WO2012149984A1 - System and method for operating a wind turbine using an adaptive speed reference - Google Patents

System and method for operating a wind turbine using an adaptive speed reference Download PDF

Info

Publication number
WO2012149984A1
WO2012149984A1 PCT/EP2011/065796 EP2011065796W WO2012149984A1 WO 2012149984 A1 WO2012149984 A1 WO 2012149984A1 EP 2011065796 W EP2011065796 W EP 2011065796W WO 2012149984 A1 WO2012149984 A1 WO 2012149984A1
Authority
WO
WIPO (PCT)
Prior art keywords
wind turbine
wind
rotor speed
operating
turbine rotor
Prior art date
Application number
PCT/EP2011/065796
Other languages
French (fr)
Inventor
Martin Huus Bjerge
Thomas Esbensen
Ib Frydendal
Gustav Hoegh
Ramakrishnan Krishna
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2012149984A1 publication Critical patent/WO2012149984A1/en

Links

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
    • F03D7/0276—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
    • 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
    • F03D7/04—Automatic control; Regulation
    • F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
    • F03D7/043—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic
    • 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
    • F03D7/04—Automatic control; Regulation
    • F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
    • F03D7/043—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic
    • F03D7/046—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic with learning or adaptive control, e.g. self-tuning, fuzzy logic or neural network
    • 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
    • F05B2270/10—Purpose of the control system
    • F05B2270/103—Purpose of the control system to affect the output of the engine
    • F05B2270/1033—Power (if explicitly mentioned)
    • 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
    • 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 invention relates to the field of power genera- tion by wind turbines.
  • the invention relates to a method for operating a wind turbine, a wind turbine controller, a program element, and a computer-readable me ⁇ dium.
  • Wind turbines are becoming more and more popular for ecologi ⁇ cal power generation.
  • the kinetic energy of the wind is converted to rotational energy of a wind turbine rotor by the wind turbine rotor blades and therefrom to electric energy by a generator. So naturally wind turbine rotors have to rotate to be of use.
  • the maximum allowed wind turbine rotor speed is based on various factors e.g. turbine loads, limitations on electrical components, structural properties, etc.
  • wind turbines have been designed for wind turbine rotors operating at or below a constant wind turbine rotor speed, in particular the maximum allowed speed of rotation also known as the rated rotor speed or the nominal rotor speed.
  • a method for operating a wind turbine comprising attributing a significance to at least two wind turbine operating parameters, determining the values of the at least two wind turbine operating parameters, and choosing a desired wind turbine rotor speed based on the significance of the two wind turbine operating parameters and the deter ⁇ mined values of the wind turbine operating parameters.
  • the generator speed measure ⁇ ment may have a better quality since the generator speed may be higher due to the gearbox up-scaling the rotational speed of the rotor, so some control systems may operate at the generator speed and not on the rotor speed.
  • Operating parameters may be of differing importance when choosing the desired wind turbine rotor speed. For example, it may be more important to care about wind turbine component load than about demanded reactive power. Furthermore, the significance of operating parameters may be time dependent. For example, wind turbine noise may be acceptable to a lesser extend during nighttime than during daytime.
  • At least one of the two wind turbine operating parameters is selected from the group consisting of wind turbine rotor synchronization, wind turbine noise, wind turbine component load, wind turbine component lifetime consumption, wind speed, wind turbulence, wind gusts, tem ⁇ peratures, in particular ambient temperature or wind turbine component temperature, humidity, in particular ambient humid ⁇ ity or wind turbine component humidity, air density, demanded active power, demanded reactive power.
  • a wind turbine may be grouped with further wind turbines at one site to form a wind park.
  • the wind turbine rotor speed influences wake and thereby neighboring turbines, in particu- lar downwind turbine, and thus their power production capa ⁇ bilities and turbine component loading. Reducing rotor speed (and power capture) on upwind turbine may reduce loading on the downwind turbines without decreasing overall part per ⁇ formance on park level.
  • Wind turbine in groups may exhibit a visual chaotic impres ⁇ sion caused by the rotors of the individual turbines rotating at different speeds and at different rotor azimuth angles.
  • the visual impression of a wind turbine park may be improved by rotor synchronization, where the azimuth angles of the turbine rotors are aligned by controlling the rotor speeds collectively .
  • wind turbine noise generated by wind turbines essentially depends on wind turbine rotor speed. Taking wind turbine noise into account, in particular during nighttime, when choosing the desired wind turbine rotor speed may im ⁇ prove the acceptance of wind turbines, especially when the wind turbine is erected in or near residential areas.
  • a wind turbine typically comprises several wind turbine components, inter alia wind turbine blades, wind turbine blade roots, wind turbine gearboxes, which wear and tear is influenced by the wind turbine rotor speed. Determining the value of a wind turbine component load and choosing the desired wind turbine rotor speed based on this value may enhance the lifetime of this wind turbine component.
  • wind turbines are rated and designed for a certain lifetime, e.g. twenty years, under the estimation of a mean wear and tear of its wind turbine components.
  • a wind turbine component may have experienced a lower mean wear and tear in the past, i.e. its lifetime consumption may be low. Therefore, a higher desired wind turbine rotor speed typi- cally augmenting wear and tear of the wind turbine component may be acceptable without jeopardizing the rated lifetime.
  • Increasing the desired wind turbine rotor speed may be bene ⁇ ficial as more electrical power may be provided. Accordingly, if the lifetime consumption of the wind turbine component is higher than estimated a lower desired wind turbine rotor speed might be preferred.
  • Wind speed may influence the load experienced by wind turbine components, e.g. the wind turbine tower. Wind speed may even allow estimating the different wind turbine component loads. Additionally, higher wind speeds may allow reducing the desired wind turbine rotor speed while maintaining the active power and/or reactive power produced. However, at very high wind speeds the rotor speed and power may be limited to reduce the loading of the wind turbine components to an acceptable level. At extreme wind speeds it may become neces ⁇ sary to shut down the wind turbine. Wind turbulences may induce additional loads on the wind turbine components. Accordingly, it may be beneficial to reduce the desired wind turbine rotor speed when wind turbu- lences become too important to maintain the wind turbine component load at an acceptable level.
