CN116085194A - Gust control method, device, medium and system for wind generating set - Google Patents
Gust control method, device, medium and system for wind generating set Download PDFInfo
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- CN116085194A CN116085194A CN202310160154.6A CN202310160154A CN116085194A CN 116085194 A CN116085194 A CN 116085194A CN 202310160154 A CN202310160154 A CN 202310160154A CN 116085194 A CN116085194 A CN 116085194A
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- 230000001133 acceleration Effects 0.000 claims abstract description 37
- 230000008859 change Effects 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 7
- 238000010248 power generation Methods 0.000 abstract description 14
- 238000005452 bending Methods 0.000 abstract description 6
- 230000002596 correlated effect Effects 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 230000000875 corresponding effect Effects 0.000 description 8
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- 230000006978 adaptation Effects 0.000 description 1
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- 230000003111 delayed effect Effects 0.000 description 1
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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
- F03D7/0224—Adjusting blade pitch
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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
-
- 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
- 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
- F05B2270/109—Purpose of the control system to prolong engine life
- F05B2270/1095—Purpose of the control system to prolong engine life by limiting mechanical stresses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/322—Control parameters, e.g. input parameters the detection or prediction of a wind gust
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- 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
- F05B2270/40—Type of control system
- F05B2270/404—Type of control system active, predictive, or anticipative
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a gust control method, a gust control device, a gust control medium and a gust control system for a wind generating set, wherein the gust control method comprises the following steps: 1) Acquiring state signals of a wind generating set, wherein the state signals comprise at least two of wind speed, wind direction, generator rotating speed, generator acceleration, cabin vibration acceleration, pitch speed, generator torque change rate and generator power change rate; 2) Obtaining a correlation coefficient between the state information according to at least two kinds of state information; 3) Comparing the correlation coefficient with a preset threshold value; and when the correlation coefficient is not within the preset threshold value, judging that the wind generating set operates in a gust mode, and performing pitch motion. According to the wind power generation system, the wind gust is detected in advance based on the correlation coefficient, and the action of the pitch angle of the actuating mechanism is triggered in advance, so that the extreme blade load and tower overturning bending moment of the wind generating set under the condition of the correlated wind gust with the change of wind direction are reduced, and the safety and reliability of the wind generating set under the condition of the extreme wind gust are ensured.
Description
Technical Field
The invention mainly relates to the technical field of wind power generation, in particular to a wind gust control method, device, medium and system of a wind generating set.
Background
Because wind speed and wind direction changes have randomness and unpredictability in the normal operation power generation process of the wind generating set, if the wind speed changes are needed to be perceived in advance, a wind speed detection device such as a laser radar and the like is needed to be added, and the laser radar is added, so that larger cost is needed to be additionally added, and the economy faces larger challenges. In addition, along with the increase of the single-machine rated power and the diameter of a wind wheel of the wind generating set, under the extremely relevant gust state with direction change, the traditional control logic and monitoring means of the wind generating set are difficult to judge the relevant gust state of the wind generating set in advance due to the rapid change of the wind speed and the wind direction, and the action of a variable pitch actuator is slower, so that the limit bending moment of the hub center of the wind generating set and the overturning bending moment of a tower barrel are larger, the cost of a transmission chain, particularly a gearbox and the tower barrel of the wind generating set is greatly increased, and the reliability of the wind generating set is reduced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems existing in the prior art, the invention provides a wind generating set gust control method, device, medium and system for judging that a wind generating set operates under gust in advance and reducing blade load and tower overturning bending moment by triggering pitch motion in advance.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a gust control method of a wind generating set comprises the following steps:
1) Acquiring state signals of a wind generating set, wherein the state signals comprise at least two of wind speed, wind direction, generator rotating speed, generator acceleration, cabin vibration acceleration, pitch speed, generator torque change rate and generator power change rate;
2) Obtaining a correlation coefficient between the state information according to at least two kinds of state information;
3) Comparing the correlation coefficient with a preset threshold value; and when the correlation coefficient is not within the preset threshold value, judging that the wind generating set operates in a gust mode, and performing pitch motion to reduce the limit load of the blade.
Preferably, in step 3), when the correlation coefficient is not within a preset threshold, one or more auxiliary variables are introduced to perform auxiliary judgment; and comparing the one or more auxiliary variables with a preset auxiliary threshold value, and judging that the wind generating set operates in a gust mode when the one or more auxiliary variables are not in the corresponding preset auxiliary threshold value.
