CN113217296A - Method for detecting and correcting unbalance of wind wheel of wind turbine generator - Google Patents
Method for detecting and correcting unbalance of wind wheel of wind turbine generator Download PDFInfo
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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
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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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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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
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- Fluid Mechanics (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a method for detecting and correcting unbalance of a wind wheel of a wind turbine generator, which comprises the steps of utilizing a cabin acceleration sensor of the wind turbine generator, continuously adjusting the variable pitch angle of each blade under the condition that the set reaches rated power (the purpose of reaching the rated power is to compare frequency spectrum amplitude under the same condition), keeping the same time and recording the time for each adjustment, analyzing and comparing the frequency spectrum amplitude of a corresponding cabin acceleration signal of each angle adjustment, selecting the corresponding variable pitch angle of each blade when the frequency spectrum amplitude is minimum, and compensating and correcting the variable pitch angle of the corresponding blade, so that the problem of unbalance of the wind wheel can be solved. The method can judge whether the unit has the unbalanced wind wheel phenomenon without additionally installing any equipment, and can solve the unbalanced wind wheel phenomenon by only adjusting the variable pitch angle and analyzing the unit data without additionally installing any equipment, thereby saving equipment purchasing cost and having high efficiency.
Description
Technical Field
The invention relates to the technical field of wind turbine generators, in particular to a method for detecting and correcting unbalance of a wind turbine generator.
Background
The wind turbine generator generally comprises three blades, and the wind turbine generator can only stably operate if the operating angles and postures of the three blades are completely consistent, so that the phenomenon of unbalanced wind wheels can be caused by the following reasons.
Firstly, the installation angles of the three blades may have differences, because the installation angles are determined manually, a visual error occurs, and because the existing blades are longer and longer, the tiny installation angle errors of the blades can be amplified, so that an obvious imbalance phenomenon is generated;
secondly, due to the difference of the manufacturing process, the rigidity of each blade is different, and under the action of wind, the deformation of the three blades is inconsistent, so that the unbalance phenomenon is generated.
The damage of unbalance of the wind wheel is great, firstly, the vibration of the unit is increased, and fasteners such as important parts or bolts and the like fail in advance due to fatigue increase, so that the service life and the safety of the unit are influenced; secondly, because the wind wheel is unbalanced, the effect of absorbing wind energy can be influenced, the generating capacity is influenced, and economic loss is caused.
In the prior art, a camera is erected on the ground through a tripod, a unit is stopped, the unit idles at a slow speed, photographs of each blade passing through a vertically downward position are taken, the angle difference of each blade is identified through an image identification mode, and then the angle difference is adjusted to be consistent.
The prior art scheme has the following defects:
1. the image recognition looks very high, but the use of the image recognition is limited, for example, the blade is very long, the length of the current blade reaches 100 meters, it is unrealistic to erect a camera on the ground, so that the outline of the whole blade is clearly shot, and the focusing is a difficult problem;
2. the length of the blade is very long, and the strength of each blade at the same section is different due to the difference of the manufacturing process of the blade, so that the deformation of each blade at the same section is different during the operation of the blade, and the profile of each blade cannot be completely consistent no matter how the angle is adjusted through the profile identification;
3, the image recognition method is carried out in a static state of the unit, the blades are not subjected to wind load, even if the contours can be recognized and adjusted to be in a consistent state at the moment, after the unit operates, the blades deform under the action of the wind load, and the contours of the three blades cannot be kept consistent, so that the checking cannot be carried out.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an accurate and reliable method for detecting and correcting unbalance of a wind wheel of a wind turbine generator, and can effectively solve the problem of unbalance of the wind wheel.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a method for detecting and correcting unbalance of a wind wheel of a wind turbine generator is based on the following principles:
whether the wind wheel is unbalanced due to inconsistent deformation caused by the difference of blade manufacturing processes or the wind wheel is unbalanced due to the difference of blade installation angles, the imbalance of the wind wheel is finally reflected on the whole unit, the common characteristic is that a frequency consistent with the rotating frequency of the wind wheel exists, the frequency is called the rotating frequency, the larger the amplitude of the rotating frequency is, the more serious the imbalance of the wind wheel is, and if the wind wheel reaches the ideal balance, the amplitude of the rotating frequency is close to zero;
based on the principle, the method comprises the steps of continuously adjusting the variable pitch angle of each blade by utilizing a cabin acceleration sensor of a wind turbine generator under the condition that the unit reaches rated power, keeping the same time and recording the same time for each adjustment, analyzing and comparing the frequency spectrum amplitude of a cabin acceleration signal corresponding to each angle adjustment, selecting the variable pitch angle of each corresponding blade when the frequency spectrum amplitude is minimum, and compensating and correcting the variable pitch angle of the corresponding blade, so that the problem of unbalance of a wind wheel can be solved; the purpose of adjusting the variable pitch angle under the condition that the unit reaches rated power is to compare the frequency spectrum amplitude under the same condition and ensure comparability.
