CN109026555A - The method and apparatus of the stall of blade for identification - Google Patents
The method and apparatus of the stall of blade for identification Download PDFInfo
- Publication number
- CN109026555A CN109026555A CN201810922162.9A CN201810922162A CN109026555A CN 109026555 A CN109026555 A CN 109026555A CN 201810922162 A CN201810922162 A CN 201810922162A CN 109026555 A CN109026555 A CN 109026555A
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- Prior art keywords
- blade
- stall
- voice data
- noise
- multiple voice
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Classifications
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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
Abstract
The present invention relates to a kind of methods of stall of blade for identification, this method includes the following steps: to measure multiple voice datas by the microphone array being made of multiple microphones during blade is run, wherein at least one microphone arrangement in the microphone array is in tower close to the position of vane tip；The multiple voice data is handled；Processed the multiple voice data is analyzed to determine sound source position and noise level；Noise level is compared with noise threshold；And the alerting signal for indicating stall is provided in the case where noise level is more than noise threshold, wherein alerting signal further includes stall position.The invention further relates to a kind of devices of stall of blade for identification.By this method or the device, it can accurately identify stall and position blade or the blade position of stall, make it possible to adjust the angle of attack of blade according to the information to stop stall conditions.
Description
Technical field
Present invention is generally directed to wind power generation fields, more specifically, are related to a kind of stall of blade for identification
Method.Moreover, it relates to a kind of device of the stall of blade for identification.
Background technique
In recent years, clean energy resource field shows fast-developing trend.As the representative of clean energy resource, wind-driven generator
Using growing.The blade of wind-driven generator is the core component of wind-driven generator capture wind energy, and operating status is direct
It is related to equipment safety and generating efficiency.
A kind of abnormal operating condition of blade is stall.When the angle of attack of blade be lower than some critical value when, lift coefficient with
The angle of attack increase and it is linearly increasing.But after the angle of attack of blade is more than this critical value, lift coefficient increases with the angle of attack and is reduced.
Under stall conditions, since air-flow separation leads to blade strong disturbance, to cause decrease of power generation, it is also possible to lead to blade
Damage or safety accident.
At present to avoid stall, mostly by pitch control make blade mainly pneumatic functional area far from stall angle,
To have lost considerable aeroperformance.
Summary of the invention
The task of the present invention is provide a kind of method of the stall of blade for identification and a kind of mistake of blade for identification
Speed device can accurately identify stall by this method or the device and position blade or the blade position of stall so that
The angle of attack of blade can be adjusted according to the information to stop stall conditions.
In the first aspect of the present invention, the method for foregoing task one kind stall of blade for identification is solved, this method
Include the following steps:
Multiple voice datas are measured by the microphone array being made of multiple microphones during blade operation, wherein institute
At least one microphone arrangement in microphone array is stated in tower close to the position of vane tip；
The multiple voice data is handled；
Processed the multiple voice data is analyzed to determine sound source position and noise level；
Noise level is compared with noise threshold；And
The alerting signal for indicating stall is provided in the case where noise level is more than noise threshold, wherein alerting signal also wraps
Include stall position.
It is provided in a preferred embodiment of the invention, carrying out processing to the multiple voice data includes:
The voice data is filtered by the high-pass filter that cutoff frequency is 1000Hz；And/or
The voice data is filtered by postfilter and/or coherent filter.
By the preferred embodiment, low frequency electric machine noise can be filtered out, and in general low frequency electric machine noise is in 1000Hz
Below.Accuracy of identification can be improved by the filtering.It should be understood that can also be using the band with suitable upper cut off frequency
Bandpass filter.
It provides in another preferred embodiment of the invention, this method further comprises the steps of:
Determine whether noise is issued by blade according to sound source position.
Pass through the preferred embodiment, it is possible to reduce erroneous judgement.It, can essence since method of the invention uses microphone array
Really sound source is positioned, to judge whether sound source is leaf area.If not leaf area, then it can determine and do not occur
Stall.
