A control method and associated system provide for thermal management of cables within a structure of a wind turbine. An airflow is established through the structure, the airflow moving along and around the cables within the structure to remove heat generated in the cables via heat transfer from a core of the cables through a surrounding insulation layer of the cables. Ambient temperature and a volumetric flow rate of the airflow adjacent the cables is measure. Based on the flow rate and the ambient temperature, a threshold current capacity limit for the cables is determined and used as a control factor for increasing power production of the wind turbine within thermal limits of the cables.
The present disclosure relates to methods (100, 200, 300) for controlling a wind turbine (10) during a yaw operation. The present disclosure further relates to control systems (92) for wind turbines and to wind turbines (10). A method for operating a wind turbine (10) during yaw operation comprises operating one or more yaw drives (35) to rotate the nacelle (16) with respect to the tower (15). In addition, the method comprises predicting an end of the yaw operation and, in response to predicting an end of the yaw operation, actuating a hydraulic brake (94) before the predicted end.
A system for optimizing performance of a wind turbine during noise reduced operation includes a supervisory controller and a converter controller. The converter controller is configured to perform a plurality of operations including operating the wind turbine at a first optimization mode or a second optimization mode. The first optimization mode includes actively adjusting a power output of the wind turbine based on grid parameter(s) so as to maximize energy production of the wind turbine without accelerating consumption of life of component(s) thereof. The second optimization mode includes operating the wind turbine at a maximum power output rating while tracking remaining life of the component(s) based on a plurality of parameters. When the remaining life of the component(s) exceeds a predetermined threshold, the converter controller generates a notification to indicate that a maintenance action is needed.
A system and method are provided for manufacturing a tower structure. Accordingly, a first printed layer of a wall element is deposited with a printhead assembly, and an actual midline perimeter length of the first printed layer is determined. A horizontal reinforcement assembly is then formed based, at least in part, on the actual midline perimeter length. The formed horizontal reinforcement assembly is positioned in a horizontal orientation on the first printed layer and in axial alignment with the vertical axis of the tower structure. With the horizontal reinforcement assembly positioned on the first printed layer, a second printed layer of the wall element is deposited via the printhead assembly on the horizontal reinforcement layer.
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B33Y 80/00 - Products made by additive manufacturing
E04G 21/04 - Devices for both conveying and distributing
E04H 12/12 - Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcement, e.g. with metal coverings, with permanent form elements
F03D 13/10 - Assembly of wind motorsArrangements for erecting wind motors
The present disclosure relates to methods (100, 200) for operating in wind farm grids (108) of wind farms (105) which are electrically disconnected from a utility grid (102), for example wherein communication with a wind farm controller (109) has been lost. The present disclosure further relates to wind farms (105), wind farm grids (108) and wind turbines (10). A method (100) comprises operating one or more first wind turbines (111) to generate electrical power with predetermined electrical characteristics when the wind farm (105) is disconnected from a utility grid (102), and delivering the electrical power with the predetermined electrical characteristics to the wind farm grid (108); and one or more second wind turbines (112) detecting (120) the electrical power delivered to the wind farm grid (108) and determining that the wind farm (105) is disconnected from the utility grid (102) by identifying the predetermined electrical characteristics.
A method (100) of servicing or installing a component of a wind turbine (10) using a crane (50), the wind turbine (10) comprising a nacelle (16) and a rotor hub (20) coupled to the nacelle (16) and rotatable about a rotor axis, the method (100) comprising rotating the rotor hub (20) about the rotor axis to a first rotational position; lifting the crane (50) to the rotor hub (20) while the rotor hub (20) is positioned at the first rotational position; mounting the crane (50) to a mounting portion (21) of the rotor hub (20) while the rotor hub (20) is positioned at the first rotational position; and rotating the rotor hub (20) together with the crane (50) from the first rotational position to a second rotational position.
A method for operating a power generating plant having one or more power generating assets includes receiving, via a plurality of independent applications of a supervisory controller, a plurality of operational parameters relating to the one or more power generating assets in the power generating plant. The method also includes generating, via the plurality of independent applications of the supervisory controller, a plurality of marginal effect maps based on the plurality of operational parameters. The method further includes receiving, via a central optimizer module, the plurality of marginal effect maps from the plurality of independent applications and determining one or more operational setpoints for the power generating asset(s) based on the marginal effect maps to optimize an economic value of operating the one or more power generating assets. Moreover, the method includes communicating the operational setpoint(s) to the power generating asset(s).
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
8.
SYSTEMS AND METHODS FOR CONTROLLING A WIND TURBINE
Systems and methods are provided for the control of a wind turbine. Accordingly, a wind classification module of a controller determines a current aerodynamic state of the wind resource based, at least in part, on a current operational data set of the wind turbine. The current operational data set is indicative of a current operation of the wind turbine. A configuration intelligence module of the controller then generates an estimated configuration for a turbine estimator module and a predictive control configuration for a predictive control module based, at least in part, on the current aerodynamic state. An operation of the wind turbine is emulated via the turbine estimator module to generate a control initial state for the predictive control module. The predictive control module then determines a predicted performance of the wind turbine over a predictive interval based on the control initial state and the predictive control configuration. The predictive control module generates a set point for at least one actuator of the wind turbine based on the predicted performance, and an operating state of the wind turbine is affected via the at least one actuator in accordance with the setpoint.
The present disclosure is related to winding assemblies for an electrical machine. The winding assembly includes a plurality of winding bodies having insulated strands. The plurality of winding bodies includes a first winding body configured to be mounted around a base of the stator tooth, and a second winding body configured to be mounted closer to a distal end of the stator tooth. Further, the first and second winding bodies are electrically connected. Stator segments, and pole shoes comprising such winding assemblies are also provided. Methods for mounting a winding assembly to a stator tooth are also provided.
H02K 3/28 - Layout of windings or of connections between windings
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
The present disclosure is related to methods for detecting an imbalance in a wind turbine. The methods comprise receiving one or more movement signals from one or more sensors on the wind turbine. Further, the methods include determining an energy level of the movement signals at a rotor rotational speed frequency, and determining a rotor imbalance at least partially based on the determined energy level. The methods may also include comparing the energy level of the movement signals at the rotor rotational speed frequency with energy levels at the first natural frequency of the tower. A control system suitable for carrying out such methods and a wind turbine comprising such a control system are also provided.
A method for controlling an active harmonic filter of an inverter-based resource includes receiving, via a maximum compensation tracker module, a grid feedback signal, determining, via the maximum compensation tracker module, a phase shift signal based, at least in part, on the grid feedback signal, applying, via the maximum compensation tracker module, a phase shift offset signal to the phase shift signal to obtain a modified phase shift signal, determining, via the maximum compensation tracker module, a voltage reference signal for the active harmonic filter based, at least in part, on the grid feedback signal and the modified phase shift signal; and controlling, via the maximum compensation tracker module, the active harmonic filter using the voltage reference signal, wherein the phase shift offset signal ensures that the active harmonic filter injects a current substantially out of phase of a targeted harmonic.
A method for controlling a renewable energy power system having at least one renewable energy asset connected to a power grid includes receiving, via a controller, at least one of an actual power output of the renewable energy power system or a number of the plurality of renewable energy assets that are online. Further, the method includes determining, via the controller, an actual number of active harmonic filter banks in operation based on at least one of the actual power output and the number of the plurality of renewable energy assets that are online. Moreover, the method includes adjusting or maintaining, via the controller, the actual number of active harmonic filter banks in operation to maintain steady state reactive power capabilities of the renewable energy power system to meet reactive power-active power curve requirements for the renewable energy power system.
