CN113790123A - Noise suppression system and method for wind turbine generator - Google Patents
Noise suppression system and method for wind turbine generator Download PDFInfo
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- CN113790123A CN113790123A CN202110911883.1A CN202110911883A CN113790123A CN 113790123 A CN113790123 A CN 113790123A CN 202110911883 A CN202110911883 A CN 202110911883A CN 113790123 A CN113790123 A CN 113790123A
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- 230000001629 suppression Effects 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000007613 environmental effect Effects 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000009191 jumping Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000012937 correction Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
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- 241001465754 Metazoa Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
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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
- 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
- F03D7/0296—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce noise emissions
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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
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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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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a wind turbine noise suppression system and a method, wherein the wind turbine noise suppression system is applied to a wind turbine, the wind turbine comprises an impeller system, a yaw system, a control system, a wind condition acquisition device and a tower, the wind turbine noise suppression system comprises a positioning device, an environmental noise acquisition device, a sound production device and a controller which are arranged in the wind turbine, a database is arranged in the controller, and geographical information of a region, where noise pollution of the periphery of the wind turbine is to be avoided, is prestored in the database. The noise suppression system and method for the wind turbine generator set actively reduce noise generated by the operation of the wind turbine generator set by adopting corresponding control measures for the wind turbine generator set at different places under operation conditions, and can ensure that the noise pollution influence during the operation of the wind turbine generator set is minimized on the premise of not influencing the power generation efficiency and the economic benefit.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a noise suppression system and method for a wind turbine generator.
Background
Wind power is a clean energy and is a new energy which is vigorously developed in the country in recent years. In the past, wind power projects are mainly distributed in areas with scarce human smoke, but with continuous development of onshore wind resources, part of wind power plant areas are endangered or related to residential areas or natural protection areas, particularly in recent years, application and construction of distributed wind power, and the following noise influence is not negligible.
The noise pollution sources of the wind turbine generator comprise blade noise, transmission chain mechanical noise, yaw mechanical noise, electrical noise and the like of the wind turbine generator in operation. As a novel environmental pollution, wind power noise pollution causes discomfort to sensitive people if not controlled lightly, and may also have adverse effects on human health, economic breeding, animal survival and the like in severe cases.
In order to reduce noise pollution caused by the operation of the wind turbine generator, some methods have been proposed in the prior art, for example, chinese patent application No. 201810480707.5 discloses a method and an apparatus for noise control of a wind turbine generator, which can reduce the noise pollution caused by the operation of the wind turbine generator to a certain extent, but can also adversely affect the power generation effect of the wind turbine generator.
Disclosure of Invention
The invention aims to design a brand-new wind turbine noise suppression system and method, which can eliminate the noise influence of the wind turbine to the maximum extent under the condition of not influencing the power generation efficiency and the economic benefit.
Therefore, in one aspect of the invention, a wind turbine noise suppression system is provided, wherein the wind turbine noise suppression system is applied to a wind turbine, and the wind turbine comprises an impeller system, a yaw system, a control system, a wind condition acquisition device and a tower; the wind turbine noise suppression system comprises a positioning device, an environmental noise acquisition device, a sound production device and a controller which are arranged in the wind turbine, wherein a database is arranged in the controller, and the periphery of the wind turbine is pre-stored with geographical information for avoiding noise pollution areas.
Optionally, in the wind turbine noise suppression system, the positioning device is integrated in the control system.
Optionally, in the noise suppression system for a wind turbine generator, the positioning device is independently configured in the wind turbine generator and transmits data in a communication manner with the control system.
Preferably, in the wind turbine noise suppression system, the environmental noise collection device is arranged outside the wind turbine nacelle in 4 orthogonal directions.
Preferably, in the wind turbine noise suppression system, the sound generating device is disposed below the tail of the nacelle cover of the wind turbine and at the center of the impeller system.
Optionally, in the above wind turbine noise suppression system, the controller is the control system itself of the wind turbine.
Optionally, in the noise suppression system for a wind turbine generator, the controller is an independent controller and transmits data in a communication manner with the control system.
Preferably, the wind turbine noise suppression system further comprises a correction noise acquisition device, and the correction noise acquisition device is arranged in the range of the peripheral noise pollution influence area of the wind turbine.