It is provided in another preferred embodiment of the invention, analyzes processed the multiple voice data to determine sound source position
It sets and includes:
Processed the multiple voice data is analyzed to determine the plane coordinates of one or more sound sources in the spatial domain
Or space coordinate.
By the preferred embodiment, accurate auditory localization may be implemented.For example, in the voice data for passing through multiple microphones
Noise it is strong and weak and combine the installation site of each microphone, can determine relative position of the sound source relative to each microphone,
So that it is determined that the position of sound source.
It provides in another preferred embodiment of the invention, this method further comprises the steps of:
The pneumatic functional area that blade is adjusted according to alerting signal, so that the pneumatic functional area is in safe angle of attack model
It encloses.
By the preferred embodiment, the stall conditions of blade can be terminated, to improve generating efficiency and blade is avoided to damage
Wound.
It is provided in another preferred embodiment of the invention, this method further comprises the steps of:
Noise intensity is determined according to the multiple voice data；And
The operating condition of blade is determined according to noise intensity.
By the preferred embodiment, the operating condition of blade can be determined.Such as can determine the degree of blade stall, and whether
Damage etc..Determine that noise intensity can for example carry out in the following way: firstly, determining sound source position by multiple voice signals
It sets, the noise intensity of sound source is then determined according to corresponding sound data.
In the second aspect of the present invention, foregoing task is solved by a kind of device of stall of blade for identification, should
Device includes
The microphone array being made of multiple microphones, the microphone array are configured as measuring during blade is run
Multiple voice datas, wherein at least one microphone arrangement in the microphone array is in the tower close to vane tip；
Controller, the controller are configured as executing following movement:
The multiple voice data is handled；
Processed the multiple voice data is analyzed to determine sound source position and noise level；
Noise level is compared with noise threshold；And
The alerting signal for indicating stall is provided in the case where noise level is more than noise threshold,
Wherein alerting signal further includes stall position.
It is provided in a preferred embodiment of the invention, which further includes actuator, and the actuator is configured as root
According to the pneumatic functional area of alerting signal adjustment blade, so that the pneumatic functional area is in safe range of angles of attack.
By the preferred embodiment, the stall conditions of blade can be terminated, to improve generating efficiency and blade is avoided to damage
Wound.
The present invention at least has following the utility model has the advantages that (1) is by the invention it is possible to be accurately determined stall, this is to be based on
The following uniqueness of inventor is seen clearly: when stall occurs in blade, will generate larger and unique noise, therefore multiple by utilizing
Microphone measurement noise can provide enough voice datas, to accurately identify stall conditions；(2) through the invention, may be used
To position blade or the blade position of stall, this is because the present invention is surveyed using the multiple microphones arranged at different locations
Measure noise, so as to by the position of measured multiple voice datas and corresponding microphone come localization of sound source, thus really
Determine stall position.
Detailed description of the invention
With reference to specific embodiment, the present invention is further explained with reference to the accompanying drawing.
Fig. 1 shows the principle of the method for the stall of blade for identification；And
Fig. 2 shows the schematic diagrames of the device of the stall of blade for identification.
Specific embodiment
It should be pointed out that each component in each attached drawing may be shown in which be exaggerated in order to illustrate, and it is not necessarily ratio
Example is correctly.In the drawings, identical appended drawing reference is equipped with to the identical component of identical or function.
In the present invention, unless otherwise indicated, " on being arranged in ... ", " being arranged in ... top " and " on being arranged in ... "
Do not exclude the case where there are intermediaries therebetween.
In the present invention, each embodiment is intended only to illustrate the solution of the present invention, and is understood not to restrictive.
In the present invention, unless otherwise indicated, quantifier "one", " one " and the scene for not excluding element.
It is also noted herein that in an embodiment of the present invention, for it is clear, for the sake of simplicity, might show only one
Sub-unit or component, but those skilled in the art are it is understood that under the teachings of the present invention, it can be according to concrete scene
Need to add required component or component.