Further, the method for detecting and correcting the unbalance of the wind wheel of the wind turbine generator set has the following specific scheme:
when the wind speed is relatively stable and the unit reaches the rated power, the angle adjustment of the individual blades is executed, so that the purpose that whether the angle of each blade is increased or decreased is found to be favorable for optimizing the imbalance of the wind wheel, specifically, the following steps are carried out:
the working condition 0 is that firstly, the angles of all the blades are kept unchanged, the blades are operated for a specific time, the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor is analyzed, and the purpose of the working condition is to find a reference value;
under the working condition 1, adding a preset value 1 to the angle of the first blade, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is lower than the working condition 0;
under the working condition 2, adding a preset value 2 to the angle of the first blade, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is lower than that under the working condition 1;
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the method comprises the following steps that under a working condition n, a preset value n is added to the angle of a first blade, the first blade runs for a specific time, the frequency spectrum amplitude of the rotating frequency of an acceleration sensor of the engine room is analyzed, if the frequency spectrum amplitude is higher than that of the last working condition at the moment, the last working condition, namely the working condition n-1 is suitable, the fact that the preset value n-1 is added to the first blade is beneficial to optimizing unbalance of a wind wheel, the angle of the first blade is not added, and the angle of the first blade is reduced under the working condition n + 1;
under the working condition n +1, reducing the angle of the first blade by a preset value 1, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is higher than the working condition 0;
under the working condition n +2, reducing the angle of the first blade by a preset value 2, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is higher than the working condition n + 1;
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under the working condition n + m, reducing the angle of the first blade by a preset value m, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and if the frequency spectrum amplitude is higher than that of the last working condition at the moment, indicating that the angle reduction of the first blade is unfavorable for optimizing the unbalance of the wind wheel, and starting to perform the same operation on other blades without reducing the angle of the first blade;
after the operation is completed, the frequency spectrum amplitude values of all working conditions are drawn together, the conditions can be known through comparison, each blade is favorable for optimizing the unbalance of the wind wheel by adding or subtracting the angle, the blade enters the angle adjustment of the next wheel, the corresponding blade pitch angle when the frequency spectrum amplitude value is the minimum is selected, the angle is the best angle for correcting the unbalance of the wind wheel, the pitch angle of the corresponding blade is compensated and corrected according to the best angle, and the unbalance problem of the wind wheel can be solved.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the wind wheel imbalance detection method has the advantages that whether the unit has the imbalance phenomenon of the wind wheel can be judged without additionally installing any equipment, the imbalance phenomenon of the wind wheel can be solved only by adjusting the pitch angle and analyzing unit data without additionally installing any equipment, equipment purchasing cost is saved, and efficiency is high.
2. No matter the wind wheel is unbalanced due to inconsistent deformation caused by the difference of the manufacturing process of the blades or the wind wheel is unbalanced due to the difference of the installation angles of the blades, the judgment and the correction are carried out through the frequency spectrum amplitude in the normal operation process of the unit, all process error factors are eliminated, and the accuracy and the reliability are high.
Drawings
Fig. 1 is one of schematic structural diagrams of a wind turbine.
Fig. 2 is a second schematic structural diagram of the wind turbine.
Fig. 3 is a diagram of a spectrum analysis of a rotation frequency.
Fig. 4 is a flow chart of detecting imbalance of a wind wheel.
