CN111980853A - Pitch control method and device and computer readable storage medium - Google Patents
Pitch control method and device and computer readable storage medium Download PDFInfo
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- 238000010248 power generation Methods 0.000 abstract description 8
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- 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
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- 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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- 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
- F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
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- 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
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- 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- 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
Abstract
The invention discloses a variable pitch control method, a variable pitch control device and a computer readable storage medium. Wherein, the method comprises the following steps: acquiring pitch angle parameters of the wind generating set at a plurality of moments; calculating turbulence intensity of the wind field position of the wind generating set at the current moment according to the pitch angle parameters at a plurality of moments; determining a correction coefficient corresponding to the turbulence intensity at the current moment according to the preset corresponding relation between each turbulence intensity and the correction coefficient, and adjusting the proportional control parameter of the wind generating set by using the corresponding correction coefficient, wherein the proportional control parameter is used for adjusting the pitch angle of a plurality of blades of the wind generating set; and controlling the pitch of the wind generating set according to the adjusted proportional control parameter. According to the embodiment of the invention, the turbulence intensity of the wind field can be determined by utilizing the pitch angle parameters in the operating data of the wind generating set so as to control the pitch of the wind generating set, thereby improving the control precision of the pitch control and reducing the cost of wind power generation.
Description
Technical Field
The invention belongs to the technical field of wind driven generators, and particularly relates to a variable pitch control method and device and a computer readable storage medium.
Background
Turbulence intensity is a measure of the degree of pulsation in the velocity of the gas stream. When the turbulence intensity of a wind field changes, the generation of the power generation energy of the wind generating set is influenced.
In the prior art, a laser radar is generally used to directly measure the turbulence intensity of a wind field where a wind generating set is located, or an anemometer is used to measure the wind speed and calculate the turbulence intensity of the wind field where the wind generating set is located, so as to correct the control parameters of the pitch control according to the measured turbulence intensity.
However, the above methods for measuring the turbulence intensity of the wind field in which the wind turbine generator set is located all need to add additional sensors, so that the cost of wind power generation is high. In addition, the accuracy of the measurement result of directly measuring the turbulence intensity or the wind speed of the wind field where the wind generating set is located by using the sensor is low, so that the precision of pitch control is low, and the load of the wind generating set cannot be effectively reduced.
Disclosure of Invention
Embodiments of the present invention provide a pitch control method, a pitch control device, and a computer-readable storage medium, which can determine wind field turbulence intensity by using pitch angle parameters in operating data of a wind turbine generator system to control pitch of the wind turbine generator system, thereby improving control accuracy of pitch control and reducing cost of wind power generation.
In one aspect, an embodiment of the present invention provides a pitch control method, including:
acquiring pitch angle parameters of the wind generating set at a plurality of moments;
calculating turbulence intensity of the wind field position of the wind generating set at the current moment according to the pitch angle parameters at a plurality of moments;
determining a correction coefficient corresponding to the turbulence intensity at the current moment according to the preset corresponding relation between each turbulence intensity and the correction coefficient, and adjusting the proportional control parameter of the wind generating set by using the corresponding correction coefficient, wherein the proportional control parameter is used for adjusting the pitch angle of a plurality of blades of the wind generating set;
and controlling the pitch of the wind generating set according to the adjusted proportional control parameter.
Further, calculating the turbulence intensity of the wind field position where the wind generating set is located at the current moment according to the pitch angle parameters at a plurality of moments, including:
calculating the average value and the standard deviation of pitch angle parameters of the wind generating set at a plurality of moments;
from the mean and standard deviation, the turbulence intensity is determined.
Further, determining the turbulence intensity according to the mean value and the standard deviation comprises:
in the case where the average value is equal to 0, determining the turbulence intensity to be 1;
In the case where the average value is larger than 0, the turbulence intensity is determined as a ratio of the standard deviation and the average value.
Further, the pitch angle parameter is a pitch angle average value of a plurality of blades of the wind generating set.