It is also noted herein that within the scope of the invention, the wording such as " identical ", " equal ", " being equal to " are not meant to
The two numerical value is absolutely equal, but allows certain reasonable error, that is to say, that the wording also contemplated " substantially phase
Together ", " being essentially equal ", " being substantially equal to ".
In addition, the number of the step of each method of the invention limit the method step execute sequence.Unless special
It does not point out, the method step can be executed with different order.
Fig. 1 shows the principle of the method for the stall of blade for identification.
Three kinds of operating conditions of blade: the critical operating condition of a. nominal situation, b. and c. stall condition are shown in FIG. 1.
The solution of the present invention is seen clearly based on the following uniqueness of inventor: blade is the core component of blower capture wind energy, is
The different wind-resources environment of adaptation, therefore, to assure that mainly pneumatic functional area is in the aerodynamic configuration of blade in the process of running
The safe range of angles of attack of aerofoil profile；At safe range of angles of attack (referring to a. nominal situation), the lift of aerofoil profile with the increase of the angle of attack and
Linear to increase, when the angle of attack increases to some critical value (referring to the critical operating condition of b.), lift is up to maximum, but at the same time due to
Strong disturbance caused by air-flow separation etc., lift will be very unstable, and generate larger noise, while with energy loss；It attacks
When angle continues to increase, a small angle of attack increment will will lead to the rapid huge decline of lift, (be lost into stall conditions referring to c.
Fast operating condition), noise is very big at this time；If blade mainly pneumatic functional area large area reasonable time interior aerofoil profile all in this
A exception angle of attack region, the aeroperformance of entire blade can decline rapidly, and shake with biggish load；It is multiple by arranging
Microphone can more accurately determine the noise spectrum (such as can exclude noise of motor, other unrelated noises etc.) of corresponding position,
And its noise characteristic spectrum with stall conditions is compared, to accurately determine fault state, while can also be from described
Sound source position is determined in the voice data of multiple microphones and thereby determines that blade or the blade position of stall, so as to more quasi-
Really adjust the angle of attack of respective vanes to avoid or stop stall conditions.
Fig. 2 shows the schematic diagrames of the device 100 of the stall of blade for identification.
As shown in Fig. 2, device 100 include be arranged on wind-driven generator by multiple microphones 102,103,104,105
The microphone array of composition, in which:
Microphone 102 and 103 is arranged on pylon 106 at the position at the tip of blade 101 just to acquire blade
Because of noise caused by stall vibration at 101 tip, wherein microphone 102 is closest to the tip of blade 101, and microphone 103 times
It.By the way that microphone 102,103 to be arranged on pylon 106 at the position at the tip of blade 101, can preferably acquire
Stall noise, because the meeting high vibration of blade 101 simultaneously deforms, and the deformation at the tip of blade 101 is often under stall conditions
Maximum, therefore noise also can be clearest, therefore can acquire clearest stall noise in its attachment cloth microphone for place
Reason and analysis use.
Microphone 104 is arranged in cabin 107 noise and machine noise at the root to acquire blade 101.It is logical
Acquisition machine noise is crossed, machine noise can be excluded in voice data collected.
Microphone 105 is arranged on pylon 106 at the position at the middle part of blade 101 to acquire in blade 101
Noise at portion.
By forming the microphone 102-105 of microphone array, making an uproar at the tip, middle part and root of blade can be acquired
Sound, to preferably determine sound source position and preferably determine blade and the stalled blade position of stall.
Device 100 further includes controller (not shown).Controller can both be arranged in wind-driven generator, such as cabin or wheel
It in hub, can also be arranged at separate wind-driven generator, be, for example, remote control computer.
Controller is configured as executing following movement:
The multiple voice datas exported by microphone 102-105 are handled.The processing is put including filtering, signal
It is big etc..Filtering may include filtering out machine noise, such as 1000Hz low frequency below using bandpass filter or high-pass filter
Noise.