A method of assembling a coil support assembly for an electrical machine is provided. The method includes providing a plurality of coil support structures, each of the plurality of coil support structures having a first face defining a cavity and opposing sides each defining a joint component, the joint components being one of a male joint component or a female joint component. The method also includes arranging a conducting coil within the cavity of each of the plurality of coil support structures. The method also includes arranging the plurality of coil support structures together in a generally circumferential arrangement. The method also includes securing the plurality of coil support structures together via the male and female joint components of adjacent coil support structures of the plurality of coil support structures to form the coil support assembly.
H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 3/47 - Air-gap windings, i.e. iron-free windings
H02K 55/04 - Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type with rotating field windings
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
14.
COIL SUPPORT ASSEMBLY HAVING COIL SUPPORT STRUCTURES JOINED TOGETHER VIA RESPECTIVE JOINT STRUCTURES AND METHODS OF ASSEMBLING SAME
An electrical machine is provided. The electrical machine includes a coil support assembly including a plurality of coil support structures for receiving a plurality of conducting coils, the plurality of coil support structures arranged together in a generally circumferential arrangement. Each of the plurality of coil support structures includes a first face defining a cavity for receiving one of the plurality of conducting coils and opposing sides each including a joint component. Further, the joint components of adjacent coil support structures include corresponding male and female joint components secured together at a joint structure.
A thermal management system for a wind turbine includes at least one access door arranged adjacent to one or more components of the wind turbine that need cooling. The access door has at least one opening. The thermal management system also includes a filtration device arranged in the at least one opening. The filtration device includes at least one filter arranged in the at least one opening, at least one louver arranged adjacent to and external of the at least one filter, and at least one filter cover arranged adjacent to and external of the at least one louver. As such, the filter cover passively directs airflow through open sides of the filter cover to optimize cooling of the one or more components and to reduce dust particles from entering the wind turbine.
The present disclosure relates to methods for rotating a locked rotor of a wind turbine in case of an imbalance in a rotor plane of the rotor, comprising: rotating the rotor using an inching tool to apply torque on a drive train of the wind turbine to reduce the imbalance in the rotor plane; and removing a locking pin from a locking disc operatively connected to the rotor after reducing the imbalance in the rotor plane. The methods further comprise estimating a direction of a torque load due to the imbalance in the rotor plane using one or more sensors, and impeding the inching tool to apply torque on the drive train of the wind turbine in the estimated direction of the torque load due to the imbalance. The present disclosure further relates to inching tools and to methods for installing rotor blades on a hub of a wind turbine.
A hub assembly for a wind turbine includes a hub having a surface defining a first set of bolt holes and a shaft having a flange having a second set of bolt holes. The first set of bolt holes is aligned with the second set of bolt holes at a hub-shaft interface. The hub assembly also includes a plurality of hub bolts extending through the first and second sets of bolt holes at the hub-shaft interface, a plurality of washers with one of the plurality of washers extending around each of the plurality of hub bolts, and at least one spacer positioned between the surface of the hub and a subset of the plurality of washers. At least two of the plurality of hub bolts extend through the at least one spacer.
A method for reducing loads acting on a wind turbine includes determining, via a processor, at least one loading condition of the wind turbine resulting from a wind shear condition below a design threshold, determining, via the processor, a rotor speed setpoint of the wind turbine to cause an increase in thrust when the at least one loading condition exceeds a loading threshold; operating the wind turbine based on the rotor speed, and operating a rotor imbalance control module of the wind turbine to at least partially compensate for the at least one loading condition of the wind turbine resulting from the wind shear condition below the design threshold.
The present disclosure is related to methods for determining a thrust limit for a wind turbine and methods for operating a wind turbine. The methods comprise determining an operational state of a blade load monitoring system of the wind turbine. Additionally, the methods comprise adjusting a thrust threshold of the wind turbine at least partially based on the operational state of the blade monitoring system. Further, the methods also comprise operating the wind turbine such that a thrust load on a rotor of the wind turbine is maintained at or below the adjusted thrust threshold. A control system suitable to maintain thrust loads at or below a thrust threshold is also provided, as well as wind turbines including such a control system.
A method for controlling a wind farm having a plurality of wind turbines electrically connected to an electrical grid through a point of interconnection includes (a) determining, via a controller of the wind farm, a phase and an amplitude of individual power oscillations from each of the plurality of wind turbine power systems. The method also includes (b) determining, via the controller, a farm-level power oscillation for the wind farm based on the individual power oscillations from each of the plurality of wind turbine power systems. Further, the method includes (c) implementing, via the controller, a phase-shifting control scheme using the phases and the amplitudes of the individual power oscillations from each of the plurality of wind turbine power systems so as to maintain the farm-level power oscillation below a predetermined oscillation threshold.
The present disclosure relates to a current transfer element (100) configured to be mounted on a first component (300) of a machine, the machine comprising a second component (200) configured to rotate with respect to the first component and the second component comprising an electrical conductor. The current transfer element (100) comprises a floating conductor assembly, and a support (120), and the floating conductor assembly comprises a floating chassis (111) resiliently connected to the support (120), the floating chassis arranged on a roller (112) which is configured to contact the second component (200), and carrying a floating conductor (113) configured to transfer current from the electrical conductor of the second component (200). The present disclosure further relates to generators and electrical machines comprising floating conductor assemblies, and direct drive wind turbines comprising such generators.
The present disclosure is related to methods for determining a frequency of an oscillation mode of a wind turbine, comprising: determining a motion of a first mass of a first tuned mass damper in the wind turbine and deriving the frequency of the oscillation mode of the wind turbine at least partially based on the determined motion of the first mass. The present disclosure further relates to methods for operating a wind turbine, and to wind turbines, particularly offshore wind turbines, comprising tuned mass dampers.
The present disclosure is related to couplings for mechanically connecting an auxiliary component to a wind turbine tower. The couplings comprise a mounting bracket configured to be mounted on a shaft of the auxiliary component, and a tower interface configured to be arranged at an outside of the wind turbine tower and comprising a first fastener hole. The couplings further comprise a pad configured to be arranged at an inside of the wind turbine tower, and comprising a second fastener hole, wherein the first and the second fastener holes are configured to receive a fastener extending through a hole in the wind turbine tower to attach the auxiliary component to the wind turbine tower, and wherein the mounting bracket is configured to swivel about the shaft of the auxiliary component and is displaceable along a longitudinal axis of the shaft. The present disclosure further relates to methods for removing auxiliary components from a wind turbine.
F03D 80/80 - Arrangement of components within nacelles or towers
F16M 13/02 - Other supports for positioning apparatus or articlesMeans for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
24.
Pitch systems for blades of wind turbines and associated methods
The present disclosure is related to pitch systems for blades of wind turbines. The pitch system comprises a pitch bearing having a first bearing ring connected to a hub of the wind turbine, and a second bearing ring connected to a blade. The pitch system also includes an annular gear and a pitch drive having a motor, a gearbox, a main brake, and a pinion. In addition, the pitch system includes an auxiliary brake system comprising an auxiliary brake and an auxiliary pinion to engage with the annular gear, where the auxiliary brake is configured to switch between an active state, wherein braking forces are applied to the annular gear to maintain the blade in an instantaneous position, and an inactive state. The present disclosure further relates to wind turbines comprising such pitch systems and methods for applying an emergency pitch braking torque to a pitch system.