Further, determining a correction coefficient corresponding to the turbulence intensity at the current moment according to a preset corresponding relationship between each turbulence intensity and the correction coefficient, including:
if the turbulence intensity at the current moment is smaller than a first preset threshold, determining a correction coefficient corresponding to the turbulence intensity at the current moment according to the linear relation between each turbulence intensity and the correction coefficient;
and if the turbulence intensity at the current moment is greater than or equal to the first preset threshold, determining that the correction coefficient corresponding to the turbulence intensity at the current moment is 1.
In another aspect, an embodiment of the present invention provides a pitch control apparatus, where the apparatus includes:
the pitch angle parameter acquisition module is configured to acquire pitch angle parameters of the wind generating set at a plurality of moments;
the turbulence intensity calculation module is configured to calculate turbulence intensity of a wind field position where the wind generating set is located at the current moment according to the pitch angle parameters at a plurality of moments;
the pitch angle proportional control parameter correction module is configured to determine a correction coefficient corresponding to the turbulence intensity at the current moment according to the preset corresponding relation between each turbulence intensity and the correction coefficient, and adjust the proportional control parameter of the wind generating set by using the corresponding correction coefficient, wherein the proportional control parameter is used for adjusting the pitch angle of a plurality of blades of the wind generating set;
And the variable pitch control module is configured to control the variable pitch of the wind generating set according to the adjusted proportional control parameter.
Further, the turbulence intensity calculation module is further configured to calculate an average value and a standard deviation of the pitch angle parameters of the wind turbine generator set at a plurality of time instants, and determine the turbulence intensity according to the average value and the standard deviation.
Further, the turbulence intensity calculation module is further configured to determine that the turbulence intensity is 1 if the average value is equal to 0; in case the average value is larger than 0, the turbulence intensity is determined as the ratio of the standard deviation and the average value, or/and,
the pitch angle parameter is an average value of pitch angles of a plurality of blades of the wind generating set.
Further, the device is arranged in a pitch controller or a main controller of the wind generating set.
In another aspect, an embodiment of the present invention provides a computer-readable storage medium, where computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are executed by a processor, the pitch control method according to the embodiment of the present invention is implemented.
According to the pitch control method, the pitch control device and the computer readable storage medium, the turbulence intensity of the wind field position of the wind generating set at the current moment can be calculated by utilizing the running data of the wind generating set, namely the pitch angle parameters at a plurality of moments, so that the wind generating set can measure the turbulence intensity of the wind field without adding any external equipment, and the cost of wind power generation is reduced.
According to the pitch control method, the pitch control device and the computer readable storage medium, the turbulence intensity at the current moment can be obtained through calculation by utilizing the running data of the wind generating set, the correction coefficient is determined according to the turbulence intensity, the proportional control parameter used by the pitch control is adjusted by utilizing the correction coefficient, the pitch of the wind generating set is controlled according to the adjusted proportional control parameter, and the accuracy of the measurement result of the turbulence intensity can be improved due to the fact that the running data of the wind generating set is utilized to measure the turbulence intensity of the wind field, so that the control precision of the pitch control is improved, the load of the wind generating set is effectively reduced, and the service life of a pitch system of the wind generating set is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a pitch control method provided by an embodiment of the invention;
FIG. 2 is a detailed flow chart of a pitch control method of one example of the present invention;
FIG. 3 is a schematic structural diagram of a pitch control apparatus provided in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a hardware structure of a pitch controller according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the actual power generation process, the anemometer is subjected to a lot of external interference. For example, for an upwind wind turbine generator system, the anemoscope is located behind the impeller, that is, wind first passes through the impeller and then reaches the anemoscope, so that the wind speed measured by the anemoscope is disturbed by the impeller, and therefore the wind speed measured by the anemoscope contains much noise, and the accuracy of the measurement result is low.
The embodiment of the invention provides a variable pitch control method, which is used for calculating turbulence intensity by using a pitch angle parameter in running data of a wind generating set.
First, a pitch control method provided by an embodiment of the present invention is described below.
FIG. 1 shows a schematic flow diagram of a pitch control method according to an embodiment of the invention. As shown in fig. 1, the pitch control method includes:
s110, obtaining pitch angle parameters of the wind generating set at multiple moments;
s120, calculating turbulence intensity of the wind field position where the wind generating set is located at the current moment according to the pitch angle parameters at a plurality of moments;
s130, determining a correction coefficient corresponding to the turbulence intensity at the current moment according to the preset corresponding relation between each turbulence intensity and the correction coefficient, and adjusting the proportional control parameter of the wind generating set by using the corresponding correction coefficient, wherein the proportional control parameter is used for adjusting the pitch angle of a plurality of blades of the wind generating set;
And S140, controlling the variable pitch of the wind generating set according to the adjusted proportional control parameter.
