ABSTRACT
Abstract
A method for controlling operation of a floating wind turbine is described. The floating wind turbine includes a wind turbine generator coupled to a support tower. The method includes measuring a tower inclination, determining an operating parameter control value based on at least the measured tower inclination, and adjusting wind turbine operation based at least partially on the operating parameter control value.
Description
BACKGROUND OF THE INVENTION
The present disclosure relates generally to controlling operation of a wind turbine, and more specifically, to controlling operation of a floating wind turbine in response to changes in tower inclination.
Wind turbine generators utilize wind energy to produce electrical power. Wind turbine generators typically include a rotor having multiple blades that transform wind energy into rotational motion of a drive shaft, which in turn is utilized to drive an electrical generator to produce electrical power. Each of the multiple blades may be pitched to increase or decrease the rotational speed of the rotor. A power output of a wind turbine generator increases with wind speed until the wind speed reaches a rated wind speed for the turbine.
Typically, the wind turbine generator is positioned atop a vertical support tower, which is securely fixed to a surface, for example, land in a wind turbine field. Such an instillation maintains the rotor perpendicular to the ground. The wind turbine generator is rotatably mounted to the support tower such that the rotor may be rotated relative to the tower to maintain a perpendicular relationship between the rotor blades and the wind direction. Positioning wind turbine generators offshore enables the capture of wind energy from winds that are typically higher than winds over land. Offshore wind turbine generators typically include a tower securely fixed to a seabed in a similar manner to land-based wind turbine generators. For example, a portion of the tower may be buried within the seabed or coupled to a foundation buried within the seabed such that the tower is held in an upright position, perpendicular to a surface of the water. This type of instillation limits the use of offshore wind turbine generators due to a rapid increase in the depth of the oceans as a distance from land is increased. In other words, use of offshore wind turbine generators is typically limited to water depths of about twenty-five meters or less, which limits offshore wind turbine use to locations near the shore. Wind turbine generators that float in the water are known, however, stability issues may limit their use and/or the efficiency of such wind turbine generators.
BRIEF DESCRIPTION OF THE INVENTION
In one aspect, a method for controlling operation of a floating wind turbine is provided. The floating wind turbine includes a wind turbine generator coupled to a support tower. The method includes measuring a tower inclination, determining an operating parameter control value based on at least the measured tower inclination, and adjusting wind turbine operation based at least partially on the operating parameter control value.
In another aspect, a control system for controlling operation of a wind turbine is provided. The control system includes an inclination sensor configured to collect wind turbine tower inclination data and a processor communicatively coupled to the inclination sensor and configured to receive the wind turbine tower inclination data and to determine at least one operating parameter control value based at least partially on the wind turbine tower inclination data.
In yet another aspect, a floating wind turbine is provided. The floating wind turbine includes a tower configured to float in a body of water and a nacelle rotatably coupled to the tower. The floating wind turbine also includes a rotor that includes a plurality of rotor blades extending from a rotor hub. The rotor hub is coupled to an electric generator positioned at least partially in the nacelle. The wind turbine also includes an inclination sensor coupled to at least one of the nacelle and the tower. The inclination sensor is configured to determine an inclination of the tower. The wind turbine also includes a system controller configured to receive inclination data from the inclination sensor and to determine at least one operating parameter control value based at least partially on the inclination data.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a portion of an exemplary wind turbine.
FIG. 2 is a partially cut-away view of a portion of the wind turbine shown in FIG. 1 .
FIG. 3 is a block diagram of the wind turbine shown in
FIG. 1 .
FIG. 4 is a perspective view of an exemplary embodiment of a floating wind turbine.
FIG. 5 is a schematic diagram of a top view of the floating wind turbine shown in FIG. 4 .
FIG. 6 is a schematic diagram of a front view of the floating wind turbine shown in FIG. 4 .
FIG. 7 is a flow chart showing an exemplary method of controlling operation of the wind turbine shown in FIG. 4 .
DETAILED DESCRIPTION OF THE INVENTION
As used herein, the term âbladeâ is intended to be representative of any device that provides reactive force when in motion relative to a surrounding fluid. As used herein, the term âwind turbineâ is intended to be representative of any device that generates rotational energy from wind energy, and more specifically, converts kinetic energy of wind into mechanical energy. As used herein, the term âwind turbine generatorâ is intended to be representative of any wind turbine that generates electrical power from rotational energy generated from wind energy, and more specifically, converts mechanical energy converted from kinetic energy of wind to electrical power.
Technical effects of the methods, systems, and computer-readable media described herein include at least one of: (a) measuring a tower inclination; (b) determining an operating parameter control value based on at least the measured tower inclination; and (c) adjusting at least one of a blade pitch, a generator torque, and a nacelle yaw based on at least the operating parameter control value.
The methods, systems, and computer readable media described herein facilitate determining wind turbine operating parameters based on a measured tower inclination. Including a tower inclination measurement in operating parameter determinations facilitates maintaining a maximum wind swept area of a rotor included in a floating wind turbine, therefore, increasing an efficiency of the floating wind turbine. Furthermore, including a tower inclination measurement in operating parameter determinations may facilitate reducing a tower inclination angle of the floating wind turbine.
FIG. 1 is a perspective view of an exemplary wind turbine 10 . FIG. 2 is a partially cut-away perspective view of a portion of wind turbine 10 . Wind turbine 10 described and shown herein is a wind turbine generator for generating electrical power from wind energy. Moreover, wind turbine 10 described and illustrated herein includes a horizontal-axis configuration, however, in some embodiments, wind turbine 10 may include, in addition or alternative to the horizontal-axis configuration, a vertical-axis configuration (not shown). Wind turbine 10 may be coupled to an electrical load (not shown in FIG. 1 ), such as, but not limited to, a power grid, for receiving electrical power therefrom to drive operation of wind turbine 10 and/or its associated components and/or for supplying electrical power generated by wind turbine 10 thereto. Although only one wind turbine 10 is shown in FIGS. 1 and 2 , in some embodiments, a plurality of wind turbines 10 may be grouped together, sometimes referred to as a âwind farm.â
Wind turbine 10 includes a body or nacelle 12 and a rotor (generally designated by 14 ) coupled to nacelle 12 for rotation with respect to nacelle 12 about an axis of rotation 20 . In the exemplary embodiment, nacelle 12 is mounted on a tower 16 , however, in some embodiments, in addition or alternative to tower-mounted nacelle 12 , nacelle 12 may be positioned adjacent the ground and/or a surface of water. The height of tower 16 may be any suitable height enabling wind turbine 10 to function as described herein. Furthermore, wind turbine 10 may be securely fixed to a surface (i.e., the ground) such that tower 16 extends from the surface substantially parallel to a gravity vector (e.g., substantially normal to a surface of the earth). Wind turbine 10 may also be configured to float in a body of water, for example, configured such that a portion of tower 16 floats in or on a surface of water with a portion of tower 16 and nacelle 12 extending from the water.