  • wind does not blow with a constant speed, but rather at some turbulence level. Occasionally, wind gust occur, exceeding the normal wind speed variation. Alterna ⁇ tively, or in addition, wind gusts may manifest in wind direction changes. Changing wind directions may impose sup ⁇ plemental wind turbine component loads, which may be more important when the wind turbine rotor speed is higher. Taking wind gusts into consideration when choosing the desired wind turbine rotor speed may therefore reduce wear and tear.
  • Wind turbine component temperature may be a further parameter to be taken into account when choosing the desired wind turbine rotor speed. If a wind turbine component, e.g. a gearbox, gets to hot the desired wind turbine rotor speed may be reduced. However, it may be thinkable that the rotating wind turbine rotor or other rotating wind turbine components with rotational speeds linked to the rotor speed, in particu ⁇ lar blowers or fans in cooling systems, provides cooling air for a certain wind turbine component. Accordingly, it may in this case be beneficial to increase the desired wind turbine rotor speed.
  • Ambient humidity may cause water drops or ice formation on the wind turbine rotor blades and therewith change the aero ⁇ dynamic properties of the wind turbine rotor blades.
  • Accord ⁇ it may be preferred to reduce the desired wind turbine rotor speed.
  • the formation of ice on wind turbine rotor blades may occur at particular combinations of ambient tem ⁇ perature and ambient humidity. Accordingly, it may be also advantageous to evaluate the combination of temperature and humidity when choosing the desired wind turbine rotor speed.
  • Wind turbine component humidity may lead to electric short circuits.
  • Not only the kinetic energy of the wind beside the wind speed depends on the air density but also the aerodynamic proper ⁇ ties of the rotating wind turbine blades.
  • monitoring the air density and choosing the wind turbine rotor speed accordingly may result in a better power generation effi- ciency.
  • Two further parameters which be taken into account are de ⁇ manded active power and demanded reactive power. More and more wind turbines are grouped in wind farms. The electrical power is then transmitted to consumer via power grids. However, the demanded active power and the demanded reactive power may vary. Hence, in times of less demanded active power and/or demanded reactive power the desired wind turbine rotor speed may be reduced to spare lifetime consumption.
  • Wind turbine operating parameters like those presented above may be of different importance. For example, a high accep ⁇ tance of a wind turbine in a residential area may be a nice to have feature whereas reducing wind turbine component loading may be absolutely necessary.
  • Attributing a significance to at least two wind turbine operating parameters may ensure that important wind turbine operating parameters have more influence when choosing the desired wind turbine rotor speed than minor important wind turbine operating parameters.
  • the method comprises defining an upper wind turbine rotor speed threshold value and choosing the desired wind turbine rotor speed to be less or equal to the defined upper wind turbine rotor speed threshold value.
  • Lifetime of wind turbine components may be limited due to wear and tear as well as due to overload. Defining an upper wind turbine rotor speed threshold value and choosing the desired wind turbine rotor speed to be less or equal to the defined upper wind turbine rotor threshold value may prevent as sudden disintegration of wind turbine components.
  • choosing the desired wind turbine rotor speed comprises using a look-up table, applying a fuzzy logic routine and/or applying a neural network and/or applying mathematical linear or non-linear functions.
  • Using a look-up table may be a particularly fast method for choosing the desired wind turbine rotor speed.
  • Applying a fuzzy logic routine may allow to take more wind turbine operating parameters into account.
  • Applying a neural network may be easily adaptable to different wind turbine operating parameters.
  • Applying mathematical linear or non-linear func ⁇ tions may provide a particularly optimized desired wind turbine rotor speed.
  • the method comprises choosing an initial desired wind turbine rotor speed to be equal to the wind turbine rotor speed threshold value.
  • a higher wind turbine rotor speed is beneficial in terms of active power generation and reactive power genera ⁇ tion, which is what wind turbines are built for. Choosing an initial desired wind turbine rotor speed to be equal to the wind turbine rotor speed threshold value may ensure that the wind turbine complies with demanded active power and demanded reactive power while at the same time not putting the struc ⁇ tural integrity of the wind turbine at risk.
  • a wind turbine controller being adapted for operating a wind turbine according to a method as set forth above, the wind turbine controller comprising an output for setting the rotor speed and/or setting the generator speed.
  • Wind turbine rotors may be coupled to a wind turbine genera ⁇ tor either directly or via a gearbox. Accordingly, the de ⁇ sired wind turbine rotor speed may be achieved by either setting the wind turbine rotor speed directly or by setting the wind turbine generator speed.
  • the wind turbine controller comprises a rate severity module, an external constraints module, a supervisory system module, and a reduction module.
  • the wind turbine controller comprises a memory module.
  • the memory module may be used to keep record of lifetime consumption of wind turbine components. It may therefore contribute to ensuring that the rated lifetime of the wind turbine is achieved.
  • the wind turbine controller comprises an input for receiving an input signal indicative of the upper wind tur ⁇ bine rotor speed threshold.
  • An input for receiving an input signal indicative of the upper wind turbine rotor speed threshold may be used to manually set the upper wind turbine rotor speed threshold.
  • a wind turbine comprising a wind turbine controller and at least one sensor providing the wind turbine controller with a signal indicative of a value of at least one parameter of the group consisting of wind turbine rotor synchroniza ⁇ tion, wind turbine noise, wind turbine component load, wind speed, wind turbulence, wind gusts, temperature, in particu ⁇ lar ambient temperature or wind turbine component tempera- ture, humidity, in particular ambient humidity or wind tur ⁇ bine component humidity, air density, demanded active power, and demanded reactive power.
  • Suitable sensors may inter alia be selected from the group consisting of thermometers, thermocouples and thermistors for measuring the temperature, anemometers for measuring wind speed, wind turbulence and wind gusts, pressure sensors, optical sensors, proximity sensors, hygrometers, encoders, accelerometers , gyroscopes, inertial measurement units, strain gauges, and Light Detection And Ranging devices (LIDAR) .