In the embodiment of the invention, the turbulence intensity of the wind field position of the wind generating set at the current moment can be calculated by utilizing the operating data of the wind generating set, namely the pitch angle parameters at a plurality of moments, so that the wind generating set can measure the turbulence intensity of the wind field without adding any external equipment, and the cost of wind power generation is reduced. In addition, the embodiment of the invention can determine the correction coefficient by calculating the turbulence intensity at the current moment, and adjust the proportional control parameter used by the pitch control by using the correction coefficient, so that the pitch of the wind generating set can be controlled according to the adjusted proportional control parameter.
In step S110 of some embodiments of the invention, the pitch angle parameter may be an average pitch angle of a plurality of blades of the wind park. At this time, the turbulence intensity felt by the whole blades of the wind generating set can be calculated by using the average value of the pitch angles of the blades of the wind generating set, so that the whole pitch control correction is realized for the blades of the wind generating set. In step S110 according to other embodiments of the present invention, the pitch angle parameter may also be a pitch angle of any blade of the wind turbine. At this time, the turbulence intensity felt by the blade can be calculated by using the pitch angle of the blade, so that the pitch control of the blade is corrected.
In the embodiment of the invention, a specific method for acquiring the pitch angle parameters of the wind generating set at multiple moments can be to acquire the pitch angle parameters at multiple moments by using a sliding window detection method. The sliding window detection method is characterized in that the pitch angle parameters acquired at the current moment are stored into a first data position of an array with a preset array length, and the pitch angle parameters acquired at the historical moment are sequentially moved backwards by one data position in the array. For example, assuming that the pitch angle parameter collected is x (k), and k is time, then:
for the first acquisition cycle, the pitch angle parameters in the array are:
[x(1) 0 …]
for the second acquisition cycle, the pitch angle parameters in the array are:
[x(2) x(1) …]
by analogy, an array of the current acquisition period can be obtained.
In the embodiment of the invention, the length of the preset array can be determined according to the meta-computation period of the wind generating set and the preset data acquisition time for calculating the turbulence intensity. For example, the meta-computation period of the wind generating set is 0.02s, the preset data acquisition time is 10s, and at this time, the preset array length may be 500.
In step S120 of the embodiment of the present invention, a specific method for calculating a turbulence intensity of a wind field position where the wind turbine generator system is located at a current time according to pitch angle parameters at multiple times may include:
S121, calculating the average value and the standard deviation of pitch angle parameters of the wind generating set at multiple moments;
and S122, determining the turbulence intensity according to the average value and the standard deviation.
Under the condition that the wind speed is measured by the anemoscope and the turbulence intensity of the wind field position where the wind generating set is located is calculated, the wind speed measured by the anemoscope can be calculated to obtain the wind speed standard deviation and the wind speed mean value, and then the turbulence intensity is calculated by the turbulence intensity calculation formula.
Wherein, the calculation formula of the turbulence intensity is as follows:
wherein v iswIndicating wind speed, DvwIndicating standard deviation of wind speed, EvwRepresenting mean wind velocity, IwIndicating the intensity of the turbulence.
By utilizing the static curve of the wind generating set, the wind generating set can be subjected to static analysis, and the operation data of the wind generating set at different wind speeds can be obtained. By analyzing the operating data at different wind speeds, the relationship between the wind speed and the pitch angle is generally a linear relationship, the pitch angle parameter is the operating data of the wind generating set, the wind generating set cannot be interfered by environmental factors, and the measurement accuracy is high, so that the pitch angle parameter can reflect the actual wind speed more truly.
The turbulence intensity calculation formula can be rewritten as:
Wherein v ispRepresenting the pitch angle parameter, DvpRepresenting the standard deviation of the pitch angle parameter, EvpRepresenting mean values of pitch angle parameters, IpIndicating the intensity of the turbulence.
