EP4153861A1 - Overload protection on wind power plants using strain sensors - Google Patents
Overload protection on wind power plants using strain sensorsInfo
- Publication number
- EP4153861A1 EP4153861A1 EP21726358.1A EP21726358A EP4153861A1 EP 4153861 A1 EP4153861 A1 EP 4153861A1 EP 21726358 A EP21726358 A EP 21726358A EP 4153861 A1 EP4153861 A1 EP 4153861A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor blade
- rotor
- wind
- generator
- strain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims description 31
- 238000005259 measurement Methods 0.000 claims description 17
- 230000001133 acceleration Effects 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 7
- 239000013307 optical fiber Substances 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
- F03D7/0288—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power in relation to clearance between the blade and the tower, i.e. preventing tower strike
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/322—Control parameters, e.g. input parameters the detection or prediction of a wind gust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/327—Rotor or generator speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/332—Maximum loads or fatigue criteria
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/80—Devices generating input signals, e.g. transducers, sensors, cameras or strain gauges
- F05B2270/808—Strain gauges; Load cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Definitions
- the present disclosure relates to methods for controlling a wind turbine and to wind turbines.
- methods according to the present disclosure relate to a control of a wind energy installation, at least one expansion being measured in the area of a blade root of a rotor blade of the wind energy installation.
- methods of the present disclosure relate to changing a pitch angle of a rotor blade of the wind energy installation, wherein in particular an overload of a generator and / or a converter of the wind energy installation is prevented.
- a wind turbine converts wind energy into electrical energy.
- the wind exerts a force on at least one rotor blade of a rotor of the wind energy installation, so that kinetic energy of the wind is converted into kinetic rotational energy of the rotor.
- the rotor drives an electrical generator that feeds electrical energy into an electricity network.
- the generator typically generates an alternating voltage.
- the force of the wind on the rotor blade varies over time, for example depending on wind gusts, wind strength and wind direction.
- both the generated electrical power and the frequency of the electrical voltage generated by the generator and / or the electrical current generated by the generator vary.
- variable frequency alternating voltage generated by the generator can be converted into a direct voltage in the converter, whereby an energy storage device, such as a capacitor, temporarily stores electrical energy based on the direct voltage, which in turn is used in the converter, for example to produce an output voltage / an output current to deliver at a constant frequency.
- an energy storage device such as a capacitor
- the converter can absorb almost all of the electrical energy from the generator with the variable frequency, feed energy in the energy storage device such as the intermediate storage capacitor based on the DC voltage generated, and feed electrical energy into the grid with the generation of alternating current at a constant frequency.
- the converter can be designed to feed part of the energy generated by the generator into the network or to conduct some of the energy to the generator.
- the total output voltage / the total output current of the wind turbine at the grid connection is a combination of the voltage generated by the generator / the current generated by the generator with a voltage / current generated by the converter, so that a constant frequency at the grid feed-in point can be guaranteed.
- the converter With the use of double-fed asynchronous generators, the converter can be dimensioned smaller, since only part of the total energy and total power flows through the converter.
- the converter and / or the generator of the wind energy installation can be overloaded. Too strong a wind and / or too strong a gust of wind causes an increase in the kinetic energy of the rotor of the wind energy installation, which in turn can cause an increase in the electrical power generated by the generator. This can damage the wind turbine generator. If the electrical power generated by the generator exceeds a limit value, the converter can also be damaged, for example if excessively high currents flow in the converter semiconductor elements. The kinetic energy of the rotor and / or the kinetic power that is transmitted from the rotor to the electrical generator and / or the electrical power generated by the generator and / or the power that flows through the converter must therefore be limited in order to cause damage avoid.
- the stated powers can be limited, for example, by setting a pitch angle of a rotor blade.
- the force that the wind exerts on the rotor blade can be reduced, so that the transmitted kinetic power is reduced. This reduces the rotational kinetic power of the rotor and the generator generates less electrical power. This prevents the generator and / or the converter from being overloaded.
- a method for controlling a wind energy installation with a rotor with at least one rotor blade comprising: measuring an expansion of the at least one
- a wind energy installation which comprises: a sensor for measuring a strain of at least one rotor blade of the wind energy installation; a control unit that is designed to change a pitch angle of the at least one rotor blade, based at least in part on a strain of the at least one rotor blade measured by the sensor; and wherein the control unit controls the wind turbine according to the above method
- FIG. 1 shows a wind turbine according to embodiments of the present disclosure.