Processed the multiple voice data is analyzed to determine sound source position and noise level.Determine the side of sound source
Formula is for example are as follows: determines the noise type and noise intensity (such as using sound level meter) in each voice data；Exclude non-stall make an uproar
Sound and according to the location estimation sound source position of the noise intensity of each microphone and corresponding microphone, for example in the spatial domain really
The plane coordinates or space coordinate of fixed one or more sound source.
Noise level is compared with noise threshold.Herein, this compares either by the noise water at single time point
Flat or noise intensity is also possible to the noise level for acquiring multiple time points and stall noise compared with single noise threshold
Multiple noise thresholds in characteristic spectrum compare, to more accurately determine stall scene.
The alerting signal for indicating stall is provided in the case where noise level is more than noise threshold, wherein alerting signal is also
Including stall position.The alerting signal for example may include sound, light, haptic signal.Here, the stall indicated by alerting signal
Either referring to true stall, it can also refer to semistalled condition, that is i.e. by the state of stall, to give staff
Or system reserves the time of reaction anticipation to prevent stall.
Finally, device 100 can also include actuator (not shown), such as electric motor.The actuator is configured as root
The pneumatic functional area of blade is adjusted according to alerting signal, such as stall conditions and stall position, so that the pneumatic functional area
In safe range of angles of attack.Such as the angle of attack of adjustable blade, to change or avoid stall conditions.
The present invention at least has following the utility model has the advantages that (1) is by the invention it is possible to be accurately determined stall, this is to be based on
The following uniqueness of inventor is seen clearly: when stall occurs in blade, will generate larger and unique noise, therefore multiple by utilizing
Microphone measurement noise can provide enough voice datas, to accurately identify stall conditions；(2) through the invention, may be used
To position blade or the blade position of stall, this is because the present invention is surveyed using the multiple microphones arranged at different locations
Measure noise, so as to by the position of measured multiple voice datas and corresponding microphone come localization of sound source, thus really
Determine stall position.
Although some embodiments of the present invention are described in present specification, those skilled in the art
Member is it is understood that these embodiments are merely possible to shown in example.Those skilled in the art under the teachings of the present invention may be used
To expect numerous variant schemes, alternative solution and improvement project without beyond the scope of this invention.The appended claims purport
It is limiting the scope of the invention, and is covering the method in the range of these claims itself and its equivalents and knot whereby
Structure.
Claims (8)
1. a kind of method of the stall of blade for identification, including the following steps:
Multiple voice datas are measured by the microphone array being made of multiple microphones during blade operation, wherein the wheat
At least one microphone arrangement in gram wind array is in tower close to the position of vane tip；
The multiple voice data is handled；
Processed the multiple voice data is analyzed to determine sound source position and noise level；
Noise level is compared with noise threshold；And
The alerting signal for indicating stall is provided in the case where noise level is more than noise threshold, wherein alerting signal further includes losing
Fast position.
2. according to the method described in claim 1, wherein to the multiple voice data carry out processing include:
The voice data is filtered by the high-pass filter that cutoff frequency is 1000Hz；And/or
The voice data is filtered by postfilter and/or coherent filter.
3. according to the method described in claim 1, further comprising the steps of:
Determine whether noise is issued by blade according to sound source position.
4. according to the method described in claim 1, analyzing processed the multiple voice data wherein to determine sound source position
Include:
Processed the multiple voice data is analyzed to determine the plane coordinates or sky of one or more sound sources in the spatial domain
Between coordinate.
5. according to the method described in claim 1, further comprising the steps of:
The pneumatic functional area that blade is adjusted according to alerting signal, so that the pneumatic functional area is in safe range of angles of attack.
6. according to the method described in claim 1, further comprising the steps of:
Noise intensity is determined according to the multiple voice data；And
The operating condition of blade is determined according to noise intensity.