Therefore, in the case where the average value is equal to 0, the turbulence intensity may be determined to be 1; in the case where the average value is greater than 0, the turbulence intensity may be determined as a ratio of the standard deviation and the average value.
In the embodiment of the invention, the turbulence intensity can be detected only by using the pitch angle parameters, the data acquisition quantity can be reduced, the data processing quantity is reduced, the data processing efficiency is improved, the pitch control correction is quickly realized, and the pitch angle of the wind generating set is timely adjusted according to the change of the turbulence intensity, so that the service life of a pitch system of the wind generating set is prolonged. In addition, the pitch angle parameter can reflect the actual wind speed more truly, and a more accurate detection result of the turbulence intensity can be obtained.
In step S130 of the embodiment of the present invention, according to the preset corresponding relationship between each turbulence intensity and the correction coefficient, a specific method for determining the correction coefficient corresponding to the turbulence intensity at the current time may include:
if the turbulence intensity at the current moment is smaller than a first preset threshold, determining a correction coefficient corresponding to the turbulence intensity at the current moment according to the linear relation between each turbulence intensity and the correction coefficient;
And if the turbulence intensity at the current moment is greater than or equal to the first preset threshold, determining that the correction coefficient corresponding to the turbulence intensity at the current moment is 1.
Specifically, the first preset threshold and the linear relationship corresponding to the flow intensity and the correction coefficient may be determined according to a corresponding relationship lookup table of the turbulence intensity and the correction coefficient preset by the wind turbine generator system. Table 1 shows a lookup table of the correspondence between the turbulence intensity and the correction factor of one type of wind turbine generator system.
TABLE 1 turbulent intensity and correction factor corresponding relation lookup table
| Intensity of turbulence | 0 | 0.2 | 0.4 |
| Correction factor | 0.9 | 0.95 | 1 |
According to table 1, the first preset threshold value of this type of wind turbine generator set is 0.4, i.e. when the turbulence intensity is less than 0.4, the turbulence intensity and the correction factor have a linear relationship, and when the turbulence intensity is greater than or equal to 0.4, the turbulence intensity is 1.
For example, if the turbulence intensity is 0.1, the correction factor is
In an embodiment of the present invention, the proportional control parameter is a proportional-Integral-derivative (PID) controller for adjusting a pitch angle of a plurality of blades of the wind turbine generator system together with other control parameters.
The specific method for adjusting the proportional control parameter of the wind generating set by using the correction coefficient corresponding to the turbulence intensity at the current moment can be to multiply the proportional control parameter actually running in the PID controller by the correction coefficient to obtain a corrected proportional control parameter, and the specific formula is as follows:
Kpyar＝f×Kp
Wherein, KpFor the actual operating proportional control parameter, KpyarF is a correction coefficient for the corrected proportional control parameter.
After the proportional control parameters are adjusted by using the correction coefficients, step S140 may be executed, and the adjusted proportional control parameters are used to control the pitch of the wind generating set, so as to control each blade of the wind generating set to change the pitch angle.
FIG. 2 shows a detailed flow chart of a pitch control method according to an example of the invention. As shown in fig. 2, a specific flow of pitch control may include:
s201, storing the average value of the pitch angle into an array with the length of 500 in a sliding window mode, and accordingly obtaining pitch angle parameters at multiple moments;
s202, calculating the average value and the standard deviation of the pitch angle parameters;
s203, judging whether the average value is 0, if so, executing a step S204, otherwise, executing a step S205;
s204, setting the turbulence intensity as 1;
s205, dividing the standard deviation by the average value to obtain the turbulence intensity;
s206, determining a corresponding correction coefficient according to the turbulence intensity;
s207, adjusting the proportional control parameter of the PID controller by using the correction coefficient;
and S208, controlling the pitch of the wind generating set according to the adjusted proportional control parameter.
In summary, the pitch control method provided in the embodiments of the present invention can realize load shedding and pitch control of the wind turbine generator system without adding any device, optimize the load of the wind turbine generator system, prolong the service life of the pitch system of the wind turbine generator system, and reduce the operation and maintenance cost.