- FIG. 2 shows a method for controlling a wind turbine according to the present disclosure.
- FIG. 1 shows a wind turbine according to embodiments of the present disclosure.
- the wind energy installation 10 comprises at least one rotor blade which drives a rotor 14.
- the wind collides with the rotor blade 17 and as a result a force acts on the rotor blade, which causes a torque of the rotor.
- This opposite torque can be a torque of an electric Be generator 16, which converts rotational kinetic energy into electrical energy, and / or a torque caused by friction.
- a wind turbine 10 can include a converter 12, which is used in particular to enable / generate an electrical alternating current with a constant frequency, based on the electrical alternating current / alternating voltage generated by the generator 16, which does not have a constant frequency because the wind does not have a constant Speed of the rotor 14 caused.
- a wind energy installation 10 can also contain an anemometer 11 and / or a control installation 13 which, in particular, can control or rain a pitch angle of the rotor blade 17.
- anemometer 11 and / or a control installation 13 which, in particular, can control or rain a pitch angle of the rotor blade 17.
- a torque of the generator 16 and / or a transmission ratio of the speed from the rotor 14 to the generator 16 can be changed, for example by setting a gear.
- the electrical power that can be obtained is limited for a given wind speed. If the wind speed is too high, the wind turbine can be damaged.
- the generator can be overloaded with kinetic power and / or the converter with electrical power, wherein overloading of the converter / generator in the present disclosure means that a maximum nominal power is exceeded, either towards the converter / generator and / or starting from Converter / generator.
- the wind energy installation 10, according to embodiments of the present disclosure, comprises at least one strain sensor 15 in a blade root of a rotor blade 17.
- An overload of the generator and / or the converter of a wind energy installation occurs when too much kinetic power is supplied from the rotor to the generator or when too much electrical power flows through the converter, which, for example, exceeds a maximum permissible nominal power.
- the rotational power of the rotor can increase sharply, which can possibly lead to an increase in the electrical power generated by the generator in a very short time, which can damage the generator and / or the converter can be damaged, for example by excessively high currents flowing in the semiconductor elements of the converter which, for example, exceed a maximum rated current of the semiconductor elements.
- a conventional control of the system based on the system's performance curve compares the currently generated output with a stored reference curve.
- the wind energy installation is controlled into a stable state by varying the pitch angle of the rotor blades. This regulation cannot effectively prevent an overload, since the variance of the pitch angle requires some time in which the power can increase further, which can damage the converter.
- An overload cannot be effectively prevented by measuring the wind intensity.
- local measurements for example using an anemometer in the wind turbine, are prone to errors.
- the field of wind intensity in the vicinity of the wind turbine can be irregular or turbulent, so that a local or punctual wind measurement is not suitable for drawing effective conclusions about the power that is transmitted from the wind to the rotor of the wind turbine, especially when Strong gusts of wind that change rapidly.
- a measurement of the entire wind field, for example with a LIDAR, in the vicinity of the wind turbine is time-consuming and conclusions about a possible overload can only be drawn indirectly through calculations and evaluations of the measured data.
- a measurement of the wind field at a greater distance, for example by a more distant LIDAR of a wind farm in which the wind turbine is located, is also unreliable, since especially with strong gusts the wind intensity and wind direction can differ locally or not exactly due to the measurement of the distant one Wind field can be determined. It is therefore necessary to measure or detect an increase in the wind power transmitted from the wind to the rotor, in particular to effectively prevent overloading of the converter or the generator, in particular without using an anemometer, anemometer or LIDAR.
- the bending moment is proportional to the measured elongation. If there is a jump in the elongation, the bending moment also changes abruptly.
- the elasticity of the rotor blade causes a delay between the expansion and a strong acceleration of the rotor. If the elongation exceeds a threshold value, it is possible, according to the present disclosure, to intervene quickly. Damage to the converter / generator, for example, can be prevented. Without intervention, damage can occur after 5 seconds due to overloading and damage to the converter. The rotor blade can be adjusted in 3s, but after the adjustment has started, the performance drops rapidly and the damage / overload is prevented in a timely manner.