Preferably, the auxiliary variable comprises one or more of generator speed, nacelle vibration acceleration or wind direction yaw error angle.
Preferably, in step 3), the pitch speed is increased to a maximum pitch speed limit or set point while the pitch action is performed.
Preferably, in step 3), the generator torque is kept at rated torque while the pitch action is performed.
Preferably, in step 2), the specific calculation process of the correlation coefficient between the N kinds of state information is:
wherein β is a correlation coefficient between N variables, var1 is variable 1, var2 is variable 2, and Var is variable N, where Var variable is wind speed, wind direction, generator speed, generator acceleration, nacelle vibration acceleration, pitch speed, generator torque rate of change, or generator power rate of change; abs is absolute and Max is maximum.
Preferably, in step 2), the correlation coefficient includes a correlation coefficient between wind direction and generator acceleration, and the specific calculation process is:
wherein beta is a correlation coefficient between wind direction and generator acceleration; di r is wind direction, accGen is generator acceleration.
The invention also discloses a gust control device of the wind generating set, which comprises:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring state signals of a wind generating set, wherein the state signals comprise at least two of wind speed, wind direction, generator rotating speed, generator acceleration, cabin vibration acceleration, pitch speed, generator torque change rate and generator power change rate;
the computing module is used for obtaining a correlation coefficient between the state information according to at least two types of state information;
the judging module is used for comparing the correlation coefficient with a preset threshold value; and when the correlation coefficient is not within the preset threshold value, judging that the wind generating set operates in a gust mode, and performing pitch motion to reduce the limit load of the blade.
The invention further discloses a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, performs the steps of the method as described above. The invention also discloses a gust control system of the wind generating set, which comprises a memory and a processor, wherein the memory is stored with a computer program which executes the steps of the method when being run by the processor.
Compared with the prior art, the invention has the advantages that:
according to the invention, the corresponding correlation coefficient is obtained based on two or more groups of state information, and the correlation coefficient is used as a sufficient condition for detecting and judging the gust, so that whether the unit operates under the gust condition is judged in advance, and the extreme blade load and tower overturning bending moment of the wind generating set under the correlated gust condition with the change of wind direction are reduced by triggering the action of the pitch angle of the actuating mechanism in advance, thereby ensuring the safety and reliability of the wind generating set under the extreme gust condition.
The auxiliary judgment is carried out through the introduced auxiliary variable, so that the judgment accuracy under the condition of gust can be greatly improved, and false actions of the pitch angle under the normal running condition can be effectively avoided.
Drawings
Fig. 1 is a flowchart of a control method according to an embodiment of the present invention.
Fig. 2 is a univariate variation trend chart in the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
As shown in fig. 1, the wind generating set gust control method according to the embodiment of the invention includes the steps of:
1) Acquiring state signals of a wind generating set, wherein the state signals comprise at least two of wind speed, wind direction, generator rotating speed, generator acceleration, cabin vibration acceleration, pitch speed, generator torque change rate and generator power change rate;
2) Obtaining a correlation coefficient between the state information according to at least two kinds of state information;
3) Comparing the correlation coefficient with a preset threshold value; and when the correlation coefficient is not within the preset threshold value, judging that the wind generating set operates in a gust mode, and performing pitch motion to reduce the limit load of the blade.
According to the wind power generation system, the corresponding correlation coefficient is obtained based on two or more sets of state information, and is used as a sufficient condition for detecting and judging the gust, and because one or more sets of state information are adopted for trend prediction of the gust state of the wind power generation system, the wind power generation system can judge that the gust is coming in advance compared with a single signal (such as rotating speed or acceleration), when the wind power generation system is judged to be coming in advance, the pitching action can be triggered and executed in advance, so that the extreme blade load and tower overturning bending moment of the wind power generation system under the extremely windy related gust condition are reduced, and the safety and reliability of the wind power generation system under the extremely gust condition are ensured.