Rotor 14 includes a hub 22 and a plurality of blades 24 (sometimes referred to as âairfoilsâ) extending radially outwardly from hub 22 for converting wind energy into rotational energy. Although rotor 14 is described and illustrated herein as having three blades 24 , rotor 14 may have any number of blades 24 . Blades 24 may each have any length that allows wind turbine 10 to function as described herein. For example, in some embodiments, one or more blades 24 are about one-half meter long, while in some embodiments one or more blades 24 are about fifty meters long. Other examples of blade 24 lengths include ten meters or less, about twenty meters, about thirty-seven meters, and about forty meters. Still other examples include blades between about fifty and about one-hundred meters long, and rotor blades greater than one-hundred meters long.
Despite how blades 24 are illustrated in FIG. 1 , rotor 14 may have blades 24 of any shape, and may have blades 24 of any type and/or any configuration, whether such shape, type, and/or configuration is described and/or illustrated herein. One example of another type, shape, and/or configuration of blades 24 is a Darrieus wind turbine, sometimes referred to as an âeggbeaterâ turbine. Yet another example of another type, shape, and/or configuration of blades 24 is a Savonious wind turbine. Moreover, wind turbine 10 may, in some embodiments, be a wind turbine wherein rotor
BACKGROUND OF THE INVENTION
The present disclosure relates generally to controlling operation of a wind turbine, and more specifically, to controlling operation of a floating wind turbine in response to changes in tower inclination.
Wind turbine generators utilize wind energy to produce electrical power. Wind turbine generators typically include a rotor having multiple blades that transform wind energy into rotational motion of a drive shaft, which in turn is utilized to drive an electrical generator to produce electrical power. Each of the multiple blades may be pitched to increase or decrease the rotational speed of the rotor. A power output of a wind turbine generator increases with wind speed until the wind speed reaches a rated wind speed for the turbine.
Typically, the wind turbine generator is positioned atop a vertical support tower, which is securely fixed to a surface, for example, land in a wind turbine field. Such an instillation maintains the rotor perpendicular to the ground. The wind turbine generator is rotatably mounted to the support tower such that the rotor may be rotated relative to the tower to maintain a perpendicular relationship between the rotor blades and the wind direction. Positioning wind turbine generators offshore enables the capture of wind energy from winds that are typically higher than winds over land. Offshore wind turbine generators typically include a tower securely fixed to a seabed in a similar manner to land-based wind turbine generators. For example, a portion of the tower may be buried within the seabed or coupled to a foundation buried within the seabed such that the tower is held in an upright position, perpendicular to a surface of the water. This type of instillation limits the use of offshore wind turbine generators due to a rapid increase in the depth of the oceans as a distance from land is increased. In other words, use of offshore wind turbine generators is typically limited to water depths of about twenty-five meters or less, which limits offshore wind turbine use to locations near the shore. Wind turbine generators that float in the water are known, however, stability issues may limit their use and/or the efficiency of such wind turbine generators.
BRIEF DESCRIPTION OF THE INVENTION
In one aspect, a method for controlling operation of a floating wind turbine is provided. The floating wind turbine includes a wind turbine generator coupled to a support tower. The method includes measuring a tower inclination, determining an operating parameter control value based on at least the measured tower inclination, and adjusting wind turbine operation based at least partially on the operating parameter control value.
In another aspect, a control system for controlling operation of a wind turbine is provided. The control system includes an inclination sensor configured to collect wind turbine tower inclination data and a processor communicatively coupled to the inclination sensor and configured to receive the wind turbine tower inclination data and to determine at least one operating parameter control value based at least partially on the wind turbine tower inclination data.
In yet another aspect, a floating wind turbine is provided. The floating wind turbine includes a tower configured to float in a body of water and a nacelle rotatably coupled to the tower. The floating wind turbine also includes a rotor that includes a plurality of rotor blades extending from a rotor hub. The rotor hub is coupled to an electric generator positioned at least partially in the nacelle. The wind turbine also includes an inclination sensor coupled to at least one of the nacelle and the tower. The inclination sensor is configured to determine an inclination of the tower. The wind turbine also includes a system controller configured to receive inclination data from the inclination sensor and to determine at least one operating parameter control value based at least partially on the inclination data.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a portion of an exemplary wind turbine.
FIG. 2 is a partially cut-away view of a portion of the wind turbine shown in FIG. 1 .
FIG. 3 is a block diagram of the wind turbine shown in
FIG. 1 .
FIG. 4 is a perspective view of an exemplary embodiment of a floating wind turbine.
FIG. 5 is a schematic diagram of a top view of the floating wind turbine shown in FIG. 4 .
FIG. 6 is a schematic diagram of a front view of the floating wind turbine shown in FIG. 4 .
FIG. 7 is a flow chart showing an exemplary method of controlling operation of the wind turbine shown in FIG. 4 .
DETAILED DESCRIPTION OF THE INVENTION
As used herein, the term âbladeâ is intended to be representative of any device that provides reactive force when in motion relative to a surrounding fluid. As used herein, the term âwind turbineâ is intended to be representative of any device that generates rotational energy from wind energy, and more specifically, converts kinetic energy of wind into mechanical energy. As used herein, the term âwind turbine generatorâ is intended to be representative of any wind turbine that generates electrical power from rotational energy generated from wind energy, and more specifically, converts mechanical energy converted from kinetic energy of wind to electrical power.
Technical effects of the methods, systems, and computer-readable media described herein include at least one of: (a) measuring a tower inclination; (b) determining an operating parameter control value based on at least the measured tower inclination; and (c) adjusting at least one of a blade pitch, a generator torque, and a nacelle yaw based on at least the operating parameter control value.
The methods, systems, and computer readable media described herein facilitate determining wind turbine operating parameters based on a measured tower inclination. Including a tower inclination measurement in operating parameter determinations facilitates maintaining a maximum wind swept area of a rotor included in a floating wind turbine, therefore, increasing an efficiency of the floating wind turbine. Furthermore, including a tower inclination measurement in operating parameter determinations may facilitate reducing a tower inclination angle of the floating wind turbine.