- Measuring the deflection of the rotor blade makes it possible to effectively measure an increase in the kinetic power and energy of the rotor or to determine and / or detect it in advance with regard to the elasticity of the rotor blade and thereby enables an overload of the converter or the generator to be effectively prevented.
- At least one strain sensor 15 in the area of the blade root, an overload case can be detected earlier. Due to the Due to the inertia of the rotor, there is an increased deflection of the rotor blades even before the rotor accelerates and transfers the absorbed energy to the generator. If the information obtained by the at least one strain sensor 15 is used, the system can change the pitch angle of the rotor blades at an early stage and thus prevent the absorption of the overload.
- Strain sensors such as the strain sensor 15, are able to detect the increased deflection of the rotor blades even before the rotor itself accelerates and transfers the energy / power to the generator. In this way, the sensor system in the rotor blade detects the critical condition that occurs before the overload occurs. Previous methods, on the other hand, only take effect when the overload occurs and / or when the power on the generator is increased. By using strain sensors to prevent overload, more damage to the wind turbines can be prevented.
- a threshold value can be set for the strain sensors. If the threshold value is exceeded, the wind energy installation can either stop or be briefly transferred to a reduced operating state.
- the present disclosure measures or detects an increase in wind strength / wind speed with a time delay before the increase causes the overload would initiate without action.
- the time delay is sufficient to effectively prevent the overload that would otherwise occur by adjusting a pitch angle.
- the time delay is caused, for example, by the inertia of the rotor.
- One embodiment of the present disclosure is a method 200 (see FIG. 2) for controlling a wind energy installation with a rotor with at least one rotor blade, the method comprising: measuring 210 a strain of the at least one rotor blade; Changing 220 a pitch angle of the at least one rotor blade based at least partially on the measured expansion of the at least one rotor blade; wherein the measurement of the expansion of the at least one rotor blade measures at least one expansion in the area of a blade root of the rotor blade.
- the measurement of the expansion of the at least one rotor blade detects a deflection of the at least one rotor blade, which announces a near future acceleration of the rotor.
- the deflection is in particular an expansion of the rotor blade, for example at the blade root of the rotor blade, which exceeds a predetermined threshold value. So not every stretch is to be assessed as a deflection, but rather a stretch that exceeds a threshold value.
- the pitch angle of the at least one rotor blade is changed as soon as the deflection is detected, in order to prevent the immediate future acceleration of the rotor.
- changing the pitch angle prevents an overload of a generator and / or a converter of the wind energy installation by restricting the power that is transmitted from the rotor blade to the generator and / or the converter.
- the pitch angle of the rotor blade is changed in order to prevent a prompt future acceleration of the rotor, in particular to prevent the To prevent converter and / or the generator, in which the power remains limited, which is transmitted from the rotor blade to the converter and / or to the generator.
- Too high a wind speed for example with a gust of wind in a storm, would cause a higher elongation of the rotor blade and / or the rotor blade root, and a balance of the torques would arise with a higher torque of the generator, whereby a higher electrical power is generated by the generator which could, for example, damage the converter and / or damage the generator itself.
- a threshold value If the expansion of the rotor blade or the blade root exceeds a threshold value, then without taking any measures, a future overload of the converter and / or generator can be foreseen. If the threshold value is exceeded, the more the threshold value is exceeded, the faster the overload occurs.
- the threshold value can be defined, for example, as the supremum of the amount of elongation for which a maximum rated power of the electrical generator and / or a maximum rated power that flows through the converter will not be exceeded when the future equilibrium of the torques of the wind and the generator on the rotor occurs , in particular so that no damage occurs to the converter and / or generator.
- the threshold value can also be dependent on a current speed of the rotor. For example, high elongation of the rotor blade at high speed can be more critical than when the rotor is at a standstill or at low speed, since high elongation at high speed indicates a further increase in an already high output.
- the rotor blade is deflected in the sense of this disclosure. A deflection therefore always takes place when the expansion exceeds the threshold value, the threshold value either being constant or a function of the current speed of the rotor, possibly depending on other parameters of the wind turbine, such as a torque of the generator and / or a Transmission ratio of the speed between rotor and generator, an electrical load, etc.
- the measurement of the strain is carried out with a fiber-optic strain sensor 15, which is arranged in the blade root of the at least one rotor blade and which in particular contains a fiber Bragg grating.