A method for controlling an inverter-based resource (IBR) connected to an electrical grid includes operating the IBR in a normal mode of operation. The method also includes receiving one or more electrical feedbacks and control signals. Further, the method includes determining whether the signals are indicative of an islanding condition occurring in the IBR. Moreover, upon the signals being indicative of the islanding condition, the method includes switching to an island mode of operation for the IBR. The island mode of operation includes continuously monitoring the signals, continuing operation of the IBR in the island mode of operation for as long as the signals indicate the islanding condition and an amount of loading is below at least one of available power or energy at the IBR. Further, the method includes reverting to the normal mode of operation when the signals indicate that the electrical grid is restored.
A crane assembly for erecting a tower from a plurality of tower sections includes a first telescopic mast connected to a second telescopic mast. A crane is mounted on top of the first telescopic mast. The first telescopic mast is configured to increase in length from a retracted state in a first direction and includes a first clamp assembly that selectively grips portions of the tower. The second telescopic mast is configured to increase in length from a retracted state in a second direction opposite to the first direction and includes a second clamp assembly that selectively grips portions of the tower.
B66C 23/20 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes with supporting couples provided by walls of buildings or like structures
A method for optimizing performance of a wind farm having at least one wind turbine includes maneuvering a first unmanned aerial vehicle (UAV) having at least one sensor to a first location near the at least one wind turbine of the wind farm; collecting, via the at least one sensor of the first UAV, data corresponding to one or more wind conditions at the at least one wind turbine; receiving the data corresponding to the one or more wind conditions at the at least one wind turbine via a controller; generating a control action for the at least one wind turbine using the data corresponding to the one or more wind condition at the at least one wind turbine; and implementing, via the controller, the control action.
A method for preventing damage in a bearing of a generator of an electrical power system having a power conversion assembly with a first converter coupled to a second converter, and the power conversion assembly electrically coupled to the generator. Further, the method includes monitoring a phase current and voltage of the first converter. The method also includes calculating a common mode power using the phase current and the voltage of the first converter. Moreover, the method includes comparing the common mode power to a predefined power threshold. The method also includes determining whether the common mode power is indicative of degradation in at least one of a bearing insulation or a ground brush based on the comparison of the common mode power to the predefined power threshold.
The present disclosure relates to methods for protecting one or more components of a wind turbine during yawing of the wind turbine. The present disclosure further relates to wind turbines. A method for protecting one or more components of a wind turbine during yawing of the wind turbine comprises monitoring one or more parameters indicative of a yaw torque required to position a wind turbine rotor with respect to a prevailing wind direction, detecting that one or more of the parameters indicative of yaw torque reach or exceed a predetermined threshold, and in response to the detection, reducing load imbalance in the wind turbine rotor.
A method for operating a power supply system connected to a grid, the power supply system including a rotor, a doubly-fed induction generator (DFIG), a power conversion assembly, and an active filter. The DFIG includes a generator rotor mechanically connected with the rotor and a generator stator. The power conversion assembly includes a rotor-side power converter. The active filter electrically connected with the generator stator via a stator bus and the rotor-side power converter electrically connected with the generator rotor via a rotor bus. Based on a rotor frequency of the generator rotor, the method determines an expected harmonic frequency for a stator current flowing on the stator bus. An amplitude of the stator current at the expected harmonic frequency is determined via a data set of stator current values. The method controls the active filter based on the amplitude of the stator current at the expected harmonic frequency.
H02P 9/10 - Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
F03D 9/25 - Wind motors characterised by the driven apparatus the apparatus being an electrical generator
H02P 9/00 - Arrangements for controlling electric generators for the purpose of obtaining a desired output
31.
SYSTEM AND METHOD FOR COORDINATED FREQUENCY RESPONSE OF AN INVERTER-BASED RESOURCE TO GRID FREQUENCY CHANGES
A system and method operate a renewable energy source having an inverter-based resource (IBR) system and controlled by a power converter controller. The IBR system is operated in grid-forming mode (GFM) control. The power converter controller receives a control signal that is derived based on a frequency droop function performed on a detected grid frequency at an upstream controller. The power converter controller generates an output power actuator signal based on a frequency droop function performed on the detected grid frequency at the power converter controller. A first compensation is applied to the upstream controller that reduces or eliminates changes in the control signal received by the power converter controller due to changes in the grid frequency.
A method of coordinating an inertial power response of a plurality of inverter-based resources in a power plant connected to an electrical grid includes receiving, via a plant-level controller of the power plant, at least one of a desired plant inertia or desired plant inertial power capability. The method also includes continuously, via the plant-level controller, determining and sending at least one of inertial power limits, virtual inertia settings, or an active power reference change to each of the plurality of inverter-based resources. Further, the method includes coordinating, via the plant-level controller, the inertial power response of the power plant to satisfy at least one of the desired plant inertia or the desired plant inertial power capability by allowing respective controllers of each of the plurality of inverter-based resources to independently respond to a grid frequency event up to the inertial power limits.
A method for monitoring damage of a slewing ring bearing of a wind turbine includes arranging at least one optical fiber sensor adjacent to or at least partially on at least one of an inner race or an outer race of the slewing ring bearing. Further, the method includes receiving, via a controller, signals from the at least one optical fiber sensor indicative of one or more changes associated with the slewing ring bearing. The method also includes comparing, via the controller, the one or more changes associated with the slewing ring bearing to a damage threshold. Moreover, the method includes implementing, via the controller, a control action when the one or more changes exceeds the damage threshold to prevent or minimize further damage from occurring to the slewing ring bearing.
A system for inspecting an offshore wind farm having one or more wind turbines includes an unmanned autonomous watercraft vessel. The unmanned autonomous watercraft vessel includes a positioning module for navigating the unmanned autonomous watercraft vessel to a wind turbine of interest in the offshore wind farm and positioning the unmanned autonomous watercraft vessel near the wind turbine of interest, an onboard data acquisition module comprising one or more sensors for collecting local data relating to health of the wind turbine of interest, and a controller comprising at least one processor. The processor(s) is configured to implement a plurality of operations, including, for example, receiving the local data from the one or more sensors and transporting the local data to a remote command center via a satellite communication link.
ERRERRERR) to generate a power angle command signal received by a voltage regulator; with the voltage regulator, generating an x-direction current command (IRCmdx) signal and a y-direction current command (IRCmdy) signal that are both received by a current regulator; and generating and adding a delta x-direction current (ΔIRx) component to the (IRCmdx) signal.
A method of synchronized blackstart in a power generating farm connected to an electrical grid includes selecting, at least, a subset of a plurality of inverter-based resources at the power generating farm having grid forming capability and an anchor power generating asset that are capable of contributing to the blackstart based on one or more parameters. The plurality of inverter-based resources are connected to the electrical grid via a transmission network. The method includes utilizing the grid forming capability of the subset of the plurality of inverter-based resources for initial start-up to bring the subset of the plurality of inverter-based resources online and form a plurality of islands, thereby partially re-energizing the transmission network and enabling restoration of one or more critical loads within a first time period during the blackstart. During a subsequent, second time period, the method includes further energizing the transmission network to fully restore the electrical grid to normal operation.