In addition, in another aspect of the present invention, a wind turbine noise suppression method implemented by using the wind turbine noise suppression system is provided, where the wind turbine noise suppression method includes the following steps:
s1, determining the geographic coordinates of the wind turbine generator by the positioning device, wherein the geographic coordinates comprise the longitude, the latitude and the altitude of the wind turbine generator;
s2, the controller acquires the diameter of the impeller of the wind turbine generator and the height of the tower;
s3, acquiring wind speed and wind direction information by the controller through a wind condition acquisition device;
s4, calculating and determining the peripheral noise pollution influence area of the wind turbine by the controller according to the geographic coordinates of the wind turbine determined in the step S1, the diameter and the height of the tower of the wind turbine obtained in the step S2 and the wind speed and wind direction information obtained in the step S3;
s5, the controller calls geographical information of a region where noise pollution is to be avoided around the wind turbine generator and prestored in a database of the controller;
s6, the controller calculates the intersection of the noise pollution influence area determined in the step S4 and the noise pollution avoidance area called in the step S5, and sets the intersection as the working area of the sound generating device;
and S7, the sound generating device works to send reverse sound waves for counteracting the environmental noise to the corresponding working area so as to compensate and eliminate the external environmental noise.
Preferably, in the wind turbine noise suppression method, the step S7 includes the following sub-steps:
s71, the controller judges whether the intersection set calculated in the step S6 is empty, if the intersection set is empty, the step S72 is skipped; if the intersection is not empty, go to step S73;
s72, the sounding device is in a standby state of not working;
s73, the controller detects whether the wind turbine is in an operation state, and if the wind turbine is in a non-operation state, the step goes to S72; if the wind turbine generator is in the running state, jumping to step S74;
s74, detecting the current external environment noise intensity by an environment noise acquisition device;
s75, the controller judges whether the current external environment noise intensity is larger than a preset threshold value, if the current external environment illumination intensity is not larger than the preset threshold value, the step S72 is skipped; if the current external environment noise intensity is larger than the preset threshold value, jumping to step S76;
and S76, the sound generating device is in a working state, and sends reverse sound waves for counteracting the environmental noise to the corresponding working area so as to compensate and eliminate the external environmental noise.
Preferably, in the wind turbine noise suppressing method, the step S76 includes:
step S761: the method comprises the steps that an environmental noise acquisition device detects sound waveforms of external environmental noise, wherein the sound waveforms comprise frequency, amplitude and phase;
step S762: the controller filters and processes the sound waveform of the external environment noise to generate a reverse waveform signal of the external environment noise and sends the reverse waveform signal to the sound generating device;
step S763: the sound generating device generates and emits reverse interference sound waves equal to the external environment noise according to the reverse waveform signal of the external environment noise.
Preferably, the wind turbine noise suppression method further includes, after the step S7, performing a step S8: collecting sound waveform information of the corrected noise after the external environment noise is compensated and eliminated in the step S7 by using a corrected noise collecting device arranged in the peripheral noise pollution influence area range of the wind turbine generator, transmitting the sound waveform information of the corrected noise back to the controller, and controlling the sound generating device to correct the emitted reverse interference sound wave by the controller according to the sound waveform information of the corrected noise.
The noise suppression system and method for the wind turbine generator set actively reduce noise generated by the operation of the wind turbine generator set by adopting corresponding control measures for the wind turbine generator set at different places under operation conditions, and can ensure that the noise pollution influence during the operation of the wind turbine generator set is minimized on the premise of not influencing the power generation efficiency and the economic benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIGS. 1a and 1b are schematic structural diagrams of a noise suppression system of a wind turbine generator according to the present invention;
FIG. 2 is a schematic flow chart of a wind turbine noise suppression method according to the present invention;
fig. 3 is a schematic view of a work flow of a sound generating device in the wind turbine noise suppression method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The wind turbine noise suppression system is applied to a wind turbine, and comprises an impeller system 1, a yaw system 2, a control system 3, a wind condition acquisition device 4 and a tower 5, as shown in fig. 1a and 1 b.
The positioning device 6 may be integrated into the control system 3 or may be separately configured at any other location in the wind turbine and communicate data with the control system 3.
The ambient noise collection device 7 may be arranged outside the wind turbine nacelle, for example, a plurality of ambient noise collection devices 7 may be arranged in orthogonal 4 directions outside the nacelle. The number of the environmental noise collecting devices 7 is not limited, and the environmental noise collecting devices can be freely increased or decreased according to actual conditions.
The sound generating device 8 can be arranged below the tail of the wind turbine generator cabin cover and at the center of the impeller system 1, and the sound generating device 8 can be arranged at any position where sound can cover the peripheral noise pollution influence area of the wind turbine generator in a tower mode and the like. The number of the sounding devices 8 is not limited, and can be freely increased or decreased according to actual conditions. The sound emitting angle of the sound emitting device 8 is fixed or can be adjustable in a holder or the like.
The controller may be the control system 3 itself of the wind turbine, or the controller may also take the form of a separate controller and communicate data with the control system 3. The controller is internally provided with a database, and the database is prestored with geographical information of areas, which are around the wind turbine and are to be prevented from being polluted by noise.