- an elongation is measured for all rotor blades of the rotor blade and the changing of the pitch angle is based in particular on the measured elongation of all rotor blades.
- the changing of the pitch angle is additionally based on a power and / or a rotational speed of the rotor.
- the threshold value of the elongation of the blade root and, accordingly, the detection of the deflection of the rotor blade can be dependent on the rotational speed of the rotor.
- the threshold value of the elongation of the blade root and, accordingly, the detection of the deflection of the rotor blade can be independent of the rotational speed of the rotor, but the changing of the pitch angle is based at least in part on a power and / or a rotational speed of the rotor.
- the amount of change in the pitch angle can be greater if there is a higher power and / or a higher rotational speed of the rotor, with constant deflection, i.e. when a constant threshold value for the elongation of the blade root of the rotor blade is exceeded.
- the changing of the pitch angle is additionally based on a measured wind speed, in particular on a wind speed measured by an anemometer or lidar.
- the detection of the deflection and / or the exceeding of the threshold value can thus be supplemented with additional measurements in order to improve the predictive power of the overload. It is thus possible to differentiate whether a short gust of wind hits the rotor blade once or whether repeated violent gusts of wind are to be expected. A more differentiated decision can thus be made as to whether, for example, the wind energy installation should be regulated down or stopped.
- the measurement of the strain measures a strain between a first point and a distant second point on the rotor blade, between which an optical fiber is clamped, which includes, for example, a fiber Bragg grating.
- Some embodiments relate to a wind energy installation comprising: a sensor for measuring a strain of at least one rotor blade of the wind energy installation; A control unit which is designed to change a pitch angle of the at least one rotor blade, based at least in part on a strain of the at least one rotor blade measured by the sensor; and wherein the control unit controls the wind turbine according to the method of the present disclosure.
- Some embodiments relate to a wind park with at least one wind energy installation according to the present disclosure.
- fiber optic sensors such as fiber Bragg grating sensors
- the installation can be stopped or promptly controlled in order to effectively and advantageously avoid damage, for example to avoid overloading a converter and / or generator of the wind energy installation.
- Preventive intervention is made possible, whereas in the prior art there is only a reactive reaction to energy that has already been introduced.
- the present disclosure enables an effective and inexpensive control of each individual wind turbine, in particular in order to prevent damage to the individual wind turbine.
- strain sensors in particular the fiber Bragg grating sensors, are robust and durable, inexpensive and easy to attach.
- a lidar is associated with considerable costs and installing a lidar for each individual wind turbine is complex and cost-intensive.
- a lidar can also be imprecise as it collects wind data that is far away, whereas the actual local wind conditions are chaotic and difficult to determine can.
- the measurement of the strain in the area of the leaf root according to the present disclosure is accurate, effective, can be carried out in real time and is inexpensive.
- An expansion can also be measured for each individual rotor blade, whereas an anemometer, for example, can only carry out an imprecise local wind measurement for the wind energy installation as a whole. Even with a lidar, the elongation of individual rotor blades cannot be measured or recorded.
- the present disclosure thus enables more precise conclusions to be drawn about the torque of the rotor and / or impulsive accelerations of the rotor that can lead to overload and enables effective and timely intervention to prevent the overload or damage to the converter / generator, for example.
- strain sensors of the present disclosure for example optical waveguide sensors with fiber Bragg grating, are more robust and have a longer service life than anemometers and / or lidar sensors.
- the present disclosure does not require any complex models and / or abstractions and / or complex calibrations.
- a simple comparison with a threshold value is sufficient to measure / record an exact expansion and / or deflection in the root area of an individual rotor blade in order to be able to effectively prevent damage / overloads, for example on the converter and / or generator.
- a lidar is usually not part of a single wind turbine.