H02J 3/01 - Arrangements for reducing harmonics or ripples
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 11/00 - Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
A system and method are provided for controlling a wind turbine. A controller of the wind turbine detects a transient grid event and generates a first torque command via a drive‑train‑damper control module. The first torque command is configured to damp a torsional vibration resulting from the transient grid event. The controller also generates a second torque command via the drive-train-damper control module of the controller in response to the transient grid event. The second torque command is configured to minimize an error magnitude of power supplied to the power grid during a recovery phase immediately after the transient grid event. The controller further drives the generator to provide a first torque based on the first torque command for a first time period and drives the generator to provide a second torque based on the second torque command for a second time period.
A method for constraining grid frequency support of a wind turbine connected to an electrical grid to prevent a trip event in the wind turbine includes receiving, via a controller, one or more speed feedback signals from the wind turbine. Further, the method also includes adjusting, via the controller, one or more parameters of a power regulator of the wind turbine based on the one or more speed feedback signals such that a power output of the wind turbine is less sensitive to changes in at least one of grid frequency or phase angle.
A method of extending a predefined operating speed threshold of a grid-forming (GFM) inverter-based resource (IBR) connected to an electrical grid includes receiving a grid frequency signal of the electrical grid or a function thereof based on one or more grid frequency feedbacks. The method also includes determining a speed deviation based on the grid frequency signal of the electrical grid or the function thereof. Further, the method also includes combining the speed deviation with the predefined operating speed threshold of the GFM IBR, the predefined operating speed threshold of the GFM IBR being associated with a nominal grid frequency. Moreover, the method includes generating, via the controller, a new operating speed threshold for the GFM IBR using the speed deviation and the predefined operating speed threshold being associated with the nominal grid frequency. In addition, the method includes operating, via the controller, the GFM IBR using the new operating speed threshold.
H02P 9/00 - Arrangements for controlling electric generators for the purpose of obtaining a desired output
F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
H02P 9/10 - Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
The present disclosure relates to drive train assemblies for a wind turbine. These assemblies may comprise a rotor hub and a generator module. The generator module comprises a generator stator, and a stationary frame for supporting the generator stator. The generator further comprises a generator rotor, a shaft for supporting the generator rotor, and a bearing assembly for rotatably mounting the shaft on the stationary frame. The shaft is removably connected to the generator rotor, and the bearing assembly comprises a front bearing and a rear bearing. An upwind end of the generator module is attached to a downwind end of the rotor hub. The present disclosure further relates to wind turbines including such wind turbine assemblies and to methods for assembling drive train assemblies.
A method for controlling a power generating asset connected to an electrical grid includes receiving, via a controller, a grid power limit associated with one or more grid events occurring in the electrical grid. During the one or more grid events, the method includes implementing, via the controller, a power softening function. The power softening function includes increasing a power command of a generator above the grid power limit to avoid large changes in power of the generator, thereby reducing a likelihood of coupling slips of the drivetrain and diverting extra power generated during the one or more grid events to an energy buffer of the power converter based on an energy buffer power command, thereby maintaining a net power generated by the power generating asset within the grid power limit.
A superconducting circuit (100) for a superconducting magnet (23) includes a first temperature region, a second temperature region, at least one first component (23), at least one second component (121), and a field charging system (104, 118, 120). The first temperature region defines a first temperature. The second temperature region defines a second temperature, the second second temperature being higher than the first temperature. The at least one first component (23) is positioned within the first temperature region. The at least one second component (121) is positioned within the second temperature region. The field charging system includes at least one flexible connection (108, 110) electrically coupling the first component and the second component. The at least one flexible connection allows for displacement and motion between the first and second components due to thermal expansion and contraction caused by the different first and second temperatures.
A method for controlling a power generating asset connected to an electrical grid includes receiving, via a controller, a grid power target associated with an operating power level before one or more grid events occur in the electrical grid. The method also includes, during recovery from the one or more grid events, implementing, via the controller, a power diverter function. The power diverter function includes computing an expected grid power from at least one of the grid power target and a grid power limit, computing a power deviation between a power associated with the drivetrain and an expected grid power, and diverting at least a portion of the power deviation to an energy buffer to prevent the portion of the power deviation from reaching the electrical grid.
The present disclosure relates to wind turbine blades, devices and methods for reducing vibrations in wind turbines, particularly during installation. In an aspect, a device for mitigating vibrations of a blade of a wind turbine during standstill is provided. The device comprises a flexible base having a first connection area and a second connection area, the first connection area being configured to be attached to the second connection area to form a removable attachment. The device further comprises one or more airflow modifying elements attached to the flexible base. The flexible base is configured to fit around a portion of the rotor blade such that the removable attachment is positioned substantially at a leading edge of the blade. The present disclosure further relates to methods for mitigating vibrations in a parked wind turbine blade and to sleeves for wrapping around a portion of a wind turbine blade.
An electrical machine includes a shaft, a carrier structure arranged circumferentially around the shaft and defining a circumferential surface, a plurality of conducting coils secured to the carrier structure, and a cooling system. The cooling system includes an inlet manifold for providing a cooling fluid to the electrical machine, an outlet manifold for removing the cooling fluid from the electrical machine, and at least one passageway in fluid communication with the inlet manifold and the outlet manifold. The at least one passageway is arranged between two adjacent conducting coils of the plurality of conducting coils. The at least one passageway defines an inlet portion including a fluid inlet in fluid communication with the inlet manifold, an outlet portion including a fluid outlet in fluid communication with the outlet manifold, and a return portion arranged between the inlet portion and the outlet portion. The return portion defines a length such that the inlet portion and the outlet portion are arranged in contact with each other along respective lengths of the inlet and outlet portions so that a conductive potential of the at least one passageway is reduced.
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 55/02 - Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
47.
SYSTEM AND METHOD FOR DETECTING AND RESPONDING TO ROTOR BLADE DAMAGE IN A WIND TURBINE
A method for detecting and responding to damage in a rotor blade of a wind turbine includes monitoring at least one signal of a pitch actuator of a pitch system of the rotor blade of the wind turbine. The signal(s) is a proxy for a pitch driving torque of the pitch actuator of the pitch system. Thus, the method includes defining a metric that captures certain behavior of the proxy for the pitch driving torque of the pitch actuator of the pitch system. The method further includes comparing the metric to a corresponding metric associated with a reference rotor blade representing a healthy rotor blade. Moreover, the method includes implementing a control action when the metric is outside of a predetermined range defined by the healthy rotor blade.
A method for reducing power oscillations generated by a system of inverter-based resources and being injected into an electrical grid includes communicatively coupling a system-level energy buffer circuit with a system-level controller. The system-level controller communicatively is coupled to local controllers of the inverter-based resources. The method also includes generating, via the system-level energy buffer circuit, an energy buffer for the system of inverter-based resources. Further, the method includes applying the energy buffer to the power oscillations generated by the system of inverter-based resources so as to decouple the power oscillations generated by the system of inverter-based resources from a total output power of the system of inverter-based resources.
H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
H02J 3/01 - Arrangements for reducing harmonics or ripples
H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
49.
SYSTEM AND METHOD FOR DETECTING AND RESPONDING TO ROTOR BLADE DAMAGE IN A WIND TURBINE
A method for detecting and responding to damage in a rotor blade of a wind turbine includes monitoring at least one signal of a pitch actuator of a pitch system of the rotor blade of the wind turbine. The signal(s) is a proxy for a pitch driving torque of the pitch actuator of the pitch system. Thus, the method includes defining a metric that captures certain behavior of the proxy for the pitch driving torque of the pitch actuator of the pitch system. The method further includes comparing the metric to a corresponding metric associated with a reference rotor blade representing a healthy rotor blade. Moreover, the method includes implementing a control action when the metric is outside of a predetermined range defined by the healthy rotor blade.