Preferably, in order to obtain the noise suppression effect of the wind turbine generator in real time and provide feedback control for the sound generating device 8, the noise suppression system of the wind turbine generator can be further provided with correction noise collecting devices, the correction noise collecting devices are arranged in the range of the peripheral noise pollution influence area of the wind turbine generator, and the number of the correction noise collecting devices can be freely increased or decreased according to actual conditions.
As shown in fig. 2, the wind turbine noise suppression method implemented by using the wind turbine noise suppression system of the present invention includes the following steps:
s1, the positioning device 6 determines the geographic coordinates of the wind turbine generator, wherein the geographic coordinates comprise the longitude, the latitude and the altitude of the wind turbine generator;
s2, the controller acquires the diameter of the impeller of the wind turbine generator and the height of the tower;
s3, the controller collects wind speed and wind direction information through the wind condition collection device 4;
s4, calculating and determining the peripheral noise pollution influence area of the wind turbine by the controller according to the geographic coordinates of the wind turbine determined in the step S1, the diameter and the height of the tower of the wind turbine obtained in the step S2 and the wind speed and wind direction information obtained in the step S3;
s5, the controller calls geographical information of a region where noise pollution is to be avoided around the wind turbine generator and prestored in a database of the controller;
s6, the controller calculates the intersection of the noise pollution influence area determined in the step S4 and the noise pollution avoidance area called in the step S5, and sets the intersection as the working area of the sound generating device 8;
s7, the sound generating device 8 works as a secondary sound source, and sends a reverse sound wave to the working area to compensate and eliminate the external environment noise.
Preferably, in step S7, the sound generating device 8 operates according to whether the intersection between the noise pollution affected zone and the zone where the noise pollution should be avoided is empty, the operating state of the wind turbine generator, and the intensity of the environmental noise, so as shown in fig. 3, step S7 includes the following sub-steps:
s71, the controller judges whether the intersection calculated in the step S6 is empty, if the intersection is empty, namely the noise pollution area is to be avoided and is not in the noise pollution influence area, the step S72 is skipped; if the intersection is not empty, i.e. the noise pollution area should be avoided to be at least partially within the noise pollution affected area, go to step S73;
s72, the sounding device 8 is in a standby state of not working;
s73, the controller detects whether the wind turbine is in an operation state, and if the wind turbine is in a non-operation state, the step goes to S72; if the wind turbine generator is in the running state, jumping to step S74;
s74, detecting the current external environment noise intensity by the environment noise acquisition device 7;
s75, the controller judges whether the current external environment noise intensity is larger than a preset threshold value, if the current external environment illumination intensity is not larger than the preset threshold value, the step S72 is skipped; if the current external environment noise intensity is larger than the preset threshold value, jumping to step S76;
and S76, the sound generating device 8 is in a working state and sends reverse sound waves for counteracting the environmental noise to the working area of the sound generating device to compensate and eliminate the external environmental noise.
Preferably, in step S76, the step of emitting the backward sound wave counteracting the environmental noise by the sound emitting device 8 to the working area thereof includes:
step S761: the environmental noise acquisition device 7 detects the sound waveform of the external environmental noise, wherein the sound waveform comprises frequency, amplitude and phase;
step S762: the controller filters and processes the sound waveform of the external environment noise to generate a reverse waveform signal of the external environment noise and sends the reverse waveform signal to the sound generating device 8;
step S763: the sound generating device 8 generates and generates a reverse interference sound wave equal to the external environment noise according to the reverse waveform signal of the external environment noise, wherein the reverse interference sound wave equal to the external environment noise means that the frequency and the phase of the reverse interference sound wave are equal to those of the external environment noise sound wave, and the amplitude of the reverse interference sound wave is opposite to that of the external environment noise sound wave, so that the amplitude of the reverse sound wave after the reverse sound wave is superimposed with the external environment noise is 0, and the external environment noise is eliminated.
Preferably, in step S76, the sound emission angle of the sound generator 8 is fixed, or may be dynamically adjusted according to the real-time noise pollution impact area around the wind turbine determined in step S4.
Preferably, the wind turbine noise suppression method of the present invention further includes performing step S8 after step S7: collecting sound waveform information of the corrected noise after the external environment noise is compensated and eliminated in the step S7 by using a corrected noise collecting device arranged in the peripheral noise pollution influence area range of the wind turbine generator, transmitting the sound waveform information of the corrected noise back to the controller, and controlling the sound generating device 8 to correct the emitted reverse interference sound wave by the controller according to the sound waveform information of the corrected noise.
By utilizing the noise suppression system and method of the wind turbine generator, the noise generated by the operation of the wind turbine generator is actively reduced by adopting corresponding control measures on the wind turbine generator in different places and under the operation working condition, and the noise pollution influence during the operation of the wind turbine generator is ensured to be minimized on the premise of not influencing the power generation efficiency and the economic benefit.