- the attachment of strain sensors is unproblematic and inexpensive, especially in comparison to the attachment of a lidar.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020113560.2A DE102020113560A1 (en) | 2020-05-19 | 2020-05-19 | Overload protection on wind turbines through the use of strain sensors |
PCT/EP2021/062266 WO2021233706A1 (en) | 2020-05-19 | 2021-05-10 | Overload protection on wind power plants using strain sensors |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4153861A1 true EP4153861A1 (en) | 2023-03-29 |
Family
ID=75977740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21726358.1A Pending EP4153861A1 (en) | 2020-05-19 | 2021-05-10 | Overload protection on wind power plants using strain sensors |
Country Status (8)
Country | Link |
---|---|
US (1) | US20240102447A1 (en) |
EP (1) | EP4153861A1 (en) |
JP (1) | JP2023525881A (en) |
CN (1) | CN115885104A (en) |
BR (1) | BR112022021116A2 (en) |
DE (1) | DE102020113560A1 (en) |
MX (1) | MX2022014437A (en) |
WO (1) | WO2021233706A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2479415A (en) * | 2010-04-09 | 2011-10-12 | Vestas Wind Sys As | Wind Turbine Independent Blade Control Outside The Rated Output |
WO2013091638A1 (en) * | 2011-12-20 | 2013-06-27 | Vestas Wind Systems A/S | Control method for a wind turbine, and wind turbine |
US9551321B2 (en) * | 2013-06-26 | 2017-01-24 | General Electric Company | System and method for controlling a wind turbine |
US10378512B2 (en) | 2013-07-30 | 2019-08-13 | Vestas Wind Systems A/S | Wind turbine operating method and device based on load and acceleration measurements in the blade |
US10451035B2 (en) * | 2017-05-04 | 2019-10-22 | General Electric Company | System and method for reducing wind turbine rotor blade loads |
-
2020
- 2020-05-19 DE DE102020113560.2A patent/DE102020113560A1/en active Pending
-
2021
- 2021-05-10 EP EP21726358.1A patent/EP4153861A1/en active Pending
- 2021-05-10 CN CN202180035985.XA patent/CN115885104A/en active Pending
- 2021-05-10 BR BR112022021116A patent/BR112022021116A2/en unknown
- 2021-05-10 WO PCT/EP2021/062266 patent/WO2021233706A1/en unknown
- 2021-05-10 JP JP2022569541A patent/JP2023525881A/en not_active Withdrawn
- 2021-05-10 MX MX2022014437A patent/MX2022014437A/en unknown
- 2021-05-10 US US17/918,205 patent/US20240102447A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2021233706A1 (en) | 2021-11-25 |
CN115885104A (en) | 2023-03-31 |
US20240102447A1 (en) | 2024-03-28 |
BR112022021116A2 (en) | 2022-12-06 |
MX2022014437A (en) | 2023-01-16 |
DE102020113560A1 (en) | 2021-11-25 |
JP2023525881A (en) | 2023-06-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102006054666B4 (en) | Vibration damping of a wind turbine | |
EP3112676B1 (en) | Method for operating a wind farm and wind farm | |
EP3420226B1 (en) | Method for determining an equivalent wind velocity | |
DE102004054608B4 (en) | Method for controlling a wind turbine and wind turbine with a rotor | |
EP2915999B1 (en) | Reduction of engine strain of a wind energy assembly | |
EP2017469B1 (en) | Method for operating a wind farm | |
EP2758659B1 (en) | Method for operating a wind power plant | |
EP3265675B1 (en) | Method for operating a wind turbine | |
EP1903214A2 (en) | Tower oscillation monitoring | |
EP3685036A1 (en) | Wind turbine and method for operating a wind turbine | |
DE102014100200A1 (en) | Method and device for operating a wind turbine | |
EP2948678B1 (en) | Method for adjusting the azimuth of a wind energy plant, azimuth adjustment system and wind energy plant | |
DE102008012956B4 (en) | Blattwinkelverstellratengrenzwertanpassung | |
WO2021233706A1 (en) | Overload protection on wind power plants using strain sensors | |
EP3495656A1 (en) | Method for determining the load dynamics of a wind power station | |
EP3839249A1 (en) | Method for adjusting a pitch angle of a rotor blade, control device for adjusting a pitch angle and wind turbine therefor | |
EP4012171B1 (en) | Method for adjusting at least one rotor blade of a wind turbine and system and wind turbine for carrying out the method | |
EP2923080A1 (en) | Method for operating a wind turbine, and wind turbine | |
DE102019118036A1 (en) | Method for determining a wind speed in the area of a wind energy installation and wind energy installation for carrying out the method | |
EP3176430B1 (en) | Method for monitoring a wind farm | |
WO2020109483A1 (en) | Method for operating a wind power plant |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20221129 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VC VIII POLYTECH HOLDING APS |