FIG. 5a is a diagram of an individual vane angle adjustment condition.
FIG. 5b is a graph of the operating condition of single blade angle adjustment versus the frequency rotation amplitude.
FIG. 6a is a diagram of the combined blade angle adjustment condition (i.e., compensation modification of the pitch angle of the corresponding blade).
FIG. 6b is a diagram of the operating condition of the combined vane angle adjustment and the frequency conversion amplitude.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
The method for detecting and correcting imbalance of the wind wheel of the wind turbine generator set provided by the embodiment is based on the following principle:
whether the wind wheel is unbalanced due to inconsistent deformation caused by the difference of blade manufacturing processes or the wind wheel is unbalanced due to the difference of blade installation angles, the imbalance of the wind wheel is finally reflected on the whole unit, the common characteristic is that a frequency consistent with the rotating frequency of the wind wheel exists, the frequency is called the rotating frequency, the larger the amplitude of the rotating frequency is, the more serious the imbalance of the wind wheel is, and if the wind wheel reaches the ideal balance, the amplitude of the rotating frequency is basically close to zero;
based on the principle, the method includes that a cabin acceleration sensor of a wind turbine generator is utilized, under the condition that the unit reaches rated power (the purpose of reaching the rated power is to compare frequency spectrum amplitude under the same condition and ensure comparability), the variable pitch angle of each blade is continuously adjusted according to a plan, the same time is kept and the recorded time is kept for each adjustment, the frequency spectrum amplitude of a corresponding cabin acceleration signal of each angle adjustment is analyzed and compared, then the variable pitch angle of each corresponding blade is selected when the frequency spectrum amplitude is minimum, compensation correction is carried out on the variable pitch angle of the corresponding blade, and the problem of imbalance of a wind wheel can be solved.
Referring to fig. 1 and 2, the wind turbine generator includes a tower 1, three blades 2, a hub 3, a nacelle 4, and a nacelle acceleration sensor 5, where the three blades 2 are connected to the hub 3, angles of the three blades 2 can be adjusted, and when the wind turbine generator operates, the angles of the three blades 2 are generally about zero degrees.
Ideally, the angles of the three blades 2 are completely consistent, and the deformations are also consistent, so that the wind wheel surface formed by the rotation of the three blades 2 is balanced, and the frequency spectrum amplitude of the rotation frequency is close to zero in the frequency spectrum of the nacelle acceleration sensor 5 installed inside the nacelle 4.
If the spectral amplitude has been kept at a relatively low level before the angle of the blades 2 is adjusted, this indicates that the rotor of the unit is relatively balanced and no angle adjustment is required.
However, when the three blades 2 are deformed inconsistently due to manufacturing process differences or the wind turbine is unbalanced due to installation angle differences of the three blades 2, the frequency spectrum amplitude of the rotating frequency in the frequency spectrum of the nacelle acceleration sensor 5 is relatively large, as shown in fig. 3.
According to the above theory, a flow for detecting imbalance of the wind wheel is set in the control program, as shown in fig. 4, when the wind speed is relatively stable and the unit reaches the rated power, the angle adjustment of the individual blades is performed, so as to find whether each blade is angled or angled, which is beneficial to optimizing the imbalance of the wind wheel, specifically as follows:
under the working condition 0, firstly, keeping the angles of the three blades unchanged, running for 10 minutes, and analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, wherein the purpose of the working condition is to find a reference value;
under the working condition 1, adding 0.2 degree to the angle of the first blade, running for 10 minutes, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is lower than the working condition 0;
working condition 2, adding 0.4 degree to the angle of the first blade, running for 10 minutes, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is lower than that of the working condition 1;
working condition 3, adding 0.6 degree to the angle of the first blade, running for 10 minutes, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is lower than that of the working condition 2;
under the working condition 4, adding 0.8 degree to the angle of the first blade, running for 10 minutes, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and if the frequency spectrum amplitude is higher than the working condition 3, indicating that the working condition 3 is more appropriate, indicating that adding 0.6 degree to the first blade is beneficial to optimizing the unbalance of the wind wheel, adding the angle to the first blade no longer and beginning to reduce the angle under the working condition 5;
working condition 5, reducing the angle of the first blade by 0.2 degrees, operating for 10 minutes, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude is higher than the working condition 0;
working condition 6, reducing the angle of the first blade by 0.4 degrees, operating for 10 minutes, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude is higher than the working condition 5;
working condition 7, reducing the angle of the first blade by 0.6 degrees, running for 10 minutes, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, if the frequency spectrum amplitude is higher than the working condition 6 at the moment, indicating that the angle reduction of the first blade is unfavorable for optimizing the unbalance of the wind wheel, not reducing the angle of the first blade any more, and starting to perform similar operation on the second blade and the third blade;
after the operation is completed, the frequency spectrum amplitude values of all working conditions are drawn together, as shown in fig. 5a and fig. 5b, the comparison can be known, the angle adding of the first blade and the angle subtracting of the third blade are favorable for optimizing the unbalance of the wind wheel, and the angle adjusting of the second blade has little meaning on optimizing the unbalance of the wind wheel.