  • a program element for operating a wind turbine the program element, when being executed by a data processor, is adapted for controlling and/or for carrying out a method as set forth above .
  • the program element may be implemented as computer readable instruction code in any suitable programming language, such as, for example, JAVA, C++, and may be stored on a computer- readable medium (removable disk, volatile or non-volatile memory, embedded memory/processor, etc.) .
  • the instruction code is operable to program a computer or any other program- mable device to carry out the intended functions.
  • the program element may be available from a network, such as the World Wide Web, from which it may be downloaded.
  • a computer readable medium on which there is stored a computer program for processing a physical object the computer program, when being executed by a data processor, is adapted for control ⁇ ling and/or for carrying out a method as set forth above.
  • the computer-readable medium may be readable by a computer or a processor.
  • the computer-readable medium may be, for example but not limited to, an electric, magnetic, optical, infrared or semiconductor system, device or transmission medium.
  • the computer-readable medium may include at least one of the following media: a computer-distributable medium, a program storage medium, a record medium, a computer-readable memory, a random access memory, an erasable programmable read-only memory, a computer-readable software distribution package, a computer-readable signal, a computer-readable telecommunica ⁇ tions signal, computer-readable printed matter, and a com ⁇ puter-readable compressed software package.
  • Figure 1 shows a first wind turbine controller according to an exemplary embodiment of the invention.
  • Figure 2 shows a second wind turbine controller according to an exemplary embodiment of the invention.
  • Figure 3 shows a first lifetime consumption versus time diagram of a wind turbine component when the wind turbine is operated according to the state of the art.
  • Figure 4 shows a second lifetime consumption versus time diagram of a wind turbine component when the wind turbine is operated according to an exemplary embodiment of a method according to the invention.
  • FIG. 1 shows a first wind turbine controller 1 according to the invention.
  • the wind turbine controller 1 comprises an input 2 for receiving an input signal indicative of an upper wind turbine rotor speed threshold and an output 3 for set ⁇ ting a wind turbine rotor speed and/or a wind turbine genera ⁇ tor speed. Additionally, there is provided an input 4 for receiving a rotor synchronization value of a rotor synchronization sensor 5, an input 6 for receiving a load monitoring value from a load monitoring sensor 7, and an input 8 for receiving noise control values from a noise control sensor 9.
  • the wind turbine controller 1 assesses the values received and chooses based on the significance, in particular the priority, which has been attributed to them a desired wind turbine rotor speed. Further, the wind turbine controller outputs via its output 3 a value for setting the rotor speed to become equal to the desired wind turbine rotor speed .
  • FIG. 2 shows another wind turbine controller 10 according to an exemplary embodiment of the invention.
  • the wind turbine controller 10 comprises a rate severity module 11, an exter ⁇ nal constraints module 12, supervisory system module 13, and a reduction module 14.
  • the wind turbine control ⁇ ler 10 comprises a blade root module 15, a blade module 16, a gearbox module 17, and a tower module 18.
  • the blade root module 15, blade module 16, gearbox module 17, and tower module 18 calculate the lifetime consumption rate based on sensor data received from corresponding inputs 19, 20, 21, 22.
  • blade root module 15, blade module 16, gearbox module 17, and tower module 18 each comprise a memory module to keep record of the lifetime consumption rate. This memory module allows integrating the lifetime consumption rate of the past to obtain the lifetime consumption of the wind turbine components.
  • Lifetime consumption rate and life ⁇ time consumption of the wind turbine components are then transmitted to the rate severity module 11, which determines a lifetime consumption rate and lifetime for the whole wind turbine, via connections 23, 24, 25, 26, 27, 28, 29, and 30.
  • the supervisory system module 13 receives the lifetime con ⁇ sumption rate and lifetime consumption for the whole wind turbine via its inputs 31 and 32.
  • the external constraints module 12 provides the power module 13 with signals 33, 34, 35, 36, 37, 38 and 39 indicative of the maximum power, which may be provided by the wind turbine, an upper wind turbine rotor speed threshold value, demanded reactive power, demanded active power, wind turbine converter limitations, wind turbine transformer limitations, and wind turbine generator limitations. Demanded active power and demanded reactive power may be set via inputs 40 and 41 of the external constraints module 12.
  • the supervisory system module 13 chooses a desired wind turbine rotor speed based on these signals 33, 34, 35, 36, 37, 38, 39 from the external constraints module 12 and the signals from the rate severity module 11 transmits the de ⁇ sired wind turbine rotor speed to the reduction module 14.
  • the reduction module 14 compares the desired wind turbine rotor speed with the current wind turbine rotor speed and determines a correction value based on this comparison. The correction value is then transmitted to an actuator to influ ⁇ ence the wind turbine rotor speed.
  • Figure 3 shows a lifetime consumption (LC) versus time t diagram of a wind turbine component when the wind turbine is operated according to the state of the art.
  • LC lifetime consumption
  • LT wind turbines
  • Lifetime con ⁇ sumption is an assessment of the wear and tear inflicted on its components relative to the warranted period.
  • blade root, tower and the gearbox, and other components of the turbine the method of deriving the information can very from component to component.
  • a wind turbine is operated such that the wind turbine components lifetime consumption rate follows the dashed line, meaning that the structural mechanical loading follows the intended distribution (10 years of lifetime means 50 percent consumption) .
  • Figure 4 shows a lifetime consumption LC versus time t dia ⁇ gram of a wind turbine component when the wind turbine is operated according to an exemplary embodiment of a method according to the invention.
  • the wind turbine component lifetime consumptions may be chosen so that the turbine will be loaded excessively in the early years of its lifetime, thereby yielding a higher power extraction. And subsequently spare the turbine in later years by operating so the loads are below the expected loading, and thereby even out the difference, as illustrated in Figure 4 by area A having the same size as area B. This may be benefi ⁇ cial under circumstances when power generation is more prof ⁇ itable in early years than in later years.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Software Systems (AREA)
  • Wind Motors (AREA)