F03D 17/00 - Monitoring or testing of wind motors, e.g. diagnostics
50.
System and method for operating a renewable energy source in grid-forming mode (GFM) as a virtual synchronous machine (VSM) with damper winding emulation
The present disclosure is related to methods (400; 500; 600) configured for detecting the state of a wind turbine blade (22). The methods (400; 500; 600) comprising receiving (401; 501) load signals from a wind turbine blade (22), determining (402; 503) an energy of the load signal in a first and second frequency and comparing (403; 504) said energy to generate a flag signal if the energy in the first frequency is smaller than the energy in the second frequency. A control system (600) suitable to detect the state of a wind turbine blade (22) is also provided, as well as wind turbines (10) including such a control system (600).
An electrical generator and method for operating the same are provided. Accordingly, the generator includes a non-rotatable component supporting a field winding assembly and a rotatable component oriented to rotate relative thereto. The generator also includes an armature winding assembly fixedly coupled to the rotatable component so as to rotate therewith during operation of the generator. The generator also includes a resistive assembly fixedly coupled to the rotatable component so as to rotate therewith during the operation of the generator. The resistive assembly electrically couples at least two separate phase windings of the armature winding assembly. The resistive assembly is also configured to introduce a resistance into the armature winding assembly in response to an electrical fault.
H01F 6/06 - Coils, e.g. winding, insulating, terminating or casing arrangements therefor
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 9/20 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
H02K 55/02 - Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type
F03D 9/25 - Wind motors characterised by the driven apparatus the apparatus being an electrical generator
54.
METHODS FOR FAST POWER RAMP UP, CONTROLLERS AND WIND TURBINES
The present disclosure relates to methods (100, 200) for ramping up the power output of a wind turbine (10). A method (100) comprises increasing (110) electric power output from an initial power value (61) at a first power ramp rate (63); and when reaching an intermediate power value (69), increasing (120) the electric power output to a target power value (59) at a second power ramp rate (67) different from the first power ramp rate (63). The intermediate power value (69) is the sum of the initial power value (61) and a predetermined power difference (71).
The present disclosure relates to methods (400, 500) for reducing vibrations in parked wind turbines (10), assemblies (82) comprising vibration mitigating devices (300) for wind turbine blades (22) and wind turbines (10). An assembly (82) comprises a vibration mitigating device (300) configured to be arranged around a wind turbine blade (22) of a wind turbine (10) and comprising one or more inflatable bodies (305) and one or more air flow modifying elements (310); and a pressure source (98) configured to inflate and/or deflate one or more of the one or more inflatable bodies (305) based on measurements of a sensor system (97) configured to monitor the wind turbine (10) and/or environmental conditions around the wind turbine (10).
The present disclosure is related to a device 100 configured for aligning a first hole 131 of a first flange 130 with a second hole 141 of a second flange 140. The device 100 comprises a base 101, a shaft 110 extending from the base 101 and a first and a second pusher 115, 116. The shaft 110 is configured to move between a retracted position and an extended position. The shaft 110 in the extended position extends from the first hole 131 into the second hole 141. The first and second pushers 115, 116 are also configured to be moved radially outwardly from the shaft 110 to exert pressure against an inner wall of the first and second holes 131, 141. Methods for aligning a first and a second hole 130, 140 are also provided.
B23P 19/12 - Alignment of parts for insertion into bores
B25B 27/16 - Hand tools or bench devices, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same abutted flanges
F03D 13/20 - Arrangements for mounting or supporting wind motorsMasts or towers for wind motors
F03D 13/10 - Assembly of wind motorsArrangements for erecting wind motors
The present disclosure relates to cabins (100) and methods (200, 300) for performing maintenance on wind turbines (10). A cabin (100) for performing maintenance on an uptower component (110) of a wind turbine (10) is provided. The cabin (100) is configured to support an operator and/or a tool inside the cabin (100). The cabin (100) is attachable to the wind turbine (10) such that it is rotatable with respect to the uptower component (110).
A superconducting machine includes at least one superconducting coil and a coil support structure arranged with the at least one superconducting coil. The coil support structure includes at least one composite component affixed to the at least one superconducting coil and an interface component in frictional contact with the at least one composite component so as to reduce a likelihood of quench of the at least one superconducting coil.
A method 100 for controlling a ramp rate of a wind park with a plurality of wind turbines, the method comprising: - determining 102 a generating pool of the wind park that includes wind turbines of the plurality of wind turbines that are online; - for each wind turbine in the generating pool, measuring and/or determining a first set of quantities of the wind turbine, the first set of quantities including at least an average wind speed value at the wind turbine; - based on the first set of quantities measured and/or determined for each wind turbine in the generating pool, determining a pre-shutdown pool that includes wind turbines of the generating pool for which the average wind speed value at the wind turbine exceeds a first wind speed threshold; - for each wind turbine in the pre-shutdown pool, measuring or determining a power of the wind turbine; - based on the power of the wind turbines in the pre-shutdown pool, computing 104 a total power of the pre-shutdown pool; - controlling the wind turbines of the generating pool of the wind park based on the total power of the pre-shutdown pool; - controlling the ramp rate of the wind park based at least in part on controlling the wind turbines of the generating pool of the wind park; wherein the controlling of the wind turbines of the generating pool is configured to limit and/or reduce the absolute value of the time derivative of the total power generated by the wind park below a predetermined upper bound of the absolute value of the time derivative of the total power generated by the wind park.
A method 100 for controlling a ramp rate of a wind park with a plurality of wind turbines, the method comprising:
determining 102 a generating pool of the wind park that includes wind turbines of the plurality of wind turbines that are online;
for each wind turbine in the generating pool, measuring and/or determining a first set of quantities of the wind turbine, the first set of quantities including at least an average wind speed value at the wind turbine;
based on the first set of quantities measured and/or determined for each wind turbine in the generating pool, determining a pre-shutdown pool that includes wind turbines of the generating pool for which the average wind speed value at the wind turbine exceeds a first wind speed threshold;
for each wind turbine in the pre-shutdown pool, measuring or determining a power of the wind turbine;
based on the power of the wind turbines in the pre-shutdown pool, computing 104 a total power of the pre-shutdown pool;
controlling the wind turbines of the generating pool of the wind park based on the total power of the pre-shutdown pool;
controlling the ramp rate of the wind park based at least in part on controlling the wind turbines of the generating pool of the wind park;
wherein the controlling of the wind turbines of the generating pool is configured to limit and/or reduce the absolute value of the time derivative of the total power
generated by the wind park below a predetermined upper bound of the absolute value of the time derivative of the total power generated by the wind park.
H02P 9/10 - Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
A lightning bypass system for a blade (22) of a wind turbine (10), the lightning bypass system comprising a blade connector (110) comprising an electrically insulating material (114) and configured to be located substantially in a rotational axis (R) of a blade root (24) of a wind turbine blade (22). The blade connector (110) is configured to be electrically connected to a down conductor cable (100) of the blade (22), and comprises a core configured to be electrically connected to a first end (111) and a second end (112) of the blade connector (110). The present disclosure further relates to methods for providing lightning bypass systems and to wind turbine hub assemblies comprising a lightning bypass system.