In a specific embodiment, in step 3), when the correlation coefficient is not within the preset threshold, one or more auxiliary variables are introduced to perform auxiliary judgment; and comparing the one or more auxiliary variables with a preset auxiliary threshold value, and judging that the wind generating set operates in the gust mode when the one or more auxiliary variables are not in the corresponding preset auxiliary threshold value. Wherein the auxiliary variable comprises one or more of generator rotational speed, nacelle vibration acceleration, or wind direction yaw error angle. In the actual unit operation process, the auxiliary variables are used as auxiliary judgment conditions, so that misoperation of the pitch control system is avoided or the misoperation of the pitch control system is reduced as far as possible.
The auxiliary judgment is carried out through the introduced auxiliary variable, so that the judgment accuracy under the condition of gust can be greatly improved, and false actions of the pitch angle under the normal running condition can be effectively avoided.
In a specific embodiment, in step 3), while performing the pitch action, the pitch speed is increased to a maximum pitch speed limit or set point, the generator torque is kept at a rated torque, and the generator set operating speed is reduced according to the pitch angle, thereby reducing the blade limit load of the wind turbine set in the case of an extremely directional changing correlated gust.
In a specific embodiment, in step 2), the correlation calculation method is as follows:
for arbitrary discrete time series { X } 1 、X 2 、X 3 、X 4 ……X n }，x t And x t+k Corresponding to the two sets of samples respectively. k is the number of sample lags, k is a positive integer greater than or equal to 1 and is less than the sample Δt period). X is x t For sampling data { x } after a sample time sequence is delayed by k data in a period of time DeltaT 1 、x 2 、x 3 、x 4 、…x i …x t X is }, and t+k for sampling data { x over a period of time DeltaT 1+k +x 2+k +x 3+k 、…x i+k …x t+k The variation trend of the univariate is shown in fig. 2, and the correlation coefficient alpha is shown in the following formula:
wherein: x is x t+k A value at the time of the discrete time series (t+k); x is x t Is discreteA value at time t of the time series; x is x i+k -x i+k-1 For x in DeltaT period i+k Time of day and x i+k-1 Difference in time values; alpha is a univariate correlation trend coefficient, 0 is a weak correlation trend, and 1 is a strong correlation trend.
In a specific application, the specific calculation process of the correlation coefficient between the N kinds of state information is as follows:
wherein β is a correlation coefficient between N variables, var1 is variable 1, var2 is variable 2, and Var is variable N, where Var variable is wind speed, wind direction, generator speed, generator acceleration, nacelle vibration acceleration, pitch speed, generator torque rate of change, or generator power rate of change; abs is absolute and Max is maximum.
For example, the correlation coefficient is a correlation coefficient between wind direction and generator acceleration, and the specific calculation process is as follows:
where β is the correlation coefficient between wind direction and generator acceleration, dir is wind direction, accGen is generator acceleration.
According to the wind power generation system, the wind direction and the generator acceleration are obtained, the correlation coefficient of the time domain is calculated, the control system judges that the variable pitch actuator acts in advance according to the correlation coefficient, so that the limit load of the blade of the wind power generation unit under the condition of the correlation gust with the direction change of the extreme zone is reduced, the weight of the blade, the tower and the wind power generation unit system of the wind power generation unit is effectively reduced, and the economy of the wind power generation unit is improved.
In specific application, the wind gust state of the wind turbine can be identified by adopting correlation coefficients between two signals or three signals or more than two signals. Wherein standard values (preset thresholds) corresponding to different kinds of signals are different.
The embodiment of the invention also discloses a gust control system of the wind generating set, which comprises the following components:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring state signals of a wind generating set, wherein the state signals comprise at least two of wind speed, wind direction, generator rotating speed, generator acceleration, cabin vibration acceleration and generator power change rate;
the computing module is used for obtaining a correlation coefficient between the state information according to at least two types of state information;
the judging module is used for comparing the correlation coefficient with a preset threshold value; and when the correlation coefficient is not within the preset threshold value, judging that the wind generating set operates in a gust mode, and performing pitch motion to reduce the limit load of the blade.
The gust control system of the wind generating set, which is corresponding to the control method, has the advantages as described in the control method.