Abstract

It is described a method for operating a wind turbine, the method comprising attributing a significance to at least two wind turbine operating parameters, determining the values of the at least two wind turbine operating parameters, and choosing a desired wind turbine rotor speed based on the significance of the two wind turbine operating parameters and on the determined values of the wind turbine operating parameters. Furthermore, the invention concerns a corresponding wind turbine controller and wind turbine.

Description

DESCRIPTION
System and method for operating a wind turbine using an adaptive speed reference
Field of invention
The present invention relates to the field of power genera- tion by wind turbines. In particular, the invention relates to a method for operating a wind turbine, a wind turbine controller, a program element, and a computer-readable me¬ dium.
Art Background
Wind turbines are becoming more and more popular for ecologi¬ cal power generation. The kinetic energy of the wind is converted to rotational energy of a wind turbine rotor by the wind turbine rotor blades and therefrom to electric energy by a generator. So naturally wind turbine rotors have to rotate to be of use. The maximum allowed wind turbine rotor speed is based on various factors e.g. turbine loads, limitations on electrical components, structural properties, etc. Typically, wind turbines have been designed for wind turbine rotors operating at or below a constant wind turbine rotor speed, in particular the maximum allowed speed of rotation also known as the rated rotor speed or the nominal rotor speed.
It has been proposed in EP 2 128 437 A2 to monitor at least two wind turbine operating parameters to determine whether the wind turbine rotor speed can be increased without immedi¬ ately damaging the wind turbine to capture more energy. There may be a need for a more versatile method for operating a wind turbine, for a more versatile wind turbine controller, and a more versatile wind turbine.
Summary of the Invention
This need may be met by the subject matter according to the independent claims. Advantageous embodiments of the present invention are described by the dependent claims.
According to a first aspect of the invention there is pro¬ vided a method for operating a wind turbine, the method comprising attributing a significance to at least two wind turbine operating parameters, determining the values of the at least two wind turbine operating parameters, and choosing a desired wind turbine rotor speed based on the significance of the two wind turbine operating parameters and the deter¬ mined values of the wind turbine operating parameters.
One can measure the rotor speed and/or the generator speed, which are approximately separated by the gear ratio of the drive train of the wind turbine. The generator speed measure¬ ment may have a better quality since the generator speed may be higher due to the gearbox up-scaling the rotational speed of the rotor, so some control systems may operate at the generator speed and not on the rotor speed.
Operating parameters may be of differing importance when choosing the desired wind turbine rotor speed. For example, it may be more important to care about wind turbine component load than about demanded reactive power. Furthermore, the significance of operating parameters may be time dependent. For example, wind turbine noise may be acceptable to a lesser extend during nighttime than during daytime. According to a first embodiment of the method for operating a wind turbine, at least one of the two wind turbine operating parameters is selected from the group consisting of wind turbine rotor synchronization, wind turbine noise, wind turbine component load, wind turbine component lifetime consumption, wind speed, wind turbulence, wind gusts, tem¬ peratures, in particular ambient temperature or wind turbine component temperature, humidity, in particular ambient humid¬ ity or wind turbine component humidity, air density, demanded active power, demanded reactive power.
A wind turbine may be grouped with further wind turbines at one site to form a wind park. The wind turbine rotor speed influences wake and thereby neighboring turbines, in particu- lar downwind turbine, and thus their power production capa¬ bilities and turbine component loading. Reducing rotor speed (and power capture) on upwind turbine may reduce loading on the downwind turbines without decreasing overall part per¬ formance on park level.
Wind turbine in groups may exhibit a visual chaotic impres¬ sion caused by the rotors of the individual turbines rotating at different speeds and at different rotor azimuth angles. The visual impression of a wind turbine park may be improved by rotor synchronization, where the azimuth angles of the turbine rotors are aligned by controlling the rotor speeds collectively .
The amount of wind turbine noise generated by wind turbines essentially depends on wind turbine rotor speed. Taking wind turbine noise into account, in particular during nighttime, when choosing the desired wind turbine rotor speed may im¬ prove the acceptance of wind turbines, especially when the wind turbine is erected in or near residential areas. A wind turbine typically comprises several wind turbine components, inter alia wind turbine blades, wind turbine blade roots, wind turbine gearboxes, which wear and tear is influenced by the wind turbine rotor speed. Determining the value of a wind turbine component load and choosing the desired wind turbine rotor speed based on this value may enhance the lifetime of this wind turbine component.
Usually, wind turbines are rated and designed for a certain lifetime, e.g. twenty years, under the estimation of a mean wear and tear of its wind turbine components. However, a wind turbine component may have experienced a lower mean wear and tear in the past, i.e. its lifetime consumption may be low. Therefore, a higher desired wind turbine rotor speed typi- cally augmenting wear and tear of the wind turbine component may be acceptable without jeopardizing the rated lifetime. Increasing the desired wind turbine rotor speed may be bene¬ ficial as more electrical power may be provided. Accordingly, if the lifetime consumption of the wind turbine component is higher than estimated a lower desired wind turbine rotor speed might be preferred.
Taking wind speed into account may be beneficial as wind speed may influence the load experienced by wind turbine components, e.g. the wind turbine tower. Wind speed may even allow estimating the different wind turbine component loads. Additionally, higher wind speeds may allow reducing the desired wind turbine rotor speed while maintaining the active power and/or reactive power produced. However, at very high wind speeds the rotor speed and power may be limited to reduce the loading of the wind turbine components to an acceptable level. At extreme wind speeds it may become neces¬ sary to shut down the wind turbine. Wind turbulences may induce additional loads on the wind turbine components. Accordingly, it may be beneficial to reduce the desired wind turbine rotor speed when wind turbu- lences become too important to maintain the wind turbine component load at an acceptable level.
Typically, wind does not blow with a constant speed, but rather at some turbulence level. Occasionally, wind gust occur, exceeding the normal wind speed variation. Alterna¬ tively, or in addition, wind gusts may manifest in wind direction changes. Changing wind directions may impose sup¬ plemental wind turbine component loads, which may be more important when the wind turbine rotor speed is higher. Taking wind gusts into consideration when choosing the desired wind turbine rotor speed may therefore reduce wear and tear.
Wind turbine component temperature may be a further parameter to be taken into account when choosing the desired wind turbine rotor speed. If a wind turbine component, e.g. a gearbox, gets to hot the desired wind turbine rotor speed may be reduced. However, it may be thinkable that the rotating wind turbine rotor or other rotating wind turbine components with rotational speeds linked to the rotor speed, in particu¬ lar blowers or fans in cooling systems, provides cooling air for a certain wind turbine component. Accordingly, it may in this case be beneficial to increase the desired wind turbine rotor speed.