A method for detecting a failure condition in one or more components of a wind turbine is provided. The method includes actuating, via a controller, an impact device to generate a vibration having a vibration frequency and a vibration magnitude in the one or more components. The method further includes receiving data indicative of the vibration frequency and the vibration magnitude from a sensor communicatively coupled to the controller. The method further includes determining, via the controller, whether the data indicative of the vibration frequency and/or the vibration magnitude is outside of a predetermined vibration range for the one or more components.
F03D 17/00 - Monitoring or testing of wind motors, e.g. diagnostics
F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
G01N 3/34 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
The present disclosure relates to an assembly comprising a rotor hub, a generator rotor, and a shaft for supporting the generator rotor on a stationary frame, wherein the rotor hub is configured to be removable from the generator rotor and the shaft without disassembling the generator rotor from the shaft. The present disclosure further relates to methods for assembly.
The present disclosure is directed to methods for manufacturing a wind turbine slewing ring bearing having an integral stiffener configured to resist deformation of the bearing under a load. More specifically, the present disclosure is directed to methods for manufacturing components of a slewing ring bearing (e.g., an inner, center, and outer race) using near-net-shape (NNS) ring rolling techniques. In particular, the present disclosure is directed to methods for manufacturing slewing ring bearing races, via NNS ring rolling, that are not restricted to conventional (e.g., generally square, rectangular, quadrilateral, trapezoid, quadrilateral) cross- sectional profiles that necessitate attachment of a separate, non-integral stiffener (e.g., a non- integral stiffening plate, stiffening ring, or stiffening assembly).
The present invention discloses a blade root assembly for a wind turbine, the assembly comprising a blade with a root portion and a blade root flange. The blade root portion comprising a plurality of receptacles configured to receive fasteners to couple the blade root portion with a wind turbine rotor hub.
A method for controlling a wind turbine, and an associated wind turbine, includes receiving a wind direction signal indicative of an instantaneous wind direction at the wind turbine and receiving a signal indicative of an instantaneous wind speed at the wind turbine. A rate of change of the wind direction at the wind turbine and a rate of change of wind speed at the wind turbine are determined. A control signal for a pitch system for blades of the wind turbine is determined based on the rate of change of the wind direction and the rate of change of wind speed. The pitch of the blades is then changed with the pitch system based on the control signal to reduce loads on the wind turbine from changes in the wind direction simultaneous with changes in the wind speed.
A wind turbine has a main shaft line with a main shaft, a rotor hub, and a rotor lock plate having an opening for receiving a pin, and a nacelle having a bed plate. A multi-part main bearing has a housing, an inner ring, and an outer ring. A pin is moveable between a first, second, and third position, and is retracted from the opening in the first position so that the main shaft line is rotatable. The pin is inserted into the opening in the second position so that the main shaft line is not rotatable. In the third position, the pin is shifted and the main shaft line is supported by the pin such that the weight of shaft and loads on the main shaft are not transmitted through the multi-part main bearing but are transferred via the rotor lock plate and the pin to the bed plate.
A method (1000, 2000, 3000) for operating a wind turbine (100-100d) is disclosed. The wind turbine includes a power conversion system (114, 118, 210, 234, 410, 420, 430) configured to provide electrical output power (P) to a grid (242), and an air-cooling system (450) configured, in a cooling mode, to cool an ambient air (28a) and provide the cooled ambient air as a cooling air (28c) to the power conversion system (114, 118, 210, 234, 410, 420, 430). The method (1000, 2000, 3000) includes operating (1100, 2100, 3100) the air-cooling system (450) in the cooling mode if at least one operating parameter (APD, RPD, TGB, TBS) of the power conversion system (114, 118, 210, 234, 410, 420, 430) is equal to or greater than a respective threshold (Th1_APD, Th1_RPD, Th1_TGB, Th1_TBS).
A method (1000, 2000, 3000) for operating a wind turbine (100-100d) is disclosed. The wind turbine includes a power conversion system (114, 118, 210, 234, 410, 420, 430) configured to provide electrical output power (P) to a grid (242), and an air- cooling system (450) configured, in a cooling mode, to cool an ambient air (28a) and provide the cooled ambient air as a cooling air (28c) to the power conversion system (114, 118, 210, 234, 410, 420, 430). 1. ), The method (1000, 2000, 3000) includes operating (1100, 2100, 3100) the air-cooling system (450) in the cooling mode if at least one operating parameter (APD, RPD, TGB, TBS) of the power conversion system (114, 118, 210, 234, 410, 420, 430) is equal to or greater than a respective threshold (Thl APD, Th1 RPD, Thl TGB, Thl TBS).
A method (800,900) of assembling or disassembling a rotor blade of a wind turbine, the wind turbine comprising a tower, a nacelle mounted on the tower and a rotor coupled to the nacelle, the rotor having a rotor hub and a rotor blade, the rotor blade comprising a first blade segment connected with the rotor hub, a second blade segment, wherein the second blade segment is configured for joining to the first blade segment such that the second blade segment extends from the first blade segment towards a blade tip of the rotor blade, and a releasable locking device configured for joining the second blade segment to the first blade segment, the releasable locking device comprising a structural member of the second blade segment, the structural member being configured for engaging a further structural member of the first blade segment for releasable locking with the further structural member, wherein a fastening device of the second blade segment is arranged on the structural member; the method comprising raising (950) or lowering (860) the second blade segment using a connecting device fastened to the fastening device of the second blade segment, wherein the connecting device extends through a root of the rotor blade and at least partially through the first blade segment to the second blade segment.
The present disclosure relates to a wind turbine (10) comprising a wind turbine tower (15), a nacelle including a primary frame (110), wherein the primary frame is connected to the tower (15). The wind turbine further comprises a secondary structure (120) connected to the primary frame (110) and one or more flexible couplings (130) between the primary frame (110) and the secondary structure (120) configured to reduce transmission of deformations from the primary frame (110) to the secondary structure (120). The present disclosure also relates to secondary structures (120) configured to be connected to primary frames (110) and to methods (500) for refurbishing a secondary structure (120) of a wind turbine (10).
F03D 13/20 - Arrangements for mounting or supporting wind motorsMasts or towers for wind motors
F16F 15/08 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means with rubber springs
A rotor blade for a wind turbine includes a blade skin forming a suction surface and a pressure surface. An electric heating arrangement has a heating strip with a width-thickness relation configured to reduce bonding between ice and the blade skin by electrically heating a respective surface of the blade skin and to conduct lightning-strike currents of at least 10 kA. An energy transfer arrangement supplies electrical energy to the heating arrangement. An integrated lightning arrangement includes a lightning receptor mounted to a tip section of the blade and electrically connected to the heating strip such that the lightning strike is conducted from the lightning receptor to the heating strip. A grounding device is connected to a grounding arrangement of the wind turbine such that electrical energy of the lightning strike is conducted from the heating strip through the grounding device and into the grounding arrangement.
A multisiphon passive cooling system includes a heat exchanger thermally connected to a heat-generating component located within an enclosure, a distribution manifold located below the heat exchanger, a condensing unit located external to the enclosure and above the heat exchanger, and a first conduit thermally connected to the heat exchanger. The first conduit is fluidly connected to the distribution manifold and the condensing unit. The cooling system also includes a second conduit fluidly connected to the condensing unit and the distribution manifold, a liquid bridge fluidly connected to the first conduit and the second conduit or the distribution manifold, and a two-phase cooling medium that circulates through a loop defined by the first conduit, the liquid bridge, the condensing unit, the second conduit, the heat exchanger, and the distribution manifold. As such, the liquid bridge transfers the cooling medium in a liquid state from the first conduit to the second conduit or the distribution manifold.