FIG. 1 is a perspective view of an exemplary wind turbine 10 . FIG. 2 is a partially cut-away perspective view of a portion of wind turbine 10 . Wind turbine 10 described and shown herein is a wind turbine generator for generating electrical power from wind energy. Moreover, wind turbine 10 described and illustrated herein includes a horizontal-axis configuration, however, in some embodiments, wind turbine 10 may include, in addition or alternative to the horizontal-axis configuration, a vertical-axis configuration (not shown). Wind turbine 10 may be coupled to an electrical load (not shown in FIG. 1 ), such as, but not limited to, a power grid, for receiving electrical power therefrom to drive operation of wind turbine 10 and/or its associated components and/or for supplying electrical power generated by wind turbine 10 thereto. Although only one wind turbine 10 is shown in FIGS. 1 and 2 , in some embodiments, a plurality of wind turbines 10 may be grouped together, sometimes referred to as a âwind farm.â
Wind turbine 10 includes a body or nacelle 12 and a rotor (generally designated by 14 ) coupled to nacelle 12 for rotation with respect to nacelle 12 about an axis of rotation 20 . In the exemplary embodiment, nacelle 12 is mounted on a tower 16 , however, in some embodiments, in addition or alternative to tower-mounted nacelle 12 , nacelle 12 may be positioned adjacent the ground and/or a surface of water. The height of tower 16 may be any suitable height enabling wind turbine 10 to function as described herein. Furthermore, wind turbine 10 may be securely fixed to a surface (i.e., the ground) such that tower 16 extends from the surface substantially parallel to a gravity vector (e.g., substantially normal to a surface of the earth). Wind turbine 10 may also be configured to float in a body of water, for example, configured such that a portion of tower 16 floats in or on a surface of water with a portion of tower 16 and nacelle 12 extending from the water.
Rotor 14 includes a hub 22 and a plurality of blades 24 (sometimes referred to as âairfoilsâ) extending radially outwardly from hub 22 for converting wind energy into rotational energy. Although rotor 14 is described and illustrated herein as having three blades 24 , rotor 14 may have any number of blades 24 . Blades 24 may each have any length that allows wind turbine 10 to function as described herein. For example, in some embodiments, one or more blades 24 are about one-half meter long, while in some embodiments one or more blades 24 are about fifty meters long. Other examples of blade 24 lengths include ten meters or less, about twenty meters, about thirty-seven meters, and about forty meters. Still other examples include blades between about fifty and about one-hundred meters long, and rotor blades greater than one-hundred meters long.
Despite how blades 24 are illustrated in FIG. 1 , rotor 14 may have blades 24 of any shape, and may have blades 24 of any type and/or any configuration, whether such shape, type, and/or configuration is described and/or illustrated herein. One example of another type, shape, and/or configuration of blades 24 is a Darrieus wind turbine, sometimes referred to as an âeggbeaterâ turbine. Yet another example of another type, shape, and/or configuration of blades 24 is a Savonious wind turbine. Moreover, wind turbine 10 may, in some embodiments, be a wind turbine wherein rotor 14 generally faces upwind to harness wind energy, and/or may be a wind turbine wherein rotor 14 generally faces downwind to harness energy.
Referring now to FIG. 2 , wind turbine 10 includes an electrical generator 26 coupled to rotor 14 for generating electrical power from the rotational energy generated by rotor 14 . Generator 26 may be any suitable type of electrical generator, such as, but not limited to, a wound rotor induction generator, a double-fed induction generator (DFIG, also known as dual-fed asynchronous generators), a permanent magnet (PM) synchronous generator, an electrically-excited synchronous generator, and a switched reluctance generator. Generator 26 includes a stator (not shown) and a rotor (not shown) with an air gap included therebetween. Rotor 14 includes a rotor shaft 28 coupled to rotor hub 22 for rotation therewith. Generator 26 is coupled to rotor shaft 28 such that rotation of rotor shaft 28 drives rotation of the generator rotor, and therefore operation of generator 26 . In the exemplary embodiment, the generator rotor has a generator shaft 30 coupled thereto and coupled to rotor shaft 28 such that rotation of rotor shaft 28 drives rotation of the generator rotor. In other embodiments, the generator rotor is directly coupled to rotor shaft 28 , sometimes referred to as a âdirect-drive wind turbine.â In the exemplary embodiment, generator shaft 30 is coupled to rotor shaft 28 through a gearbox 32 , although in other embodiments generator shaft 30 is coupled directly to rotor shaft 28 .
The torque of rotor 14 drives the generator rotor to thereby generate variable frequency AC electrical power from rotation of rotor 14 . Generator 26 has an air gap torque between the generator rotor and stator that opposes the torque of rotor 14 . A power conversion assembly 34 is coupled to generator 26 for converting the variable frequency AC to a fixed frequency AC for delivery to an electrical load (not shown in FIG. 2 ), such as, but not limited to, a power grid (not shown in FIG. 2 ) coupled to generator 26 . Power conversion assembly 34 may include a single frequency converter or a plurality of frequency converters configured to convert electricity generated by generator 26 to electricity suitable for delivery over the power grid. Power conversion assembly 34 may also be referred to herein as a frequency converter. Power conversion assembly 34 may be located anywhere within or remote to wind turbine 10 . For example, power conversion assembly 34 may be located within a base (not shown) of tower 16 .
In some embodiments, wind turbine 10 may include a rotor speed limiter, for example, but not limited to a disk brake 36 . Disk brake 36 brakes rotation of rotor 14 to, for example, slow rotation of rotor 14 , brake rotor 14 against full wind torque, and/or reduce the generation of electrical power from electrical generator 26 . Furthermore, in some embodiments, wind turbine 10 may include a yaw system 38 for rotating nacelle 12 about an axis of rotation 40 for changing a yaw of rotor 14 , and more specifically, for changing a direction faced by rotor 14 to adjust an angle between the direction faced by rotor 14 and a direction of wind 122 (shown in FIG. 4 ).
In the exemplary embodiment, wind turbine 10 includes a variable blade pitch system 42 for controlling (e.g., changing) the pitch angle of blades 24 (shown in FIGS. 1 and 2 ) with respect to a wind direction. A system controller 44 may be coupled to pitch system 42 to control operation of pitch system 42 . Pitch system 42 is coupled to hub 22 and blades 24 for changing the pitch angle of blades 24 by rotating blades 24 with respect to hub 22 . The pitch actuators may include any suitable structure, configuration, arrangement, means, and/or components, whether described and/or shown herein, such as, but not limited to, electrical motors, hydraulic cylinders, springs, and/or servomechanisms. Moreover, the pitch actuators may be driven by any suitable means, whether described and/or shown herein, such as, but not limited to, hydraulic fluid, electrical power, electro-chemical power, and/or mechanical power, such as, but not limited to, spring force.