In case of a low ambient temperature ice may form on the wind turbine rotor blades augmenting their mass. Accordingly, it may be also advantageous to evaluate the ambient temperature when choosing the desired wind turbine rotor speed.
Ambient humidity may cause water drops or ice formation on the wind turbine rotor blades and therewith change the aero¬ dynamic properties of the wind turbine rotor blades. Accord¬ ingly, it may be preferred to reduce the desired wind turbine rotor speed. The formation of ice on wind turbine rotor blades may occur at particular combinations of ambient tem¬ perature and ambient humidity. Accordingly, it may be also advantageous to evaluate the combination of temperature and humidity when choosing the desired wind turbine rotor speed.
Wind turbine component humidity may lead to electric short circuits. Thus, it may be beneficial to increase the desired wind rotor speed to heat the wind turbine component or pro¬ vide increased airflow surrounding the component and there¬ with reduce the wind turbine component humidity. Not only the kinetic energy of the wind beside the wind speed depends on the air density but also the aerodynamic proper¬ ties of the rotating wind turbine blades. Hence, monitoring the air density and choosing the wind turbine rotor speed accordingly may result in a better power generation effi- ciency.
Two further parameters which be taken into account are de¬ manded active power and demanded reactive power. More and more wind turbines are grouped in wind farms. The electrical power is then transmitted to consumer via power grids. However, the demanded active power and the demanded reactive power may vary. Hence, in times of less demanded active power and/or demanded reactive power the desired wind turbine rotor speed may be reduced to spare lifetime consumption.
Wind turbine operating parameters like those presented above may be of different importance. For example, a high accep¬ tance of a wind turbine in a residential area may be a nice to have feature whereas reducing wind turbine component loading may be absolutely necessary.
Attributing a significance to at least two wind turbine operating parameters may ensure that important wind turbine operating parameters have more influence when choosing the desired wind turbine rotor speed than minor important wind turbine operating parameters. According to another embodiment of the method for operating a wind turbine, the method comprises defining an upper wind turbine rotor speed threshold value and choosing the desired wind turbine rotor speed to be less or equal to the defined upper wind turbine rotor speed threshold value.
Lifetime of wind turbine components may be limited due to wear and tear as well as due to overload. Defining an upper wind turbine rotor speed threshold value and choosing the desired wind turbine rotor speed to be less or equal to the defined upper wind turbine rotor threshold value may prevent as sudden disintegration of wind turbine components.
According to yet another embodiment of the method for operat- ing a wind turbine, choosing the desired wind turbine rotor speed comprises using a look-up table, applying a fuzzy logic routine and/or applying a neural network and/or applying mathematical linear or non-linear functions. Using a look-up table may be a particularly fast method for choosing the desired wind turbine rotor speed. Applying a fuzzy logic routine may allow to take more wind turbine operating parameters into account. Applying a neural network may be easily adaptable to different wind turbine operating parameters. Applying mathematical linear or non-linear func¬ tions may provide a particularly optimized desired wind turbine rotor speed.
According to a further embodiment of the method for operating a wind turbine, the method comprises choosing an initial desired wind turbine rotor speed to be equal to the wind turbine rotor speed threshold value.
Typically, a higher wind turbine rotor speed is beneficial in terms of active power generation and reactive power genera¬ tion, which is what wind turbines are built for. Choosing an initial desired wind turbine rotor speed to be equal to the wind turbine rotor speed threshold value may ensure that the wind turbine complies with demanded active power and demanded reactive power while at the same time not putting the struc¬ tural integrity of the wind turbine at risk.
According to a second aspect of the invention there is pro¬ vided a wind turbine controller being adapted for operating a wind turbine according to a method as set forth above, the wind turbine controller comprising an output for setting the rotor speed and/or setting the generator speed.
Wind turbine rotors may be coupled to a wind turbine genera¬ tor either directly or via a gearbox. Accordingly, the de¬ sired wind turbine rotor speed may be achieved by either setting the wind turbine rotor speed directly or by setting the wind turbine generator speed.
According to a first embodiment of the wind turbine control¬ ler, the wind turbine controller comprises a rate severity module, an external constraints module, a supervisory system module, and a reduction module.
According to another embodiment of the wind turbine control¬ ler, the wind turbine controller comprises a memory module. The memory module may be used to keep record of lifetime consumption of wind turbine components. It may therefore contribute to ensuring that the rated lifetime of the wind turbine is achieved. According to another embodiment of the wind turbine control¬ ler, the wind turbine controller comprises an input for receiving an input signal indicative of the upper wind tur¬ bine rotor speed threshold. An input for receiving an input signal indicative of the upper wind turbine rotor speed threshold may be used to manually set the upper wind turbine rotor speed threshold. According to a third aspect of the invention there is pro¬ vided a wind turbine comprising a wind turbine controller and at least one sensor providing the wind turbine controller with a signal indicative of a value of at least one parameter of the group consisting of wind turbine rotor synchroniza¬ tion, wind turbine noise, wind turbine component load, wind speed, wind turbulence, wind gusts, temperature, in particu¬ lar ambient temperature or wind turbine component tempera- ture, humidity, in particular ambient humidity or wind tur¬ bine component humidity, air density, demanded active power, and demanded reactive power.
Suitable sensors may inter alia be selected from the group consisting of thermometers, thermocouples and thermistors for measuring the temperature, anemometers for measuring wind speed, wind turbulence and wind gusts, pressure sensors, optical sensors, proximity sensors, hygrometers, encoders, accelerometers , gyroscopes, inertial measurement units, strain gauges, and Light Detection And Ranging devices (LIDAR) .
According to a forth aspect there is provided a program element for operating a wind turbine, the program element, when being executed by a data processor, is adapted for controlling and/or for carrying out a method as set forth above .
The program element may be implemented as computer readable instruction code in any suitable programming language, such as, for example, JAVA, C++, and may be stored on a computer- readable medium (removable disk, volatile or non-volatile memory, embedded memory/processor, etc.) . The instruction code is operable to program a computer or any other program- mable device to carry out the intended functions. The program element may be available from a network, such as the World Wide Web, from which it may be downloaded. According to a fifth aspect there is provided a computer readable medium on which there is stored a computer program for processing a physical object, the computer program, when being executed by a data processor, is adapted for control¬ ling and/or for carrying out a method as set forth above.