A system and method are provided for determining deflection of a tower of a wind turbine, the wind turbine including a nacelle with a machine head and a rotor atop of the tower. A fixed location relative to the tower is established, and a total deflection of a geographic location ("geo-location") of the fixed location is determined. Components of the total deflection are determined that are generated by non-thrust loads acting on the tower. The non-thrust loads deflection components are subtracted from the total deflection to determine a thrust loads deflection component corresponding to deflection of the tower from operational thrust loads on the rotor.
G01B 21/06 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness specially adapted for measuring length or width of objects while moving
The present disclosure relates to wind turbines comprising a rotor 18 including one or more blades 20, a control module 110 configured to operate the wind turbine according to a first operational setpoint, determine an adjusted setpoint for the wind turbine at least partially based on vibrations in blades and transition to the adjusted setpoint. Further, the control module 110 is also configured to determine remaining vibrations in blades and determine a new setpoint for the wind turbine based on the remaining vibrations. The present disclosure further relates to methods for operating a wind turbine.
A main rotor shaft of a wind turbine configured to reducing contact pressure at a hub-joint connection includes a flanged portion and a rod portion. The flanged portion includes an outer circumferential edge, an outer radial area, and an inner radial area. The outer radial area includes holes placed around the outer radial area for attachment to a wind turbine hub. The outer circumferential edge includes a groove placed atop the outer circumferential edge. The rod portion is formed with the inner radial area and configured for connection to a gearbox of a wind turbine
F03D 80/00 - Details, components or accessories not provided for in groups
B23P 25/00 - Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress
F16D 1/033 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
F16D 1/076 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
77.
SYSTEM AND METHOD FOR MITIGATING SUB-SYNCHRONOUS OSCILLATIONS IN AN INVERTER-BASED RESOURCE
A method for mitigating sub-synchronous power oscillations in an inverter-based resource connected to an electrical grid via a series-compensated grid connection includes determining, via a controller, one or more rotor current commands for a power converter of the inverter-based resource. The method also includes applying, via a software module of the controller, at least one stator current component to the one or more rotor current commands to provide active damping to mitigate the sub-synchronous power oscillations in the inverter-based resource. Further, the method includes determining, via the controller, at least one voltage command for the inverter-based resource as a function of the one or more rotor current commands and the at least one stator current component. Moreover, the method includes controlling, via the controller, the inverter-based resource, based at least in part, on the voltage command.
The present disclosure relates to methods for operating wind turbines (10), in particular to methods for feeding wind turbine auxiliary systems when connection to the electrical grid (102) is lost. A method (100) comprises rotating a wind turbine rotor (18) at a first rotational speed by actively controlling a pitch angle of the plurality of rotor blades (22) while a safe condition is detected, and generating electric power; supplying at least part of the generated electric power to at least one wind turbine auxiliary system; detecting a specified condition; and in reply to the detection of the specified condition, rotating the wind turbine rotor (18) at a second rotational speed lower than the first rotational speed, and generating electric power.
A method for controlling wind farm operation during a weak grid condition includes determining when a threshold number of the plurality of wind turbines have tripped based on the received one or more inputs. Furthermore, the method includes determining a sampled power output of the wind farm based on received sensor data after it is determined that the threshold number of the plurality of wind turbines have tripped. Additionally, the method includes controlling the operation of the one or more wind turbines of the plurality of wind turbines that have not tripped after it is determined that the threshold number of the plurality of wind turbines have tripped such that the power output of the one or more wind turbines of the plurality of wind turbines that have not tripped is less than or equal to the sampled power output.
A wind turbine system and to a method for operating said system is disclosed. The system further comprises a detection device configured for detecting body waves generated by an earthquake. In one aspect, the present disclosure is directed to a system comprising a wind turbine, in particular to an onshore erected wind turbine, a wind turbine controller for controlling the wind turbine, and at least one detection device, which is connected to the wind turbine controller for transmitting signals. The wind turbine includes at least a rotor having at least one rotor blade, wherein the rotor is rotatably mounted to rotation support means of the wind turbine, and a tower having a top end for supporting the rotation support means and a support end. The detection device is configured to detect and measure earthquake generated primary waves (P-waves). The detection device may include at least one sensor or a plurality of sensors, wherein the sender is configured to detect and/or measure earthquake generated P-waves. Such sensor may be further configured to detect an acceleration caused by the earthquake using a built-in accelerometer and then to calculate and output a synthetic acceleration, and to provide an estimated Japan Meteorological Agency seismic intensity scale (shindo scale) value.
A lubrication system for a pitch bearing of a wind turbine includes a lubricant for lubricating contact surfaces between an outer race, an inner race, and a plurality of rolling elements of the pitch bearing. Further, the lubrication system includes a lubricant inlet formed into a first side of the inner race and an inlet seal for sealing the lubricant inlet so as to prevent the lubricant from leaking from the lubricant inlet. Moreover, the lubrication system includes a lubricant outlet formed into an opposing, second side of the inner race and a lubricant collection container arranged adjacent to and in fluid communication with the lubricant outlet and mounted to the inner race. Thus, during operation of the wind turbine, at least one of a slope of the pitch bearing, gravity, and a centrifugal effect cause the lubricant to flow throughout the pitch bearing to lubricate the contact surfaces without exiting a closed volume defined by the inlet seal(s) and the lubricant collection container(s).
A nacelle for a wind turbine, the nacelle comprising: a drivetrain with a drivetrain axis, at least two torque arms positioned around the drivetrain axis and attached to a member of the drivetrain, and a frame attached to a yaw bearing. The torque arms of the drive train are supported by the frame and at least one of the torque arms has an orientation deviating at least substantially from being horizontal.
A system and method are configured to monitor changes associated with an air gap in a brake assembly of a wind turbine yaw drive by: (1) receiving one or more sensor signals from one or more sensors that are indicative of changes associated with the air gap; and (2) comparing the changes associated with the air gap to certain thresholds to determine if the air gap is in need of attention. The system includes at least one proximity sensor arranged adjacent to the air gap, to monitor the air gap, and a controller. The controller is configured to receive the sensor signal(s) indicative of the changes associated with the air gap. The controller also is configured to compare the changes associated with the air gap to one or more air gap thresholds, and to implement a control action based on this comparison.
The present disclosure relates to electrical machines (100, 200) configured to be fed by pulse width modulation from a power converter (170) and comprising a stator (110), a rotor (120), a rotor shaft (130) and one or more bearings (140, 141) arranged between the rotor (120) and the stator (110). The electrical machine (100, 200) further comprising an electrical shunt (160, 161) arranged between the rotor shaft (130) and the stator (110). The present disclosure also relates to methods (500) to mitigate electrical discharge machining bearing currents in electrical machines (100, 200).
H02K 11/40 - Structural association with grounding devices
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
The present disclosure relates to electrical machines (100, 200) configured to be fed by pulse width modulation from a power converter (170) and comprising a stator (110), a rotor (120), a rotor shaft (130) and one or more bearings (140, 141) arranged between the rotor (120) and the stator (110). The electrical machine (100, 200) further comprising an electrical shunt (160, 161) arranged between the rotor shaft (130) and the stator (110). The present disclosure also relates to methods (500) to mitigate electrical discharge machining bearing currents in electrical machines (100, 200).