FIG. 3 is a block diagram of an exemplary wind turbine 10 . In the exemplary embodiment, wind turbine 10 includes one or more system controllers 44 coupled to at least one component of wind turbine 10 for generally controlling operation of wind turbine 10 and/or controlling operation of the components thereof, regardless of whether such components are described and/or shown herein. For example, in the exemplary embodiment system controller 44 is coupled to pitch system 42 for generally controlling rotor 14 . In the exemplary embodiment, system controller 44 is mounted within nacelle 12 (shown in FIG. 2 ), however, additionally or alternatively, one or more system controllers 44 may be remote from nacelle 12 and/or other components of wind turbine 10 . System controllers 44 may be used for overall system monitoring and control including, without limitation, pitch and speed regulation, high-speed shaft and yaw brake application, yaw and pump motor application, and/or fault monitoring. Alternative distributed or centralized control architectures may be used in some embodiments.
In an exemplary embodiment, wind turbine 10 includes a plurality of sensors, for example, sensors 50 and/or 52 . Sensors 50 and/or 52 measure a variety of parameters including, without limitation, operating conditions and atmospheric conditions. For example, sensors 50 and/or 52 may measure, but are not limited to measuring, a wind speed, a wind direction, a rotational speed of rotor shaft 28 , and/or an electrical output of generator 26 . Each sensor
50 and 52 may be an individual sensor or may include a plurality of sensors. Sensors
50 and 52 may be any suitable sensor having any suitable location within or remote to wind turbine 10 that allows wind turbine 10 to function as described herein. In some embodiments, sensors 50 and/or 52 are coupled to system controller 44 for transmitting one or more measurement signals to system controller 44 for processing of the signals.
In the exemplary embodiment, wind turbine 10 also includes a tower inclination sensor 56 . For example, tower inclination sensor 56 may include, but is not limited to, an inclinometer and/or an acceleration sensor. Tower inclination sensor 56 measures an inclination angle 140 (shown in FIG. 4 ) and an inclination direction 138 (shown in FIG. 5 ). An output of tower inclination sensor 56 is provided to system controller 44 through a sensor interface 58 . In the exemplary embodiment, tower inclination sensor 56 is positioned on or within nacelle 12 , on or within tower 16 , and/or in any position on or within wind turbine 10 that allows tower inclination sensor 56 to function as described herein.
In some embodiments, system controller 44 includes a bus 62 or other communications device to communicate information. One or more processor(s) 64 are coupled to bus 62 to process information, including information from
sensors
50 , 52 , and 56 and/or other sensor(s). Processor(s) 64 may include at least one computer. As used herein, the term computer is not limited to integrated circuits referred to in the art as a computer, but broadly refers to a processor, a microcontroller, a microcomputer, a programmable logic controller (PLC), an application specific integrated circuit, and other programmable circuits, and these terms are used interchangeably herein.
System controller 44 may also include one or more random access memories (RAM) 66 and/or other storage device(s) 68 . RAM(s) 66 and storage device(s) 68 are coupled to bus 62 to store and transfer information and instructions to be executed by processor(s) 64 . RAM(s) 66 (and/or storage device(s) 68 , if included) can also be used to store temporary variables or other intermediate information during execution of instructions by processor(s) 64 . System controller 44 may also include one or more read only memories (ROM) 70 and/or other static storage devices coupled to bus 62 to store and provide static (i.e., non-changing) information and instructions to processor(s) 64 . Processor(s) 64 process information transmitted from a plurality of electrical and electronic devices that may include, without limitation, speed and power transducers. Instructions that are executed include, without limitation, resident conversion and/or comparator algorithms. The execution of sequences of instructions is not limited to any specific combination of hardware circuitry and software instructions.
System controller 44 may also include, or may be coupled to, input/output device(s) 72 . Input/output device(s) 72 may include any device known in the art to provide input data to system controller 44 and/or to provide outputs, such as, but not limited to, yaw control outputs, blade pitch control outputs, and/or frequency converter control outputs. Instructions may be provided to RAM 66 from storage device 68 including, for example, a magnetic disk, a read-only memory (ROM) integrated circuit, CD-ROM, and/or DVD, via a remote connection that is either wired or wireless providing access to one or more electronically-accessible media. In some embodiments, hard-wired circuitry can be used in place of or in combination with software instructions. Thus, execution of sequences of instructions is not limited to any specific combination of hardware circuitry and software instructions, whether described and/or shown herein. Also, in the exemplary embodiment, input/output device(s) 72 may include, without limitation, computer peripherals associated with an operator interface such as a mouse and a keyboard (neither shown in FIG. 3 ). Alternatively, other computer peripherals may also be used that may include, for example, a scanner (not shown in FIG. 3 ). Furthermore, in the exemplary embodiment, additional output channels may include, for example, an operator interface monitor (not shown in FIG. 3 ). System controller 44 may also include sensor interface 58 that allows system controller 44 to communicate with
sensors
50 , 52 , and 56 and/or other sensor(s). Sensor interface 58 may include one or more analog-to-digital converters that convert analog signals into digital signals that can be used by processor(s) 64 .
FIG. 4 is a perspective view of wind turbine 10 , wherein wind turbine 10 is a floating wind turbine. In the exemplary embodiment, tower 16 of floating wind turbine 10 is buoyant, and includes a weight at a bottom 110 of tower 16 that facilitates maintaining floating wind turbine 10 in an upright orientation (i.e., a portion of tower 16 and nacelle 12 extending upright from a surface 112 of the water). Floating wind turbine 10 may be anchored using an anchoring device 120 , for example, but not limited to a cable or a pole, to an underwater surface such as a seabed 130 to maintain a location and/or orientation of floating wind turbine 10 . Furthermore, in the exemplary embodiment, anchoring device 120 also facilitates electrically coupling wind turbine 10 to, for example, an electric grid (not shown in FIG. 4 ). An inclination of floating wind turbine 10 is effected by both wind and water current. The inclination is a vector that includes an inclination direction 138 (shown in FIG. 5 ) and an inclination angle 140 . In the exemplary embodiment, inclination direction 138 is measured relative to a reference direction 146 (shown in FIG. 5 ) and is described as an angle from reference direction 146 to a point on a circle 148 projected on a reference plane (e.g., surface 112 of water) that corresponds to the direction of tower inclination. For example, if tower 16 is inclined toward reference direction 146 , inclination direction 138 is zero degrees. Moreover, if tower 16 is inclined away from reference direction 146 , inclination direction 138 is one-hundred and eighty degrees. Reference direction 146 may be a predefined, fixed reference direction, or may correspond to a measured parameter, for example, wind direction 122 .