The computer-readable medium may be readable by a computer or a processor. The computer-readable medium may be, for example but not limited to, an electric, magnetic, optical, infrared or semiconductor system, device or transmission medium. The computer-readable medium may include at least one of the following media: a computer-distributable medium, a program storage medium, a record medium, a computer-readable memory, a random access memory, an erasable programmable read-only memory, a computer-readable software distribution package, a computer-readable signal, a computer-readable telecommunica¬ tions signal, computer-readable printed matter, and a com¬ puter-readable compressed software package.
It has to be noted that embodiments of the invention have been described with reference to different subject matters. In particular, some embodiments have been described with reference to method type claims whereas other embodiments have been described with reference to apparatus type claims. However, a person skilled in the art will gather from the above and the following description that, unless other noti¬ fied, in addition to any combination of features belonging to one type of subject matter also any combination between features relating to different subject matters, in particular between features of the method type claims and features of the apparatus type claims is considered as to be disclosed with this document. The aspects defined above and further aspects of the present invention are apparent from the examples of embodiment to be described hereinafter and are explained with reference to the examples of embodiment. The invention will be described in more detail hereinafter with reference to examples of embodi¬ ment but to which the invention is not limited.
Brief Description of the Drawing
Figure 1 shows a first wind turbine controller according to an exemplary embodiment of the invention.
Figure 2 shows a second wind turbine controller according to an exemplary embodiment of the invention.
Figure 3 shows a first lifetime consumption versus time diagram of a wind turbine component when the wind turbine is operated according to the state of the art.
Figure 4 shows a second lifetime consumption versus time diagram of a wind turbine component when the wind turbine is operated according to an exemplary embodiment of a method according to the invention.
Detailed Description The illustration in the drawing is schematically.
Figure 1 shows a first wind turbine controller 1 according to the invention. The wind turbine controller 1 comprises an input 2 for receiving an input signal indicative of an upper wind turbine rotor speed threshold and an output 3 for set¬ ting a wind turbine rotor speed and/or a wind turbine genera¬ tor speed. Additionally, there is provided an input 4 for receiving a rotor synchronization value of a rotor synchronization sensor 5, an input 6 for receiving a load monitoring value from a load monitoring sensor 7, and an input 8 for receiving noise control values from a noise control sensor 9. During operation the wind turbine controller 1 assesses the values received and chooses based on the significance, in particular the priority, which has been attributed to them a desired wind turbine rotor speed. Further, the wind turbine controller outputs via its output 3 a value for setting the rotor speed to become equal to the desired wind turbine rotor speed .
Figure 2 shows another wind turbine controller 10 according to an exemplary embodiment of the invention. The wind turbine controller 10 comprises a rate severity module 11, an exter¬ nal constraints module 12, supervisory system module 13, and a reduction module 14. Furthermore, the wind turbine control¬ ler 10 comprises a blade root module 15, a blade module 16, a gearbox module 17, and a tower module 18. The blade root module 15, blade module 16, gearbox module 17, and tower module 18 calculate the lifetime consumption rate based on sensor data received from corresponding inputs 19, 20, 21, 22. Additionally, blade root module 15, blade module 16, gearbox module 17, and tower module 18 each comprise a memory module to keep record of the lifetime consumption rate. This memory module allows integrating the lifetime consumption rate of the past to obtain the lifetime consumption of the wind turbine components. Lifetime consumption rate and life¬ time consumption of the wind turbine components are then transmitted to the rate severity module 11, which determines a lifetime consumption rate and lifetime for the whole wind turbine, via connections 23, 24, 25, 26, 27, 28, 29, and 30. The supervisory system module 13 receives the lifetime con¬ sumption rate and lifetime consumption for the whole wind turbine via its inputs 31 and 32.
The external constraints module 12 provides the power module 13 with signals 33, 34, 35, 36, 37, 38 and 39 indicative of the maximum power, which may be provided by the wind turbine, an upper wind turbine rotor speed threshold value, demanded reactive power, demanded active power, wind turbine converter limitations, wind turbine transformer limitations, and wind turbine generator limitations. Demanded active power and demanded reactive power may be set via inputs 40 and 41 of the external constraints module 12. The supervisory system module 13 chooses a desired wind turbine rotor speed based on these signals 33, 34, 35, 36, 37, 38, 39 from the external constraints module 12 and the signals from the rate severity module 11 transmits the de¬ sired wind turbine rotor speed to the reduction module 14. The reduction module 14 compares the desired wind turbine rotor speed with the current wind turbine rotor speed and determines a correction value based on this comparison. The correction value is then transmitted to an actuator to influ¬ ence the wind turbine rotor speed.
Figure 3 shows a lifetime consumption (LC) versus time t diagram of a wind turbine component when the wind turbine is operated according to the state of the art. Typically, wind turbine manufacturers warrant a certain product lifetime of wind turbines (LT) , for example twenty years. Lifetime con¬ sumption is an assessment of the wear and tear inflicted on its components relative to the warranted period. Similarly the same assessment will be made for blade root, tower and the gearbox, and other components of the turbine, the method of deriving the information can very from component to component. Typically, a wind turbine is operated such that the wind turbine components lifetime consumption rate follows the dashed line, meaning that the structural mechanical loading follows the intended distribution (10 years of lifetime means 50 percent consumption) .
Figure 4 shows a lifetime consumption LC versus time t dia¬ gram of a wind turbine component when the wind turbine is operated according to an exemplary embodiment of a method according to the invention. The wind turbine component lifetime consumptions may be chosen so that the turbine will be loaded excessively in the early years of its lifetime, thereby yielding a higher power extraction. And subsequently spare the turbine in later years by operating so the loads are below the expected loading, and thereby even out the difference, as illustrated in Figure 4 by area A having the same size as area B. This may be benefi¬ cial under circumstances when power generation is more prof¬ itable in early years than in later years.
It should be noted that the term "comprising" does not ex¬ clude other elements or steps and the use of articles "a" or "an" does not exclude a plurality. Also elements described in association with different embodiments may be combined. It should also be noted that reference signs in the claims should not be construed as limiting the scope of the claims.
List of reference signs
1 wind turbine controller
2 input
3 output for setting a wind turbine rotor speed
and/or a wind turbine generator speed
4 input for receiving a rotor synchronization value
5 rotor synchronization sensor
6 input for receiving a load monitoring value
7 load monitoring sensor
8 input for receiving noise control values
9 noise control sensor
10 wind turbine controller
11 rate severity module
12 external constraints module
13 supervisory system module
14 reduction module
15 blade root module
16 blade module
17 gearbox module
18 tower module
19 to 22 inputs
23 to 30 connections
31, 32 inputs
33 to 39 signals
40, 41 inputs