86.
Electrical power system having active harmonic filter
A method of mitigating high frequency harmonics in an output current of an electrical power system connected to a power grid includes providing an active harmonic filter in a stator power path connecting a stator of the generator to the power grid. Further, the method includes controlling, via a controller, the active harmonic filter to selectively extract a high frequency harmonic component from the output current. The method also includes determining, via the controller, whether the high frequency harmonic component is a positive sequence harmonic or a negative sequence harmonic. Moreover, the method includes compensating, via the controller, for the high frequency harmonic component based on whether the high frequency harmonic component is the positive sequence harmonic or the negative sequence harmonic to mitigate the high frequency harmonics in the output current.
A wind turbine blade includes a leading edge protection element attached to the leading edge of the wind turbine blade. The leading edge protection element extends in a longitudinal direction between an outboard end and an inboard end and includes an attachment surface mounted to an exterior surface of the blade, an exterior surface opposite the attachment surface, a first section extending from the leading edge and along a part of the pressure side of the wind turbine blade to a first transverse end at a first position on the pressure side of the blade, and a second section extending from the leading edge and along a part of the suction side of the wind turbine blade to a second transverse end at a second position on the suction side of the blade.
The present disclosure relates to methods for operating wind turbines (10) and charging one or more auxiliary power sources (84) for providing auxiliary power to one or more wind turbines (10). A method comprises pitching the wind turbine blades (22) to a predetermined idling pitch angle such that the wind turbine generator (42) produces power for charging one or more auxiliary power sources (84) above a predetermined wind speed. The method further comprises keeping the pitch angle (25) of the blades (22) at the idling pitch angle and charging the auxiliary power sources (84) when a prevailing wind speed reaches or exceeds the predetermined wind speed.
A system and method are provided for controlling a wind turbine of a wind farm. Accordingly, a controller prepares a yaw bias correction function based, at least in part, on a yaw offset function, and on wind speed measurement data and wind direction reference data of a wind event acting on at least a portion of the wind farm. The controller also applies the yaw bias correction function based at least in part on position data of a nacelle of the wind turbine, to yaw the nacelle of the wind turbine.
The present disclosure relates to wind turbine blades (22) configured to receive a peripheral device (250a, 250b, 250c) at a portion of the outer surface (211) of the blade (22), and wherein the wind turbine blade (22) is configured to magnetically couple to the peripheral device (250a, 250b, 250c). The present disclosure also relates to wind turbine blade assemblies (200) and methods (700) to provide the same.
c) which are electrically connectable with each other and a grid (510, 550) is disclosed. Each wind turbine includes a rotor (106) with rotor blades (108), a power conversion system (118, 210, 238) mechanically connected with the rotor (106), and at least one auxiliary subsystem (105, 109). The method includes operating the wind turbines of the string in an island operating mode in which the wind turbines are not connected with the grid, and the respective at least one auxiliary subsystem is supplied with electric power generated by the power conversion system of the respective wind turbine; detecting that the rotor of one of the wind turbines is exposed to a wind condition at which at least one of the rotor blades is at risk of stalling at the currently generated electric output power; and increasing the electric power generated by the power conversion system of the one of the wind turbines by an electric power amount which is sufficient for suppling the at least one auxiliary subsystem of at least one of the other wind turbines of the string.
F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
93.
System and method for controlling blade pitch on wind turbine rotor blades to reduce vibrations and limit loads in a locked condition of the turbine rotor
A proactive method and related wind turbine system are provided for reducing vibrations in the rotor blades when the rotor hub is locked against rotation. The method includes determining an initial blade orientation to wind direction and wind parameters for wind impacting the rotor blades. Based on the wind parameters and blade orientation, an angle of attack is determined for the rotor blades that will at least reduce vibrations expected to be induced in the blades from the current wind conditions. With a controller, the rotor blades are pitched to achieve the angle of attack using a pitch control system. The angle of attack is determined and the rotor blades are pitched from the initial blade orientation to the new angle of attack prior to vibrations being induced in the rotor blades.
F03D 17/00 - Monitoring or testing of wind motors, e.g. diagnostics
94.
SYSTEM AND METHOD FOR CONTROLLING BLADE PITCH ON WIND TURBINE ROTOR BLADES TO REDUCE VIBRATIONS AND LIMIT LOADS IN A LOCKED CONDITION OF THE TURBINE ROTOR
A proactive method and related wind turbine system are provided for reducing vibrations in the rotor blades when the rotor hub is locked against rotation. The method includes determining an initial blade orientation to wind direction and wind parameters for wind impacting the rotor blades. Based on the wind parameters and blade orientation, an angle of attack is determined for the rotor blades that will at least reduce vibrations expected to be induced in the blades from the current wind conditions. With a controller, the rotor blades are pitched to achieve the angle of attack using a pitch control system. The angle of attack is determined and the rotor blades are pitched from the initial blade orientation to the new angle of attack prior to vibrations being induced in the rotor blades.
A method for operating a wind farm having a string (S1-S3) of wind turbines (100-100d) which are electrically connectable with each other and a grid (510, 550) via power connections (Cab-Cd) is disclosed. Each wind turbine includes a rotor (106) with rotor blades (108), and a power conversion system (118, 210, 238) mechanically connected with the rotor (106). The method includes disconnecting the string (S1-S3) from the grid (510, 550), and identifying a primary wind turbine (100a, 100c) of the disconnected string (S1-S3) which is electrically connectable with at least one secondary wind turbine (100b-10d) of the disconnected string (S1-S3). The power conversion system (118, 210, 238) of the primary wind turbine (100a, 100c) includes a reactive power capability (RPC) that at least matches a reactive power (RP) of a cluster (C1, C11, C12) to be formed by electrically connecting the primary wind turbine (100a, 100c) with the at least one secondary wind turbine (100b-100d) of the disconnected string (S1-S3).
It is provided methods of installing a mechanical damper apparatus to an external surface of a tower of a wind turbine, the tower being in an erect state.
The present disclosure is directed to a method for responding to a friction coefficient signal of a pitch bearing of a pitch drive mechanism of a wind turbine and/or for controlling the pitch drive mechanism(s) and/or a bank of ultracapacitors. The method and system include: accessing high-frequency measurement data of the at least one pitch bearing; estimating, via a torque balance model implemented by a controller, a frictional torque of the at least one pitch bearing based, at least in part, on the high-frequency measurement data; estimating, via the controller, a friction coefficient signal of the at least one pitch bearing based, at least in part, on the frictional torque; comparing the friction coefficient signal with a friction threshold; determining whether the friction coefficient signal deviates from the friction threshold based, at least in part, on the comparison; and, if so, acting.
It is provided methods of installing a mechanical damper apparatus to an external surface of a tower of a wind turbine, the tower being in an erect state.
A method for operating a multi-level bridge power converter includes arranging a plurality of switching devices including at least four inner switching devices and at least two outer switching devices in an active neutral point clamped topology. The method also includes determining whether any of the switching devices is experiencing a failure condition by implementing a failure detection algorithm. The failure detection algorithm includes generating a blocking state logic signal by comparing a switching device voltage and a threshold reference voltage for each of the switching devices, determining an expected voltage blocking state for each of the switching devices based on gate drive signals of the switching devices and an output current direction, and detecting whether a failure condition is present in any of the switching devices based on the blocking state logic signals and the expected voltage blocking states of the switching devices.
