis system is arranged in an up-tower part of the wind turbine, e.g. in the nacelle. The wind turbine further comprises a hydrogen transport line connected to the electrolysis system for transporting hydrogen produced by the electrolysis system away from the electrolysis system, the hydrogen transport line extending along an exterior surface of the tower from the position of the electrolysis system to a lower part of the tower.
F03D 9/19 - Combinaisons des mécanismes moteurs à vent avec un appareil emmagasinant de l’énergie emmagasinant de l’énergie chimique, p. ex. par électrolyse
C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
F03D 9/25 - Mécanismes moteurs à vent caractérisés par l’appareil entrainé l’appareil étant un générateur électrique
Disclosed is a method for controlling a floating wind turbine system. The floating wind turbine system comprises a floating platform, a tower mounted to the floating platform and a nacelle. The method comprises receiving, from one or more sensors of the floating wind turbine system, a signal indicative of a vertical acceleration of the floating wind turbine system. The method comprises determining, based on the received signal, a sea state parameter indicative of an oscillation of the vertical acceleration. The method comprises controlling the floating wind turbine system based on the sea state parameter.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à ventPylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
83.
METHOD OF DAMPING MOTION OF A FLOATING WIND TURBINE
A method of damping motion of a wind turbine, the wind turbine comprising a rotor and a floating platform. A motion signal is generated which is indicative of a motion of the wind turbine. A wind direction signal is generated which is indicative of a wind direction relative to the floating platform. A damping signal is generated on the basis of the motion signal and the wind direction signal, and the motion of the wind turbine is damped on the basis of the damping signal, for instance by adjusting the pitch of the rotor blades. A phase of the damping signal may be controlled on the basis of the wind direction signal.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à ventPylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
A wind turbine blade having a blade shell with a lightning protection system. The lightning protection system has a first metal layer at an outer surface of the blade shell and a second metal layer at the outer surface of the blade shell and stacked on the first metal layer to form intimate electrical contact with the first metal layer at a multiple-thickness region.
According to the present invention there is provided a wind turbine blade extending in a spanwise direction between a root and a tip, and in a chordwise direction between a leading edge and a trailing edge. The wind turbine blade has a spar cap comprising a plurality of strips of fibrous composite material. Each strip extends in the spanwise direction between a first end and a second end to define a length of the strip, and each strip has a width and a thickness, the width being less than the length, and the thickness being less than the width. Each strip has upper and lower major surfaces defined by the length and width dimensions. Each strip has side surfaces defined by the length and thickness dimensions. The plurality of strips includes a first strip and a second strip. The first strip has a tapered end portion in which the thickness of the first strip decreases towards the first end of the first strip. The tapered end portion defines a tapered end face inclined with respect to the upper and lower major surfaces of the first strip. The first and second strips are bonded together such that the first end of the first strip meets the upper or lower major surface of the second strip to define an interface between the first and second strips. The spar cap further comprises a patch arranged across the interface. The patch comprises a stack of fibrous plies.
A method for predicting performance of a planned wind power plant comprising a plurality of wind turbines (11) is disclosed Historical atmospheric data (1) related to a region in which the site of the planned wind power plant is located, and information (12) regarding local terrain conditions at the site of the planned wind power plant, are obtained. Based on the historical atmospheric data (1) and the local terrain conditions (12), computer simulation (2, 3) of expected local wind and/or weather conditions expected at the site of the planned wind power plant, within a predefined future time period, is performed. Expected performance of the wind power plant is predicted (7, 13), based on the computer simulation (2, 3) and on information related to the wind turbines (11) of the planned wind power plant, within the predefined future time period.