Claims

CLAIMS :
1. Method for operating a wind turbine, the method compris- ing
attributing a significance to at least two wind turbine operating parameters,
determining the values of the at least two wind turbine operating parameters, and
choosing a desired wind turbine rotor speed based on the significance of the two wind turbine operating parameters and on the determined values of the wind turbine operating pa¬ rameters .
2. Method for operating a wind turbine according to preced¬ ing claim 1, wherein at least one of the two wind turbine operating parameters is selected from the group consisting of wind turbine rotor synchronization,
wind turbine noise,
wind turbine shadow flicker,
wind turbine component load,
wind turbine component lifetime consumption,
wind speed,
wind direction,
wind shear,
wind turbulence,
wind gusts,
temperature, in particular ambient temperature or wind tur¬ bine component temperature,
humidity, in particular ambient humidity or wind turbine component humidity,
air density,
blade condition, in particular ice, dirt, or other material on the blades,
demanded active power,
demanded reactive power.
3. Method for operating a wind turbine according to any one of the preceding claims 1 or 2, the method comprising
defining an upper wind turbine rotor speed threshold value and
choosing the desired wind turbine rotor speed to be less or equal to the defined upper wind turbine rotor speed threshold value .
4. Method for operating a wind turbine according to any one of the preceding claims 1 to 3,
wherein choosing the desired wind turbine rotor speed com¬ prises
using a look-up table,
applying a fuzzy logic routine and/or,
applying a neural network and/or,
applying logic functions and/or,
applying mathematical linear or non-linear functions.
5. Method for operating a wind turbine according to any one of preceding claims 1 to 4, the method comprising
choosing an initial desired wind turbine rotor speed to be equal to the wind turbine rotor speed threshold value.
6. Wind turbine controller being adapted for operating a wind turbine according to a method as set forth in any one of the claims 1 to 5, the wind turbine controller comprising an output for
setting the wind turbine rotor speed and/or
setting the wind turbine generator speed.
7. Wind turbine controller according to claim 6, comprising a rate severity module,
an external constraints module,
a supervisory system module, and
a reduction module.
8. Wind turbine controller according to any one of the preceding claims 6 or 7, the wind turbine controller compris¬ ing
a memory module.
9. Wind turbine controller according to any one of the preceding claims 6 or 8, the wind turbine controller compris¬ ing an input for receiving an input signal indicative of the upper wind turbine rotor speed threshold.
10. Wind turbine comprising
a wind turbine controller according to any one of the preced¬ ing claims 6 to 8 and
at least one sensor providing the wind turbine controller with a signal indicative of a value of at least one parameter of the group consisting of
wind turbine rotor synchronization,
wind turbine noise,
wind turbine shadow flicker,
wind turbine component load,
wind turbine component lifetime consumption,
wind speed,
wind direction,
wind shear,
wind turbulence,
wind gusts,
temperature, in particular ambient temperature or wind tur¬ bine component temperature,
humidity, in particular ambient humidity or wind turbine component humidity,
air density,
blade condition, in particular ice, dirt, or other material on the blades,
demanded active power, and
demanded reactive power.
11. Program element for operating a wind turbine, the pro¬ gram element, when being executed by a data processor, is adapted for controlling and/or for carrying out the method as set forth in any one of the claims 1 to 5.
12. Computer readable medium on which there is stored a computer program for processing a physical object, the computer program, when being executed by a data processor, is adapted for controlling and/or for carrying out the method as set forth in any one of the claims 1 to 5.
PCT/EP2011/065796 2011-05-04 2011-09-13 System and method for operating a wind turbine using an adaptive speed reference WO2012149984A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11164757.4 2011-05-04
EP11164757 2011-05-04

Publications (1)

Publication Number Publication Date
WO2012149984A1 true WO2012149984A1 (en) 2012-11-08

Family

ID=44651763

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/065796 WO2012149984A1 (en) 2011-05-04 2011-09-13 System and method for operating a wind turbine using an adaptive speed reference

Country Status (1)