In the exemplary embodiment, inclination angle 140 is measured relative to a normal 150 to surface 112 . Inclination angle 140 describes the severity of the inclination compared to an ideal inclination (e.g., zero degrees). Furthermore, to describe the effect wind tower inclination may have on wind turbine 10 , an azimuth angle 152 (shown in FIG. 5 ) is defined as an angle from reference direction 146 to a point on circle 148 that corresponds to a direction that rotor 14 faces (e.g., axis of rotation 20 of rotor 14 ). As described above, yaw system 38 rotates nacelle 12 about axis of rotation 40 . For example, yaw system 38 may rotate nacelle 12 to change azimuth angle 152 from zero degrees to fifteen degrees as a reaction to a change in wind direction 122 . Typically, yaw system 38 maintains rotor 14 perpendicular to wind <figure-callout id="122" label="direction" filenames="US08022566-20110920-D00000.png,US08022566-20110920-D00004.png" state="{
CLAIMS
Claims ( 20 )
1. A method for controlling operation of a floating wind turbine, the floating wind turbine including a wind turbine generator coupled to a support tower, said method comprising:
measuring a tower inclination;
determining an operating parameter control value based on at least the measured tower inclination; and,
adjusting wind turbine operation based at least partially on the operating parameter control value.
2. A method in accordance with claim 1 , said method further comprising measuring a wind direction.
3. A method in accordance with claim 2 , the tower inclination including an inclination angle and an inclination direction, wherein adjusting wind turbine operation comprises adjusting at least one of a blade pitch, a generator torque, and a nacelle yaw based at least partially on the operating parameter control value and the wind direction.
4. A method in accordance with claim 3 , wherein adjusting at least one of the blade pitch and the generator torque comprises adjusting the blade pitch and the generator torque when the inclination direction is not perpendicular to the measured wind direction.
5. A method in accordance with claim 3 , wherein adjusting the blade pitch comprises increasing a blade angle if the inclination direction is toward the wind direction.
6. A method in accordance with claim 3 , wherein adjusting the blade pitch comprises decreasing a blade angle if the inclination direction is away from the wind direction.
7. A method in accordance with claim 3 , wherein adjusting the generator torque comprises increasing the generator torque if the inclination direction is toward the wind direction.
8. A method in accordance with claim 3 , wherein adjusting the generator torque comprises decreasing the generator torque if the inclination direction is away from the wind direction.
9. A method in accordance with claim 3 , wherein adjusting the nacelle yaw comprises adjusting the nacelle yaw when the tower inclination direction is neither perpendicular to the measured wind direction nor parallel to the measured wind direction.
10. A method in accordance with claim 9 , wherein adjusting the nacelle yaw comprises adjusting the nacelle yaw to maintain a maximum swept rotor area.
11. A method in accordance with claim 1 , wherein adjusting wind turbine operation comprises at least one of adjusting wind turbine operation in substantially real-time and adjusting wind turbine operation after a predefined delay from a measured change in tower inclination.
12. A control system for controlling operation of a wind turbine, said control system comprising:
an inclination sensor configured to collect wind turbine tower inclination data; and,
a processor communicatively coupled to said inclination sensor and configured to receive the wind turbine tower inclination data and to determine at least one operating parameter control value based at least partially on the wind turbine tower inclination data.
13. A control system in accordance with claim 12 , wherein said processor is further configured to control at least one of a blade pitch, a generator torque, and a nacelle yaw based on the operating parameter control value.
14. A control system in accordance with claim 12 , further comprising a wind direction sensor configured to provide wind direction data to said processor.
15. A control system in accordance with claim 14 , wherein said processor is further configured to control operation of at least one of a blade pitch control system, a frequency converter, and a yaw adjustment system based at least partially on the wind turbine tower inclination data and the wind direction data.
16. A floating wind turbine, comprising:
a tower configured to float in a body of water;
a nacelle rotatably coupled to said tower;
a rotor comprising a plurality of rotor blades extending from a rotor hub, said rotor hub coupled to an electric generator positioned at least partially in said nacelle;
an inclination sensor coupled to at least one of said nacelle and said tower, said inclination sensor configured to determine an inclination of said tower; and,
a system controller configured to receive inclination data from said inclination sensor and to determine at least one operating parameter control value based at least partially on the inclination data.
17. A floating wind turbine in accordance with claim 16 , wherein said system controller is further configured to control at least one of a blade pitch, a generator torque, and a nacelle yaw based on the operating parameter control value.
18. A floating wind turbine in accordance with claim 16 , further comprising a wind direction sensor configured to provide wind direction data to said system controller.
19. A floating wind turbine in accordance with claim 18 , wherein said system controller is configured to control operation of at least one of a blade pitch control system, a frequency converter, and a yaw adjustment system based at least partially on the inclination data and the wind direction data.
20. A floating wind turbine in accordance with claim 16 , wherein said system controller is configured to determine the operating parameter control value in at least one of substantially real-time and after a predefined delay from receipt of the tower inclination data.