The invention collects signals such as wind speed, wind direction, generator rotating speed, cabin vibration acceleration and the like of the wind generating set through a main control controller of the wind generating set and corresponding sensing equipment, calculates the generator acceleration through the controller, and calculates correlation coefficients beta of two or more signals of the signals; when the correlation coefficient beta is larger than or equal to a set threshold value and the auxiliary variables (such as the rotating speed of the generator, the vibration acceleration of the engine room and the like) are judged to be larger than or equal to the set threshold value, the pitch actuating mechanism executes pitch action, the pitch speed is increased to a maximum pitch speed limiting value or a set value, the rated torque is given to the generator torque, and the running rotating speed of the unit is reduced according to the pitch angle. And when one of the conditions of the gust control judgment logic is smaller than the set threshold value, the gust control logic exits and the normal closed-loop operation control logic of the unit is executed.
Embodiments of the present invention further disclose a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of any of the above. The embodiment of the invention also discloses a gust control system of the wind generating set, which comprises a memory and a processor, wherein the memory is stored with a computer program which executes the steps of the method when being run by the processor.
As used in this disclosure and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (10)
1. The wind power generator set wind-gusting control method is characterized by comprising the following steps:
1) Acquiring state signals of a wind generating set, wherein the state signals comprise at least two of wind speed, wind direction, generator rotating speed, generator acceleration, cabin vibration acceleration, pitch speed, generator torque change rate and generator power change rate;
2) Obtaining a correlation coefficient between the state information according to at least two kinds of state information;
3) Comparing the correlation coefficient with a preset threshold value; and when the correlation coefficient is not within the preset threshold value, judging that the wind generating set operates in a gust mode, and performing pitch motion to reduce the limit load of the blade.
2. The method according to claim 1, wherein in step 3), when the correlation coefficient is not within a preset threshold, one or more auxiliary variables are introduced to perform auxiliary judgment; and comparing the one or more auxiliary variables with a preset auxiliary threshold value, and judging that the wind generating set operates in a gust mode when the one or more auxiliary variables are not in the corresponding preset auxiliary threshold value.
3. The wind generating set gust control method of claim 2, wherein the auxiliary variable comprises one or more of generator speed, nacelle vibration acceleration, or wind direction yaw error angle.
4. A method of controlling a wind park gust according to claim 1, 2 or 3, wherein in step 3) the pitch speed is increased to a maximum pitch speed limit or set value at the same time as the pitch action.
5. The method according to claim 4, wherein in step 3), the pitch operation is performed while maintaining the rated torque of the generator torque.
6. A wind generating set gust control method according to claim 1, 2 or 3, wherein in step 2), the specific calculation process of the correlation coefficient between N kinds of state information is:
wherein β is a correlation coefficient between N variables, var1 is variable 1, var2 is variable 2, and Var is variable N, where Var variable is wind speed, wind direction, generator speed, generator acceleration, nacelle vibration acceleration, pitch speed, generator torque rate of change, or generator power rate of change; abs is absolute and Max is maximum.
7. The method according to claim 6, wherein in step 2), the correlation coefficient includes a correlation coefficient between a wind direction and an acceleration of the generator, and the specific calculation process is:
wherein beta is a correlation coefficient between wind direction and generator acceleration; dir is wind direction, accGen is generator acceleration.
8. A wind turbine generator set gust control device, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring state signals of a wind generating set, wherein the state signals comprise at least two of wind speed, wind direction, generator rotating speed, generator acceleration, cabin vibration acceleration, pitch speed, generator torque change rate and generator power change rate;
the computing module is used for obtaining a correlation coefficient between the state information according to at least two types of state information;
the judging module is used for comparing the correlation coefficient with a preset threshold value; and when the correlation coefficient is not within the preset threshold value, judging that the wind generating set operates in a gust mode, and performing pitch motion to reduce the limit load of the blade.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, performs the steps of the method according to any one of claims 1-7.
10. A wind park gust control system comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the computer program, when run by the processor, performs the steps of the method according to any of claims 1-7.
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| CN202310160154.6A CN116085194A (en) | 2023-02-23 | 2023-02-23 | Gust control method, device, medium and system for wind generating set |
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| CN202310160154.6A CN116085194A (en) | 2023-02-23 | 2023-02-23 | Gust control method, device, medium and system for wind generating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117489526A (en) * | 2023-11-13 | 2024-02-02 | 中国电力工程顾问集团有限公司 | Fan operation method and device, electronic equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117489526A (en) * | 2023-11-13 | 2024-02-02 | 中国电力工程顾问集团有限公司 | Fan operation method and device, electronic equipment and storage medium |
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