Country Link
WO (1) WO2012149984A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103161668A (en) * 2013-02-21 2013-06-19 上海交通大学 Intelligent wind turbine generator working condition identification system and method
US20150115610A1 (en) * 2013-10-29 2015-04-30 Patrick Quinlan Integrated wind turbine acoustic noise and shadow-flicker detection and mitigation system
CN104929864A (en) * 2015-02-06 2015-09-23 青岛科技大学 Field programmable gate array (FPGA)-based embedded type operating state monitoring and fault diagnosis system for wind generating set
EP3067555A1 (en) * 2015-03-12 2016-09-14 General Electric Company System and method for reducing fan noise during noise reduced operation of a wind turbine
US9551321B2 (en) 2013-06-26 2017-01-24 General Electric Company System and method for controlling a wind turbine
US9624905B2 (en) 2013-09-20 2017-04-18 General Electric Company System and method for preventing excessive loading on a wind turbine
US9631606B2 (en) 2014-04-14 2017-04-25 General Electric Company System and method for thrust-speed control of a wind turbine
DE102016124703A1 (en) * 2016-12-16 2018-06-21 Wobben Properties Gmbh A method of operating a wind turbine and means for controlling and / or regulating a wind turbine and corresponding wind turbine with a rotor and a generator driven via the rotor for generating an electrical power
US10634121B2 (en) 2017-06-15 2020-04-28 General Electric Company Variable rated speed control in partial load operation of a wind turbine
EP3690234A1 (en) * 2019-02-04 2020-08-05 Siemens Gamesa Renewable Energy A/S Wind turbine control
US10958066B2 (en) 2017-09-13 2021-03-23 General Electric Company Control method for protecting primary windings of wind turbine transformers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030127862A1 (en) * 2000-03-09 2003-07-10 Roland Weitkamp Control system for a wind power plant
US20030185665A1 (en) * 2000-03-08 2003-10-02 Hansen Lars H. Method of operating a turbine
US20090224543A1 (en) * 2008-03-06 2009-09-10 Repower Systems Ag Method for the operation of a wind power plant and wind power plant
EP2128437A2 (en) 2008-05-29 2009-12-02 General Electric Company Method for increasing energy capture in a wind turbine
US20100135789A1 (en) * 2009-09-30 2010-06-03 Danian Zheng System and methods for controlling a wind turbine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030185665A1 (en) * 2000-03-08 2003-10-02 Hansen Lars H. Method of operating a turbine
US20030127862A1 (en) * 2000-03-09 2003-07-10 Roland Weitkamp Control system for a wind power plant
US20090224543A1 (en) * 2008-03-06 2009-09-10 Repower Systems Ag Method for the operation of a wind power plant and wind power plant
EP2128437A2 (en) 2008-05-29 2009-12-02 General Electric Company Method for increasing energy capture in a wind turbine
US20100135789A1 (en) * 2009-09-30 2010-06-03 Danian Zheng System and methods for controlling a wind turbine

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103161668A (en) * 2013-02-21 2013-06-19 上海交通大学 Intelligent wind turbine generator working condition identification system and method
US9551321B2 (en) 2013-06-26 2017-01-24 General Electric Company System and method for controlling a wind turbine
US9624905B2 (en) 2013-09-20 2017-04-18 General Electric Company System and method for preventing excessive loading on a wind turbine
US20150115610A1 (en) * 2013-10-29 2015-04-30 Patrick Quinlan Integrated wind turbine acoustic noise and shadow-flicker detection and mitigation system
WO2015066003A1 (en) * 2013-10-29 2015-05-07 Quinlan Patrick Wind turbine acoustic noise and shadow-flicker mitigation
US9631606B2 (en) 2014-04-14 2017-04-25 General Electric Company System and method for thrust-speed control of a wind turbine
CN104929864A (en) * 2015-02-06 2015-09-23 青岛科技大学 Field programmable gate array (FPGA)-based embedded type operating state monitoring and fault diagnosis system for wind generating set
EP3067555A1 (en) * 2015-03-12 2016-09-14 General Electric Company System and method for reducing fan noise during noise reduced operation of a wind turbine
DE102016124703A1 (en) * 2016-12-16 2018-06-21 Wobben Properties Gmbh A method of operating a wind turbine and means for controlling and / or regulating a wind turbine and corresponding wind turbine with a rotor and a generator driven via the rotor for generating an electrical power
WO2018109100A1 (en) 2016-12-16 2018-06-21 Wobben Properties Gmbh Method for operating a wind turbine and device for the open-loop and/or closed-loop control of a wind turbine and corresponding wind turbine having a rotor and a generator driven by the rotor for generating electrical power
US10634121B2 (en) 2017-06-15 2020-04-28 General Electric Company Variable rated speed control in partial load operation of a wind turbine
US10958066B2 (en) 2017-09-13 2021-03-23 General Electric Company Control method for protecting primary windings of wind turbine transformers
EP3690234A1 (en) * 2019-02-04 2020-08-05 Siemens Gamesa Renewable Energy A/S Wind turbine control
CN111520283A (en) * 2019-02-04 2020-08-11 西门子歌美飒可再生能源公司 Wind turbine control
US10968889B2 (en) 2019-02-04 2021-04-06 Siemens Gamesa Renewable Energy A/S Wind turbine control
CN111520283B (en) * 2019-02-04 2022-12-13 西门子歌美飒可再生能源公司 Wind turbine control

Similar Documents

Publication Publication Date Title
WO2012149984A1 (en) System and method for operating a wind turbine using an adaptive speed reference
US9822762B2 (en) System and method for operating a wind turbine
US11041483B2 (en) Methods of operating a wind turbine
EP2249030B1 (en) Wind turbine
EP3067556B1 (en) System and method for variable tip-speed-ratio control of a wind turbine
US10215157B2 (en) Methods for controlling wind turbine with thrust control twist compensation
EP2757256A2 (en) Wind turbine and method for adjusting rotor blade pitch angle in wind turbines
CN109958577B (en) System and method for protecting wind turbines during gusts
US20180180024A1 (en) Initialisation of wind turbine control functions
EP3470670B1 (en) System and method for operating wind turbines to avoid stall during derating
EP3643914B1 (en) System and method for protecting wind turbines from extreme and fatigue loads
US20120112460A1 (en) Probing power optimization for wind farms
EP3581795A1 (en) System and method for controlling a wind turbine to minimize rotor blade damage
WO2018204447A1 (en) Adjustment factor for aerodynamic performance map
US11608811B2 (en) System and method for mitigating loads acting on a rotor blade of a wind turbine
CN112005009B (en) System and method for improved overspeed monitoring of wind turbines operating at reduced rotor speeds
EP3608538A1 (en) Model-based repowering solutions for wind turbines
TWI707086B (en) Wind power plant control system and control method of wind power plant
EP3124789B1 (en) Wind turbine control using secondary controller to adjust wind speed and/or direction input values

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11757601

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11757601

Country of ref document: EP

Kind code of ref document: A1