US12/821,909
2010-06-23
2010-06-23
Methods and systems for operating a wind turbine
Active
US8022566B2
( en )
Priority Applications (2)
Application Number
Priority Date
Filing Date
Title
US12/821,909
US8022566B2
( en )
2010-06-23
2010-06-23
Methods and systems for operating a wind turbine
EP11170660.2A
EP2400153B1
( en )
2010-06-23
2011-06-21
Methods and systems for operating a wind turbine
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US12/821,909
US8022566B2
( en )
2010-06-23
2010-06-23
Methods and systems for operating a wind turbine
Publications (2)
Publication Number
Publication Date
US20110140420A1
US20110140420A1 ( en )
2011-06-16
US8022566B2
true
US8022566B2 ( en )
2011-09-20
Family
ID=44142066
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
US12/821,909
Active
US8022566B2
( en )
2010-06-23
2010-06-23
Methods and systems for operating a wind turbine
Country Status (2)
Country
Link
US
( 1 )
US8022566B2
( en )
EP
( 1 )
EP2400153B1
( en )
Cited By (25)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US20110006539A1
( en )
*
2007-11-19
2011-01-13
Windsea As
Floating Wind Power Apparatus
US20110148115A1
( en )
*
2008-08-18
2011-06-23
Samuel Roznitsky
Deep offshore floating wind turbine and method of deep offshore floating wind turbine assembly, transportation, installation and operation
US20110204636A1
( en )
*
2010-12-22
2011-08-25
Scholte-Wassink Hartmut
Wind turbine and operating same
US20110211951A1
( en )
*
2010-12-20
2011-09-01
Henk-Jan Kooijman
Apparatus and method for operation of an off-shore wind turbine
US20110210549A1
( en )
*
2010-12-15
2011-09-01
Christian Haag
System and methods for adjusting a yaw angle of a wind turbine
US20120098265A1
( en )
*
2009-04-24
2012-04-26
Hywind As
Extracting wave energy in a wind turbine installation
CN102785759A
( en )
*
2012-08-21
2012-11-21
æ±èç§æ大å¦
Forerake type floating fan mooring system
US8366389B2
( en )
*
2011-05-04
2013-02-05
General Electric Company
Methods and apparatus for controlling wind turbine thrust
US20130052015A1
( en )
*
2010-02-01
2013-02-28
Dag Velund
Arrangement and a method in connection with a floating wind turbine
US20130277984A1
( en )
*
2011-01-06
2013-10-24
Samuel Roznitsky
Hydrodynamic stabilization of a floating structure
US20140044541A1
( en )
*
2010-11-17
2014-02-13
Ideol
Installation and method for exploiting wind energy
US20140167421A1
( en )
*
2012-12-18
2014-06-19
IFP Energies Nouvelles
Offshore wind turbine on offset floating support
US20140175795A1
( en )
*
2012-12-26
2014-06-26
Mitsubishi Heavy Industries, Ltd.
Control system, method and program, and floating wind turbine generator provided therewith
US20140219796A1
( en )
*
2011-05-27
2014-08-07
Condor Wind Energy Limited
Wind turbine control system having a thrust sensor
US20140219797A1
( en )
*
2013-01-15
2014-08-07
Envision Energy (Denmark) Aps
Partial pitch wind turbine with floating foundation
US20150167646A1
( en )
*
2012-07-26
2015-06-18
Vestas Wind Systems As
Tilting wind turbine
US20150276786A1
( en )
*
2014-03-31
2015-10-01
Alstom Renewable Technologies
Yaw and pitch angles
US20150330362A1
( en )
*
2012-12-27
2015-11-19
Mhi Vestas Offshore Wind A/S
Method and device for controlling floating body wind turbine power generating apparatus, and floating body wind turbine power generating apparatus
US20160333848A1
( en )
*
2013-12-23
2016-11-17
Tidal Generation Limited
Water current power generation systems
US9499241B2
( en )
*
2013-06-27
2016-11-22
Alstom Renewable Technologies
Floating offshore structures
CN109026524A
( en )
*
2018-09-06
2018-12-18
æé³æºæ §è½æºéå¢è¡ä»½å ¬å¸
A variable-speed feathering shutdown control method for wind turbines
US20220154689A1
( en )
*
2019-03-01
2022-05-19
Wobben Properties Gmbh
Method for operating a wind turbine, controller, wind turbine and wind farm
US20230228244A1
( en )
*
2020-05-12
2023-07-20
Vestas Wind Systems A/S
Yaw system with yaw control based on control signal
US20230349363A1
( en )
*
2020-07-08
2023-11-02
Vestas Wind Systems A/S
Determining sunlight effect on wind turbine tower inclination using tower top accelerometers
US20240183334A1
( en )
*
2022-10-20
2024-06-06
The Regents Of The University Of Colorado, A Body Corporate
Robust multi-input multi-output control of floating offshore wind turbines
Families Citing this family (27)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE102007022705A1
( en )
*
2007-05-15
2008-11-20
Siemens Ag
Method for operating a wind farm with a plurality of wind turbines
DE102011053317A1
( en )
*
2011-09-06
2013-03-07
GL Garrad Hassan Deutschland GmbH
Method for determining the inclination of a tower
GB201117069D0
( en )
*
2011-10-04
2011-11-16
Tronic Ltd
.Installation method and system
JP6187935B2
( en )
*
2011-11-04
2017-08-30
å½ç«ç 究éçºæ³äºº æµ·ä¸ã»æ¸¯æ¹¾ã»èªç©ºæè¡ç 究æ
Control device for floating offshore wind power generation facility
WO2013110276A1
( en )
*
2012-01-23
2013-08-01
Vestas Wind Systems A/S
Coordinated control of a floating wind turbine
KR101722035B1
( en )
*
2012-08-07
2017-03-31
ì ìì´ì¹ìì´ ë² ì¤íì¤ ì¤íì¼ì´ ìë ìì´ï¼ìì¤
Floating Wind Turbine Safety System
GB201223088D0
( en )
2012-12-20
2013-02-06
Statoil Asa
Controlling motions of floating wind turbines
US10794692B2
( en )
2013-02-28
2020-10-06
Fnv Ip B.V.
Offshore positioning system and method
WO2014133381A1
( en )
*
2013-02-28
2014-09-04
Fugro N.V.
Offshore positioning system and method
JP6388759B2
( en )
*
2013-05-29
2018-09-12
ã¨ã ã¨ã¤ãã¢ã¤ ã´ã§ã¹ã¿ã¹ ãªãã·ã§ã¢ ã¦ã£ã³ã ã¨ã¼ï¼ã¨ã¹
Floating wind power generator
CN105452651A
( en )
2013-05-30
2016-03-30
è±éç»´æ¯å¡æ¯æµ·ä¸é£åæéå ¬å¸
Tilt damping of a floating wind turbine
US10344742B2
( en )
*
2015-04-23
2019-07-09
Continuum Dynamics, Inc.
Hybrid vertical/horizontal axis wind turbine for deep-water offshore installations
US10208734B2
( en )
2015-04-23
2019-02-19
Continuum Dynamics, Inc.