And (5) entering the angle adjustment of the combined blade of the next wheel, namely compensating and correcting the variable pitch angle of the corresponding blade.
Under the working condition 21, the angle of the first blade is increased by 0.4 degree, the angle of the third blade is decreased by 0.4 degree, and the operation is carried out for 10 minutes;
under the working condition 22, the angle of the first blade is increased by 0.6 degree, the angle of the third blade is decreased by 0.4 degree, and the operation is carried out for 10 minutes;
under the working condition 23, the angle of the first blade is increased by 0.4 degree, the angle of the third blade is decreased by 0.6 degree, and the operation is carried out for 10 minutes;
under the working condition 24, the angle of the first blade is increased by 0.6 degree, the angle of the third blade is decreased by 0.6 degree, and the operation is carried out for 10 minutes;
the spectral amplitude of the rotational frequency of the nacelle acceleration sensor is analyzed and compared as shown in fig. 6a and 6 b.
It can be concluded that adding 0.4 degrees to the angle of the first blade and subtracting 0.6 degrees from the angle of the third blade is the best angle value for correcting the imbalance of the wind wheel.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (2)
1. A method for detecting and correcting unbalance of a wind wheel of a wind turbine generator is characterized by being based on the following principles:
whether the wind wheel is unbalanced due to inconsistent deformation caused by the difference of blade manufacturing processes or the wind wheel is unbalanced due to the difference of blade installation angles, the imbalance of the wind wheel is finally reflected on the whole unit, the common characteristic is that a frequency consistent with the rotating frequency of the wind wheel exists, the frequency is called the rotating frequency, the larger the amplitude of the rotating frequency is, the more serious the imbalance of the wind wheel is, and if the wind wheel reaches the ideal balance, the amplitude of the rotating frequency is close to zero;
based on the principle, the method comprises the steps of continuously adjusting the variable pitch angle of each blade by utilizing a cabin acceleration sensor of a wind turbine generator under the condition that the unit reaches rated power, keeping the same time and recording the same time for each adjustment, analyzing and comparing the frequency spectrum amplitude of a cabin acceleration signal corresponding to each angle adjustment, selecting the variable pitch angle of each corresponding blade when the frequency spectrum amplitude is minimum, and compensating and correcting the variable pitch angle of the corresponding blade, so that the problem of unbalance of a wind wheel can be solved; the purpose of adjusting the variable pitch angle under the condition that the unit reaches rated power is to compare the frequency spectrum amplitude under the same condition and ensure comparability.