FIG. 3 shows a schematic structural diagram of a pitch control apparatus provided by an embodiment of the invention. As shown in fig. 3, the pitch control apparatus includes:
a pitch angle parameter obtaining module 310 configured to obtain pitch angle parameters of the wind generating set at a plurality of moments;
the turbulence intensity calculating module 320 is configured to calculate turbulence intensity of the wind field position where the wind generating set is located at the current moment according to the pitch angle parameters at the multiple moments;
a pitch angle proportional control parameter correction module 330 configured to determine a correction coefficient corresponding to the turbulence intensity at the current moment according to a preset correspondence between each turbulence intensity and the correction coefficient, and adjust a proportional control parameter of the wind turbine generator system by using the corresponding correction coefficient, wherein the proportional control parameter is used for adjusting a pitch angle of a plurality of blades of the wind turbine generator system;
And the variable pitch control module 340 is configured to control the variable pitch of the wind generating set according to the adjusted proportional control parameter.
In the embodiment of the invention, the turbulence intensity of the wind field position of the wind generating set at the current moment can be calculated by utilizing the operating data of the wind generating set, namely the pitch angle parameters at a plurality of moments, so that the wind generating set can measure the turbulence intensity of the wind field without adding any external equipment, and the cost of wind power generation is reduced. In addition, the embodiment of the invention can determine the correction coefficient by calculating the turbulence intensity at the current moment, and adjust the proportional control parameter used by the pitch control by using the correction coefficient, so that the pitch of the wind generating set can be controlled according to the adjusted proportional control parameter.
In an embodiment of the present invention, the pitch angle parameter obtaining module 310 is further configured to collect pitch angle parameters at a plurality of time instants using a sliding window detection method.
In some embodiments of the invention, the pitch angle parameter obtained by the turbulence intensity calculation module 310 may be an average value of the pitch angles of a plurality of blades of the wind park. In other embodiments of the present invention, the pitch angle parameter obtained by the turbulence intensity calculation module 310 may also be a pitch angle of any blade of the wind turbine generator set.
In an embodiment of the invention, the turbulence intensity calculation module 320 is further configured to calculate a mean value and a standard deviation of the pitch angle parameters of the wind turbine generator set at a plurality of time instants, and determine the turbulence intensity according to the mean value and the standard deviation.
In particular, the turbulence intensity calculation module 320 may be further configured to determine that the turbulence intensity is 1 if the average value is equal to 0; in the case where the average value is larger than 0, the turbulence intensity is determined as a ratio of the standard deviation and the average value.
Therefore, in the embodiment of the invention, the turbulence intensity can be detected only by using the pitch angle parameters, the data acquisition quantity can be reduced, the data processing quantity is reduced, the data processing efficiency is improved, the pitch control correction is quickly realized, and the pitch angle of the wind generating set is timely adjusted according to the change of the turbulence intensity, so that the service life of a pitch system of the wind generating set is prolonged. In addition, the pitch angle parameter can reflect the actual wind speed more truly, and a more accurate detection result of the turbulence intensity can be obtained.
In this embodiment of the present invention, the pitch angle ratio control parameter modification module 330 is further configured to determine, if the turbulence intensity at the current time is smaller than the first preset threshold, a modification coefficient corresponding to the turbulence intensity at the current time according to a linear relationship between each turbulence intensity and the modification coefficient; and if the turbulence intensity at the current moment is greater than or equal to the first preset threshold, determining that the correction coefficient corresponding to the turbulence intensity at the current moment is 1.
Specifically, the linear relationship between the first preset threshold value and the turbulence intensity and the correction coefficient may be determined according to a lookup table of a correspondence between the turbulence intensity and the correction coefficient preset by the wind turbine generator system.
In the embodiment of the invention, the pitch control device can be arranged in a pitch controller or a main controller of the wind generating set.
FIG. 4 shows a hardware configuration diagram of a pitch controller provided by an embodiment of the invention.
The pitch controller may comprise a processor 401 and a memory 402 having stored computer program instructions.
Specifically, the processor 401 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing embodiments of the present invention.
The processor 401 may be configured to implement any of the pitch control methods described in the embodiments above by reading and executing computer program instructions stored in the memory 402.
In one example, pitch controller may also include a communication interface 403 and a bus 410. As shown in fig. 4, the processor 401, the memory 402, and the communication interface 403 are connected via a bus 410 to complete communication therebetween.