A method of making at least a portion of a wind turbine blade is described. The method comprises providing a tool shaped to form at least a portion of a wind turbine blade; providing fibrous reinforcing material on the tool; providing a blade component on the tool or on the fibrous reinforcing material; securing the blade component in a predetermined position relative to the tool using a fastener having a head and a shank; providing a cap shaped to fit snugly over the head of the fastener, and arranging the cap on the head of the fastener; covering the fibrous reinforcing material, the blade component, the fastener and the cap with a vacuum bag and sealing the vacuum bag to form a sealed region encapsulating the fibrous reinforcing material, the blade component, the fastener and the cap; optionally evacuating the sealed region; providing resin to the sealed region; curing the resin to integrate the fibrous reinforcing material and the blade component; removing the vacuum bag; removing the cap from the head of the fastener; and optionally removing the fastener from the blade component. The cap prevents the head of the fastener from being contaminated by resin during the manufacturing process.
B29D 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
B29C 70/44 - Façonnage ou imprégnation par compression pour la fabrication d'objets de longueur définie, c.-à-d. d'objets distincts utilisant une pression isostatique, p. ex. moulage par différence de pression, avec un sac à vide, dans un autoclave ou avec un caoutchouc expansible
B29C 70/72 - Enrobage d'inserts avec une partie non enrobée, p. ex. extrémités ou parties terminales de composants électriques
B29C 70/76 - Moulage sur les bords ou les extrémités de la partie préformée
B29C 33/12 - Moules ou noyauxLeurs détails ou accessoires comportant des moyens incorporés pour positionner des inserts, p. ex. marquages
B29C 70/86 - Incorporation dans des couches de renforcement imprégnées cohérentes
The disclosure relates to controlling blade pitch in a wind turbine that has a plurality of rotor blades and a hydraulic pitch system for adjusting a pitch of each of the rotor blades. The disclosure describes a method comprising obtaining a measurement indicative of a current level of hydraulic pressure available in the hydraulic pitch system, and determining, based on the obtained measurement, an adaptive pitch reference rate indicative of a rate at which the pitch of the rotor blades is to be adjusted by the hydraulic system. The method includes controlling the hydraulic pitch system to adjust the pitch of the rotor blades in accordance with the determined adaptive pitch reference rate.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
89.
Identifying recurrent free-flow wind disturbances associated with a wind turbine
The invention provides a method of identifying recurrent free-flow wind disturbances associated with a wind turbine. The method comprises monitoring a signal indicative of a parameter associated with operation of the wind turbine, determining an expected signal of the parameter based on the monitored signal, determining a difference between values of the monitored signal and the determined expected signal, and correlating the determined differences with yaw position of a nacelle of the wind turbine. The method includes determining, based on the correlated differences, unexpected values of the parameter for different yaw positions, and identifying, based on a frequency of occurrence of the determined unexpected values, a recurrent free-flow wind disturbance associated with a yaw position of the nacelle.
A method of replacing a component (28b) of an offshore wind turbine (10) includes providing a sea vessel (30) having a transport system (50)) with a base (52), an elongate platform (54) connected to the base (52), and a transport frame (56a, 56b) for receiving a component (28b) of the wind turbine (10). The sea vessel (30) is positioned such that its deck (40) is separated from the wind turbine (10) by more than a maximum working distance (72) of a crane (26) onboard the wind turbine (10), and further positioned such that in an extended position, the transport frame (56a, 56b) is within the maximum working distance (72) of the crane (26), and in a retracted position, the transport frame (56a, 56b) is outside of the maximum working distance (72). The method includes arranging the transport frame (56a, 56b) in the extended position, lowering a component (28b) of the wind turbine (10) using the crane (26), and placing the component (28b) on the transport frame (56a, 56b). A transport system (50) for handling wind turbine components (28a, 28b) is also disclosed.