2. The method for detecting and correcting imbalance of a rotor of a wind turbine according to claim 1, wherein the individual blade angle adjustment is performed when the wind speed is relatively steady and the wind turbine reaches the rated power, in order to find whether each blade is angled or angled to be beneficial to optimizing the imbalance of the rotor, specifically as follows:
the working condition 0 is that firstly, the angles of all the blades are kept unchanged, the blades are operated for a specific time, the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor is analyzed, and the purpose of the working condition is to find a reference value;
under the working condition 1, adding a preset value 1 to the angle of the first blade, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is lower than the working condition 0;
under the working condition 2, adding a preset value 2 to the angle of the first blade, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is lower than that under the working condition 1;
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the method comprises the following steps that under a working condition n, a preset value n is added to the angle of a first blade, the first blade runs for a specific time, the frequency spectrum amplitude of the rotating frequency of an acceleration sensor of the engine room is analyzed, if the frequency spectrum amplitude is higher than that of the last working condition at the moment, the last working condition, namely the working condition n-1 is suitable, the fact that the preset value n-1 is added to the first blade is beneficial to optimizing unbalance of a wind wheel, the angle of the first blade is not added, and the angle of the first blade is reduced under the working condition n + 1;
under the working condition n +1, reducing the angle of the first blade by a preset value 1, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is higher than the working condition 0;
under the working condition n +2, reducing the angle of the first blade by a preset value 2, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and continuing the next step if the frequency spectrum amplitude at the moment is higher than the working condition n + 1;
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under the working condition n + m, reducing the angle of the first blade by a preset value m, operating for a specific time, analyzing the frequency spectrum amplitude of the rotating frequency of the cabin acceleration sensor, and if the frequency spectrum amplitude is higher than that of the last working condition at the moment, indicating that the angle reduction of the first blade is unfavorable for optimizing the unbalance of the wind wheel, and starting to perform the same operation on other blades without reducing the angle of the first blade;
after the operation is completed, the frequency spectrum amplitude values of all working conditions are drawn together, the conditions can be known through comparison, each blade is favorable for optimizing the unbalance of the wind wheel by adding or subtracting the angle, the blade enters the angle adjustment of the next wheel, the corresponding blade pitch angle when the frequency spectrum amplitude value is the minimum is selected, the angle is the best angle for correcting the unbalance of the wind wheel, the pitch angle of the corresponding blade is compensated and corrected according to the best angle, and the unbalance problem of the wind wheel can be solved.
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| CN202110250626.8A CN113217296A (en) | 2021-03-08 | 2021-03-08 | Method for detecting and correcting unbalance of wind wheel of wind turbine generator |
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| CN202110250626.8A CN113217296A (en) | 2021-03-08 | 2021-03-08 | Method for detecting and correcting unbalance of wind wheel of wind turbine generator |
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| US20090266160A1 (en) * | 2008-04-24 | 2009-10-29 | Mike Jeffrey | Method and system for determining an imbalance of a wind turbine rotor |
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| CN106523299A (en) * | 2016-12-13 | 2017-03-22 | 浙江运达风电股份有限公司 | Stator current data driving based unbalance detecting method for blades of doubly-fed induction generator |
| CN107191339A (en) * | 2017-07-31 | 2017-09-22 | 上海电气风电集团有限公司 | Wind-driven generator group wind-wheel imbalance monitoring method |
| US20180142676A1 (en) * | 2015-04-23 | 2018-05-24 | Envision Energy (Denmark) Aps | Method of Correcting Rotor Imbalance and Wind Turbine Thereof |
| CN108644069A (en) * | 2018-04-27 | 2018-10-12 | 三重能有限公司 | Blade unbalance detection and device |
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2021
- 2021-03-08 CN CN202110250626.8A patent/CN113217296A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090266160A1 (en) * | 2008-04-24 | 2009-10-29 | Mike Jeffrey | Method and system for determining an imbalance of a wind turbine rotor |
| WO2016091254A1 (en) * | 2014-12-09 | 2016-06-16 | Cp.Max Rotortechnik Gmbh & Co.Kg | Method for the reduction of aerodynamic imbalances of wind turbines |
| US20180142676A1 (en) * | 2015-04-23 | 2018-05-24 | Envision Energy (Denmark) Aps | Method of Correcting Rotor Imbalance and Wind Turbine Thereof |
| CN106523299A (en) * | 2016-12-13 | 2017-03-22 | 浙江运达风电股份有限公司 | Stator current data driving based unbalance detecting method for blades of doubly-fed induction generator |
| CN107191339A (en) * | 2017-07-31 | 2017-09-22 | 上海电气风电集团有限公司 | Wind-driven generator group wind-wheel imbalance monitoring method |
| CN108644069A (en) * | 2018-04-27 | 2018-10-12 | 三重能有限公司 | Blade unbalance detection and device |
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Application publication date: 20210806 |