Lift-driven wind turbine with force canceling blade configuration
CN105484938B
( en )
2015-12-24
2018-11-23
å京éé£ç§åé£çµè®¾å¤æéå ¬å¸
Yaw control method and device of wind generating set
CN106837692B
( en )
*
2017-03-27
2018-10-26
ä¸æµ·çµæºå¦é¢
A kind of wind driven generator yaw system of vertical direction
TWI647386B
( en )
*
2017-12-22
2019-01-11
財åæ³äººè¹è¶æ¨æµ·æ´ç¢æ¥ç ç¼ä¸å¿
Offshore wind turbine support structure monitoring system and its operation method
CN109596175B
( en )
*
2018-12-28
2021-05-07
æ·±å³åæµ·æ §èç§æåå±æéå ¬å¸
Wind power tower cylinder slope and rock on-line monitoring system
ES2812374B2
( en )
*
2019-09-16
2022-02-17
Esteyco S A
CONTROL PROCEDURE OF A FLOATING TYPE OFFSHORE WIND TURBINE, AS WELL AS THE SYSTEM AND THE WIND TURBINE THAT INCORPORATES THIS PROCEDURE
US11199175B1
( en )
2020-11-09
2021-12-14
General Electric Company
Method and system for determining and tracking the top pivot point of a wind turbine tower
US11703033B2
( en )
2021-04-13
2023-07-18
General Electric Company
Method and system for determining yaw heading of a wind turbine
US11536250B1
( en )
2021-08-16
2022-12-27
General Electric Company
System and method for controlling a wind turbine
CN113915059B
( en )
*
2021-09-09
2023-03-14
æé³æºæ §è½æºéå¢è¡ä»½å ¬å¸
Vibration control method and system for tower of wind generating set
CN113864114B
( en )
*
2021-10-20
2022-05-31
ååçµå大å¦
Method, device and equipment for coordinating and controlling semi-submersible floating type fan and storage medium
US12066010B2
( en )
2022-04-04
2024-08-20
Ge Infrastructure Technology Llc
Method and system for determining and tracking wind turbine tower deflection
CN115434873B
( en )
*
2022-08-23
2025-06-13
åè½æ°è½æºè¡ä»½æéå ¬å¸
Offshore wind turbine tower tilt online monitoring system and method
CN116104694B
( en )
*
2023-03-07
2025-09-16
ä¸å½åè½éå¢æ¸ æ´è½æºææ¯ç 究é¢æéå ¬å¸
Method and device for controlling floating wind driven generator
CN118653968A
( en )
*
2024-06-28
2024-09-17
æ¹å森ç¹æºè½ææ¯æéå ¬å¸
A method for judging the inclination and deflection of wind turbine tower based on quadrants
Citations (10)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US6891280B2
( en )
*
2000-04-05
2005-05-10
Aerodyn Engineering Gmbh
Method for operating offshore wind turbine plants based on the frequency of their towers
US7075189B2
( en )
*
2002-03-08
2006-07-11
Ocean Wind Energy Systems
Offshore wind turbine with multiple wind rotors and floating system
US7156586B2
( en )
*
2003-01-06
2007-01-02
Vestas Wind Systems A/S
Wind turbine with floating foundation
US7156037B2
( en )
*
2002-05-22
2007-01-02
Sway As
Device for a wind power station placed in deep water
US7293960B2
( en )
*
2003-10-23
2007-11-13
Shigeyuki Yamamoto
Power generation assemblies, and apparatus for use therewith
US7296971B2
( en )
*
2003-04-28
2007-11-20
Sway As
Wind power station
USD567176S1
( en )
2005-11-03
2008-04-22
Eystein Borgen
Floating wind turbine tower
US20080260514A1
( en )
2005-11-01
2008-10-23
Statoilhydro Asa
Method for Damping Tower Vibrations in a Wind Turbine Installation
US7456515B2
( en )
*
2003-08-27
2008-11-25
Norsk Hydro Asa
Wind turbine for use offshore
US20090091136A1
( en )
2007-10-08
2009-04-09
Viterna Larry A
Floating wind turbine system
Family Cites Families (5)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO2007089136A2
( en )
*
2006-02-03
2007-08-09
Pantheon Bv
Wind turbine tower vibration damping
GB2442719A
( en )
*
2006-10-10
2008-04-16
Iti Scotland Ltd
Wave and wind power generation system
ES2528743T3
( en )
*
2008-04-02
2015-02-12
Siemens Aktiengesellschaft
Vibration damping method of a wind turbine tower and control system for wind turbines
PL2727813T3
( en )
*
2008-04-23
2018-07-31
Principle Power, Inc.
Column-stabilized offshore platform with water-entrapment plates and asymmetric mooring system for support of offshore wind turbines
US7772713B2
( en )
*
2009-09-30
2010-08-10
General Electric Company
Method and system for controlling a wind turbine
2010
2010-06-23
US
US12/821,909
patent/US8022566B2/en
active
Active
2011
2011-06-21
EP
EP11170660.2A
patent/EP2400153B1/en
active
Active
Patent Citations (11)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US6891280B2
( en )
*
2000-04-05
2005-05-10
Aerodyn Engineering Gmbh
Method for operating offshore wind turbine plants based on the frequency of their towers
US7075189B2
( en )
*
2002-03-08
2006-07-11
Ocean Wind Energy Systems
Offshore wind turbine with multiple wind rotors and floating system
US7156037B2
( en )
*
2002-05-22
2007-01-02
Sway As
Device for a wind power station placed in deep water
US7156586B2
( en )
*
2003-01-06
2007-01-02
Vestas Wind Systems A/S
Wind turbine with floating foundation
US7296971B2
( en )
*
2003-04-28
2007-11-20
Sway As
Wind power station
US7456515B2
( en )
*
2003-08-27
2008-11-25
Norsk Hydro Asa
Wind turbine for use offshore
US7293960B2
( en )
*
2003-10-23
2007-11-13
Shigeyuki Yamamoto
Power generation assemblies, and apparatus for use therewith
US20080260514A1
( en )
2005-11-01
2008-10-23
Statoilhydro Asa
Method for Damping Tower Vibrations in a Wind Turbine Installation
USD567176S1
( en )
2005-11-03
2008-04-22
Eystein Borgen
Floating wind turbine tower
US20090091136A1
( en )
2007-10-08
2009-04-09
Viterna Larry A
Floating wind turbine system
US7612462B2
( en )
*
2007-10-08
2009-11-03
Viterna Larry A
Floating wind turbine system
Non-Patent Citations (2)
* Cited by examiner, â Cited by third party
Title
Siemens Research News, " New Project for Eco-Electricity Charging Stations ", one page.
Sway Web Page, " Changing the Future of Wind Power ", one page.