B63B 77/10 - Transport ou installation de structures en mer sur site par flottaison, p. ex. en utilisant des barges semi-submersibles, en ballastant la structure ou transport de plateformes pétrolières-gazières spécialement adaptés aux installations de production d'énergie électrique, p. ex. aux éoliennes ou aux générateurs à turbine marémotrice
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à ventPylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
F03D 13/40 - Dispositions ou procédés spécialement adaptés au transport de composants de mécanismes moteurs à vent
The invention relates to control of a wind turbine that includes a tower, a nacelle atop the tower, and a drivetrain that has drivetrain components housed in the nacelle. The invention includes receiving, from sensors of the wind turbine, sensor data indicative of movement of the nacelle. The invention includes determining, based on the received sensor data, a velocity of the nacelle in a roll direction defined relative to an axis of rotation of the drivetrain, where the velocity of the nacelle is determined in a fixed coordinate system. The invention then includes controlling the drivetrain of the wind turbine to dampen movement of the nacelle in the roll direction based on the determined nacelle roll velocity.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
A wind turbine cooling system comprising: a coolant circuit adapted to convey coolant between a first heat exchanger arranged to cool coolant flowing through the coolant circuit; and a second heat exchanger arranged to heat coolant flowing through the coolant circuit; a coolant pump adapted to pump coolant around the coolant circuit; a first flow control valve having first and second ports, wherein coolant flows between the first and second ports along the coolant circuit in a cooling mode of operation, the first flow control valve further having a third port to which is connected an expansion tank, and a fourth port adapted for connection to a coolant filler tank; a second flow control valve having first and second ports, wherein coolant flows through the first and second ports during the cooling mode of operation. The second flow control valve further includes a third port, wherein coolant flows between the second and third ports during a bypass mode of operation in which coolant bypasses the first heat exchanger, and a fourth port adapted for connection to a coolant filler tank. Beneficially, three modes of operation of the system are achieved with only two four-way valves and a single pump, which represents a significant reduction in complexity and cost over known systems of comparable functionality.
There is provided a wind turbine blade having a root end, a tip end, a blade shell, a lightning protection system and an integrated web-down conductor. The integrated web-down conductor comprises: a down conductor forming part of the lightning protection system: electrical insulation surrounding the down conductor; and a web that surrounds the electrical insulation so as to enclose the down conductor and electrical insulation and is coupled to the blade shell.
The invention pertains to wake steering. A second wind turbine is positioned downstream of the first wind turbine so that it can be affected by a wake of the first wind turbine. In a method of the invention, a yaw offset signal is applied to create a yaw offset between a rotor of the first wind turbine and the wind direction, and the yaw offset signal is varied based on a transfer function in response to changes in the wind direction. The transfer function comprises: a negative offset band, a negative transition, a positive offset band, a positive transition, and a dead band between the positive and negative transitions.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
Aspects of the present disclosure relates to a wind turbine blade. The blade comprises a main reinforcement structure, the main reinforcement structure comprising a main windward reinforcement structure and a main leeward reinforcement structure; a rear reinforcement structure, the rear reinforcement structure comprising a rear windward reinforcement structure and a rear leeward reinforcement structure; and a trailing edge reinforcement structure arranged between the rear reinforcement structure and a trailing edge of the blade. The main windward reinforcement structure and the main leeward reinforcement structure comprise layers of pultruded fibres of a first material. The rear windward reinforcement structure and/or the rear leeward reinforcement structure comprise layers of pultruded fibres of a second material, the pultruded fibres of the first material having a Young's modulus greater than the pultruded fibres of the second material. The trailing edge reinforcement structure comprises fibres aligned with the trailing edge of the blade.
The present disclosure relates to a method of manufacturing wind turbine blades. The method comprises the steps of: providing leeward and windward shell mould surface geometries; and manufacturing a first and a second blade by the sub-steps of: moulding a leeward shell and a windward shell in the shell mould surface geometries; engaging a main and a rear leeward reinforcement structure with the leeward shell; engaging a main and a rear windward reinforcement structure with the windward shell; and forming the first blade from the leeward shell and the windward shell. The first blade and the second blade have the same external geometry. Manufacturing the first blade further comprises the sub-step of: arranging a first trailing edge reinforcement structure at the trailing edge of the first blade, the first trailing edge reinforcement structure comprising fibres aligned with the trailing edge of the first blade.