7. a kind of device of the stall of blade for identification, comprising:
The microphone array being made of multiple microphones, the microphone array are configured as measuring during blade is run multiple
Voice data, wherein at least one microphone arrangement in the microphone array is in the tower close to vane tip；
Controller, the controller are configured as executing following movement:
The multiple voice data is handled；
Processed the multiple voice data is analyzed to determine sound source position and noise level；
Noise level is compared with noise threshold；And
The alerting signal for indicating stall is provided in the case where noise level is more than noise threshold,
Wherein alerting signal further includes stall position.
8. device according to claim 7 further includes actuator, the actuator is configured as being adjusted according to alerting signal
The pneumatic functional area of blade, so that the pneumatic functional area is in safe range of angles of attack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810922162.9A CN109026555B (en) | 2018-08-14 | 2018-08-14 | Method and apparatus for identifying stall of blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810922162.9A CN109026555B (en) | 2018-08-14 | 2018-08-14 | Method and apparatus for identifying stall of blade |
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| Publication Number | Publication Date |
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| CN109026555A true CN109026555A (en) | 2018-12-18 |
| CN109026555B CN109026555B (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810922162.9A Active CN109026555B (en) | 2018-08-14 | 2018-08-14 | Method and apparatus for identifying stall of blade |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746929A (en) * | 2019-10-31 | 2021-05-04 | 江苏金风科技有限公司 | Blade stall monitoring method, device, equipment and storage medium |
| CN112855457A (en) * | 2019-11-12 | 2021-05-28 | 江苏金风科技有限公司 | Stall monitoring system and method and blade |
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| CN102494894A (en) * | 2011-11-17 | 2012-06-13 | 高丙团 | Audio monitoring and fault diagnosis system for wind generating set and audio monitoring and fault diagnosis method for same |
| EP1972781B1 (en) * | 2006-11-17 | 2013-10-02 | REpower Systems SE | Vibration damping for a wind turbine plant |
| CN103528670A (en) * | 2012-06-28 | 2014-01-22 | 西门子公司 | Stall detection of wind turbine blades |
| CN207195098U (en) * | 2017-07-31 | 2018-04-06 | 上海绿孚科技有限公司 | A kind of blade state monitoring system of the wind power generating set based on acoustic processing |
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2018
- 2018-08-14 CN CN201810922162.9A patent/CN109026555B/en active Active
Patent Citations (4)
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| EP1972781B1 (en) * | 2006-11-17 | 2013-10-02 | REpower Systems SE | Vibration damping for a wind turbine plant |
| CN102494894A (en) * | 2011-11-17 | 2012-06-13 | 高丙团 | Audio monitoring and fault diagnosis system for wind generating set and audio monitoring and fault diagnosis method for same |
| CN103528670A (en) * | 2012-06-28 | 2014-01-22 | 西门子公司 | Stall detection of wind turbine blades |
| CN207195098U (en) * | 2017-07-31 | 2018-04-06 | 上海绿孚科技有限公司 | A kind of blade state monitoring system of the wind power generating set based on acoustic processing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746929A (en) * | 2019-10-31 | 2021-05-04 | 江苏金风科技有限公司 | Blade stall monitoring method, device, equipment and storage medium |
| CN112855457A (en) * | 2019-11-12 | 2021-05-28 | 江苏金风科技有限公司 | Stall monitoring system and method and blade |
| CN112855457B (en) * | 2019-11-12 | 2022-08-12 | 江苏金风科技有限公司 | Stall monitoring system and method and blade |
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| CN109026555B (en) | 2020-12-01 |
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Address after: Shen Gang street of Jiangyin city in Jiangsu province 214443 Wuxi city Shen Zhuang Road No. 3 Applicant after: Vision Energy Co.,Ltd. Address before: Shen Gang street of Jiangyin city in Jiangsu province 214443 Wuxi city Shen Zhuang Road No. 3 Applicant before: Envision Energy (Denmark) APS |
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