Cited By (47)
* Cited by examiner, â Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US20110006539A1
( en )
*
2007-11-19
2011-01-13
Windsea As
Floating Wind Power Apparatus
US8471399B2
( en )
*
2007-11-19
2013-06-25
Windsea As
Floating wind power apparatus
US8169099B2
( en )
*
2008-08-18
2012-05-01
Samuel Roznitsky
Deep offshore floating wind turbine and method of deep offshore floating wind turbine assembly, transportation, installation and operation
US20110148115A1
( en )
*
2008-08-18
2011-06-23
Samuel Roznitsky
Deep offshore floating wind turbine and method of deep offshore floating wind turbine assembly, transportation, installation and operation
US9702344B2
( en )
*
2009-04-24
2017-07-11
Hywind As
Control method for a floating wind turbine
US20120098265A1
( en )
*
2009-04-24
2012-04-26
Hywind As
Extracting wave energy in a wind turbine installation
US20130052015A1
( en )
*
2010-02-01
2013-02-28
Dag Velund
Arrangement and a method in connection with a floating wind turbine
US20140044541A1
( en )
*
2010-11-17
2014-02-13
Ideol
Installation and method for exploiting wind energy
US9670908B2
( en )
*
2010-11-17
2017-06-06
Ideol
Installation and method for exploiting wind energy
US20110210549A1
( en )
*
2010-12-15
2011-09-01
Christian Haag
System and methods for adjusting a yaw angle of a wind turbine
US8178989B2
( en )
*
2010-12-15
2012-05-15
General Electric Company
System and methods for adjusting a yaw angle of a wind turbine
US20110211951A1
( en )
*
2010-12-20
2011-09-01
Henk-Jan Kooijman
Apparatus and method for operation of an off-shore wind turbine
US8215896B2
( en )
*
2010-12-20
2012-07-10
General Electric Company
Apparatus and method for operation of an off-shore wind turbine
US20110204636A1
( en )
*
2010-12-22
2011-08-25
Scholte-Wassink Hartmut
Wind turbine and operating same
US8169098B2
( en )
*
2010-12-22
2012-05-01
General Electric Company
Wind turbine and operating same
US20130277984A1
( en )
*
2011-01-06
2013-10-24
Samuel Roznitsky
Hydrodynamic stabilization of a floating structure
US8829705B2
( en )
*
2011-01-06
2014-09-09
Samuel Roznitsky
Hydrodynamic stabilization of a floating structure
US8366389B2
( en )
*
2011-05-04
2013-02-05
General Electric Company
Methods and apparatus for controlling wind turbine thrust
US20140219796A1
( en )
*
2011-05-27
2014-08-07
Condor Wind Energy Limited
Wind turbine control system having a thrust sensor
US10495060B2
( en )
*
2011-05-27
2019-12-03
Seawind Ocean Technology Holding Bv
Wind turbine control system having a thrust sensor
US9909569B2
( en )
*
2012-07-26
2018-03-06
Vestas Wind Systems A/S
Tilting wind turbine
US20150167646A1
( en )
*
2012-07-26
2015-06-18
Vestas Wind Systems As
Tilting wind turbine
CN102785759B
( en )
*
2012-08-21
2015-05-13
æ±èç§æ大å¦
Forerake type floating fan mooring system
CN102785759A
( en )
*
2012-08-21
2012-11-21
æ±èç§æ大å¦
Forerake type floating fan mooring system
US20140167421A1
( en )
*
2012-12-18
2014-06-19
IFP Energies Nouvelles
Offshore wind turbine on offset floating support
US11181098B2
( en )
*
2012-12-18
2021-11-23
IFP Energies Nouvelles
Offshore wind turbine on offset floating support
US8922042B2
( en )
*
2012-12-26
2014-12-30
Mhi Vestas Offshore Wind A/S
Control system, method and program, and floating wind turbine generator provided therewith
US20140175795A1
( en )
*
2012-12-26
2014-06-26
Mitsubishi Heavy Industries, Ltd.
Control system, method and program, and floating wind turbine generator provided therewith
US10544777B2
( en )
2012-12-27
2020-01-28
Mhi Vestas Offshore Wind A/S
Method and device for controlling floating body wind turbine power generating apparatus, and floating body wind turbine power generating apparatus
US20150330362A1
( en )
*
2012-12-27
2015-11-19
Mhi Vestas Offshore Wind A/S
Method and device for controlling floating body wind turbine power generating apparatus, and floating body wind turbine power generating apparatus
US10024303B2
( en )
*
2012-12-27
2018-07-17
Mhi Vestas Offshore Wind A/S
Method and device for controlling floating body wind turbine power generating apparatus, and floating body wind turbine power generating apparatus
US20140219797A1
( en )
*
2013-01-15
2014-08-07
Envision Energy (Denmark) Aps
Partial pitch wind turbine with floating foundation
US9732730B2
( en )
*
2013-01-15
2017-08-15
Envision Energy (Denmark) Aps
Partial pitch wind turbine with floating foundation
US9499241B2
( en )
*
2013-06-27
2016-11-22
Alstom Renewable Technologies
Floating offshore structures
US10767620B2
( en )
*
2013-12-23
2020-09-08
Ge Energy (Uk) Limited
Water current power generation systems
US20160333848A1
( en )
*
2013-12-23
2016-11-17
Tidal Generation Limited
Water current power generation systems
US9372201B2
( en )
*
2014-03-31
2016-06-21
Alstom Renewable Technologies
Yaw and pitch angles
US20150276786A1
( en )
*
2014-03-31
2015-10-01
Alstom Renewable Technologies
Yaw and pitch angles
CN109026524B
( en )
*
2018-09-06
2019-08-30
æé³æºæ §è½æºéå¢è¡ä»½å ¬å¸
Variable-rate feathering shutdown control method for wind generating set
CN109026524A
( en )
*
2018-09-06
2018-12-18
æé³æºæ §è½æºéå¢è¡ä»½å ¬å¸
A variable-speed feathering shutdown control method for wind turbines
US20220154689A1
( en )
*
2019-03-01
2022-05-19
Wobben Properties Gmbh
Method for operating a wind turbine, controller, wind turbine and wind farm
US11815066B2
( en )
*
2019-03-01
2023-11-14
Wobben Properties Gmbh
Method for operating a wind turbine, controller, wind turbine and wind farm
US20230228244A1
( en )
*
2020-05-12
2023-07-20
Vestas Wind Systems A/S
Yaw system with yaw control based on control signal
US12044211B2
( en )
*
2020-05-12
2024-07-23
Vestas Wind Systems A/S
Yaw system with yaw control based on control signal
US20230349363A1
( en )
*
2020-07-08
2023-11-02
Vestas Wind Systems A/S
<td itemprop="tit