A wind turbine nacelle including an outer cover defining an interior volume within which is housed a powertrain assembly comprising: a gearbox including an input shaft and an output shaft which are aligned on a common rotational axis, an electrical power generator connected to the output shaft of the gearbox. The power generator includes a generator cabinet that encloses, in an internal chamber, a stator at a radially outward position and a rotor in a radially inward position, the rotor being rotatable about the common rotational axis. The rotor comprises: a cylindrical field structure coupled to a rotor support frame; a gearbox connection flange that couples to the gearbox output shaft by a first fixing array; wherein the generator cabinet is provided with an opening that permits maintenance personal to gain access fully inside the internal chamber, and wherein the internal chamber is configured to allow maintenance personnel to access at least the first fixing array that couples the gearbox output shaft to the gearbox connection flange from a position fully inside the internal chamber.
Systems, methods, and computer program products for monitoring occurring rotor imbalances. A dynamic characteristic sensor determines the value of a dynamic characteristic of a wind turbine, e.g., of a nacelle thereof, such that the dynamic characteristic includes a component aligned with a rotor plane of the rotor. The dynamic characteristic is sampled when the rotor of the wind turbine is at each of a plurality of azimuth angles (ψn) to produce a sequence of dynamic values (a(ψ)). An azimuth-domain transform is applied to the sequence of dynamic values (a(ψ)) to generate at least one inverse-angle component (A(γk)). Rotor imbalances are then detected based on the inverse-angle component (A(γk)), such as by comparing a value of the inverse-angle component (A(γk)) to a threshold, and the rotation of the rotor is stopped.
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
99.
IMPROVEMENTS RELATING TO COOLING OF ELECTRIC MACHINES
An electric machine comprising a rotor including a plurality of hollow conductor bars adapted for carrying cooling fluid therein, the conductor bars extending between first and second short circuit rings. At least one of the short circuit rings is adapted to provide an annular sump volume that feeds cooling fluid to at least some of the hollow conductor bars. Restricted spray orifices are provided in communication with the hollow conductor bars to provide a spray of cooling fluid towards other generator components. The restricted orifices are configured to have a flow area (A') that is less than the average flow area (B') of the respective first hollow conductor bar such that, in use, the flow of cooling fluid through the outlet end of the plurality of first hollow conductor bars is balanced with cooling fluid delivered to the annular sump volume to maintain a flow of fluid through the respective fluid conduits.
H02K 1/32 - Parties tournantes du circuit magnétique avec des canaux ou des conduits pour l'écoulement d'un agent de refroidissement
H02K 3/22 - Enroulements caractérisés par la configuration, la forme ou le genre de construction du conducteur, p. ex. avec des conducteurs en barre formés de conducteurs creux
H02K 9/19 - Dispositions de refroidissement ou de ventilation pour machines avec enveloppe fermée et circuit fermé de refroidissement utilisant un agent de refroidissement liquide, p. ex. de l'huile
H02K 17/16 - Moteurs asynchrones à induction avec des rotors à enroulement court-circuité à l'intérieur de la machine, p. ex. des rotors à cage
A generator rotor for a wind turbine, comprising a cylindrical ring structure defining a radially inner surface and a central hollow portion, and being arranged to rotate around a rotational axis. The cylindrical ring structure comprise a plurality of ring-shaped permanent magnet packages arranged coaxially around the rotational axis, the plurality of permanent magnet packages being adapted to form at least one coolant passage through the cylindrical ring structure. The cylindrical ring structure is adapted to serve as a sump for coolant, such that the sump is defined, at least in part, by the radially inner surface of the cylindrical ring structure, and further comprises at least one coolant passage inlet that extends from the radially inner surface of the cylindrical ring structure to the at least one coolant passage and wherein at least one coolant passage outlet is arranged at one axial end of the cylindrical ring structure.
H02K 1/276 - Aimants encastrés dans le noyau magnétique, p. ex. aimants permanents internes [IPM]
H02K 1/32 - Parties tournantes du circuit magnétique avec des canaux ou des conduits pour l'écoulement d'un agent de refroidissement
H02K 7/18 - Association structurelle de génératrices électriques à des moteurs mécaniques d'entraînement, p. ex. à des turbines
H02K 9/19 - Dispositions de refroidissement ou de ventilation pour machines avec enveloppe fermée et circuit fermé de refroidissement utilisant un agent de refroidissement liquide, p. ex. de l'huile