The communication interface 403 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.
The pitch controller can execute the pitch control method in the embodiment of the invention, thereby realizing the pitch control method and the device described in the embodiment of the invention.
In addition, in combination with the pitch control method in the foregoing embodiments, embodiments of the present invention may provide a computer-readable storage medium to implement. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the pitch control methods in the above embodiments.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A pitch control method, comprising:
acquiring pitch angle parameters of the wind generating set at a plurality of moments;
calculating to obtain the turbulence intensity of the wind farm position where the wind generating set is located at the current moment according to the pitch angle parameters at the multiple moments;
Determining a correction coefficient corresponding to the turbulence intensity at the current moment according to a preset corresponding relation between each turbulence intensity and the correction coefficient, and adjusting a proportional control parameter of the wind generating set by using the corresponding correction coefficient, wherein the proportional control parameter is used for adjusting the pitch angle of a plurality of blades of the wind generating set;
and controlling the variable pitch of the wind generating set according to the adjusted proportional control parameter.
2. The pitch control method according to claim 1, wherein the calculating, according to the pitch angle parameters at the plurality of moments, the turbulence intensity of the wind farm position where the wind turbine generator system is located at the current moment includes:
calculating the average value and the standard deviation of pitch angle parameters of the wind generating set at a plurality of moments;
and determining the turbulence intensity according to the average value and the standard deviation.
3. The pitch control method of claim 2, wherein said determining the turbulence intensity from the mean and the standard deviation comprises:
determining the turbulence intensity to be 1 in case the average value is equal to 0;
in the case where the average value is greater than 0, determining the turbulence intensity as a ratio of the standard deviation and the average value.
4. A pitch control method according to claim 1 or 2, wherein the pitch angle parameter is a pitch angle average of a plurality of blades of the wind park.
5. The pitch control method according to claim 1, wherein the determining a correction coefficient corresponding to the turbulence intensity at the current time according to a preset correspondence between each turbulence intensity and the correction coefficient includes:
if the turbulence intensity at the current moment is smaller than a first preset threshold, determining a correction coefficient corresponding to the turbulence intensity at the current moment according to the linear relation between each turbulence intensity and the correction coefficient;
and if the turbulence intensity at the current moment is greater than or equal to a first preset threshold, determining that the correction coefficient corresponding to the turbulence intensity at the current moment is 1.
6. A pitch control apparatus, characterized in that the apparatus comprises:
the pitch angle parameter acquisition module is configured to acquire pitch angle parameters of the wind generating set at a plurality of moments;
the turbulence intensity calculation module is configured to calculate turbulence intensity of the wind farm position where the wind generating set is located at the current moment according to the pitch angle parameters at the multiple moments;
The pitch angle proportional control parameter correction module is configured to determine a correction coefficient corresponding to the turbulence intensity at the current moment according to a preset corresponding relation between each turbulence intensity and the correction coefficient, and adjust a proportional control parameter of the wind generating set by using the corresponding correction coefficient, wherein the proportional control parameter is used for adjusting the pitch angles of a plurality of blades of the wind generating set;
and the variable pitch control module is configured to control the variable pitch of the wind generating set according to the adjusted proportional control parameter.
7. The pitch control apparatus of claim 6, wherein the turbulence intensity calculation module is further configured to calculate a mean value and a standard deviation of pitch angle parameters of the wind turbine generator set at a plurality of time instants, and to determine the turbulence intensity from the mean value and the standard deviation.
8. The pitch control apparatus of claim 7, wherein the turbulence intensity calculation module is further configured to determine that the turbulence intensity is 1 if the average value is equal to 0; in case the mean value is larger than 0, determining the turbulence intensity as a ratio of the standard deviation and the mean value, or/and,
The pitch angle parameter is an average pitch angle value of a plurality of blades of the wind generating set.
9. A pitch control apparatus according to any of claims 6-7, characterized in that the apparatus is arranged in a pitch controller or a main controller of the wind park.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement a pitch control method according to any of claims 1-5.
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| CN117212074A (en) * | 2023-09-25 | 2023-12-12 | 武汉盈风能源科技有限公司 | Wind power generation system, temperature rise early warning method of variable pitch motor of wind power generation system and storage medium |
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