It is to be noted that, in this document, the term "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion, so that an article or an apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Meanwhile, the term "connected" and the like as used herein should be broadly interpreted as referring to a fixed connection, a detachable connection, a direct connection, or an indirect connection through intermediate components. In addition, "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like are referred to herein as being placed in the state shown in the drawings.
It should be further noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or alterations do not depart from the spirit of the invention.
Claims (10)
1. The utility model provides a wind turbine noise suppression system, wind turbine noise suppression system uses in the wind turbine, the wind turbine includes impeller system, driftage system, control system, wind condition collection system, a tower section of thick bamboo, a serial communication port, wind turbine noise suppression system is including setting up positioner, ambient noise collection system, sound generating mechanism and the controller in the wind turbine, the controller embeds there is the database, the peripheral geographical information who should avoid noise pollution region of wind turbine has in advance in the database.
2. The wind turbine noise suppression system of claim 1, wherein the positioning device is integrated into the control system or the positioning device is separately configured in the wind turbine and communicates data with the control system.
3. The wind turbine generator noise suppression system of claim 1, wherein the ambient noise collection device is disposed outside the wind turbine nacelle in 4 orthogonal directions.
4. The wind turbine generator noise suppression system of claim 1, wherein the sound generator is disposed below a rear portion of a nacelle cover of the wind turbine generator and in a central location of the impeller system.
5. The wind turbine noise suppression system of claim 1, wherein the controller is the control system of the wind turbine itself, or the controller is a stand-alone controller and communicates data with the control system.
6. The wind turbine generator noise suppression system of claim 1, further comprising corrective noise collection devices disposed within the area of influence of ambient noise pollution of the wind turbine generator.
7. A wind turbine noise suppression method implemented by using the wind turbine noise suppression system according to any one of claims 1 to 6, characterized by comprising the steps of:
s1, determining the geographic coordinates of the wind turbine generator by the positioning device, wherein the geographic coordinates comprise the longitude, the latitude and the altitude of the wind turbine generator;
s2, the controller acquires the diameter of the impeller of the wind turbine generator and the height of the tower;
s3, acquiring wind speed and wind direction information by the controller through a wind condition acquisition device;
s4, calculating and determining the peripheral noise pollution influence area of the wind turbine by the controller according to the geographic coordinates of the wind turbine determined in the step S1, the diameter and the height of the tower of the wind turbine obtained in the step S2 and the wind speed and wind direction information obtained in the step S3;
s5, the controller calls geographical information of a region where noise pollution is to be avoided around the wind turbine generator and prestored in a database of the controller;
s6, the controller calculates the intersection of the noise pollution influence area determined in the step S4 and the noise pollution avoidance area called in the step S5, and sets the intersection as the working area of the sound generating device;
and S7, the sound generating device works to send reverse sound waves for counteracting the environmental noise to the corresponding working area so as to compensate and eliminate the external environmental noise.
8. The wind turbine generator noise suppression method according to claim 7, wherein the step S7 includes the following sub-steps:
s71, the controller judges whether the intersection set calculated in the step S6 is empty, if the intersection set is empty, the step S72 is skipped; if the intersection is not empty, go to step S73;
s72, the sounding device is in a standby state of not working;
s73, the controller detects whether the wind turbine is in an operation state, and if the wind turbine is in a non-operation state, the step goes to S72; if the wind turbine generator is in the running state, jumping to step S74;
s74, detecting the current external environment noise intensity by an environment noise acquisition device;
s75, the controller judges whether the current external environment noise intensity is larger than a preset threshold value, if the current external environment illumination intensity is not larger than the preset threshold value, the step S72 is skipped; if the current external environment noise intensity is larger than the preset threshold value, jumping to step S76;
and S76, the sound generating device is in a working state, and sends reverse sound waves for counteracting the environmental noise to the corresponding working area so as to compensate and eliminate the external environmental noise.
9. The wind turbine noise suppression method according to claim 8, wherein the step S76 includes:
step S761: the method comprises the steps that an environmental noise acquisition device detects sound waveforms of external environmental noise, wherein the sound waveforms comprise frequency, amplitude and phase;
step S762: the controller filters and processes the sound waveform of the external environment noise to generate a reverse waveform signal of the external environment noise and sends the reverse waveform signal to the sound generating device;
step S763: the sound generating device generates and emits reverse interference sound waves equal to the external environment noise according to the reverse waveform signal of the external environment noise.
10. The wind turbine noise suppression method according to claim 9, further comprising, after step S7, performing step S8: collecting sound waveform information of the corrected noise after the external environment noise is compensated and eliminated in the step S7 by using a corrected noise collecting device arranged in the peripheral noise pollution influence area range of the wind turbine generator, transmitting the sound waveform information of the corrected noise back to the controller, and controlling the sound generating device to correct the emitted reverse interference sound wave by the controller according to the sound waveform information of the corrected noise.
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| CN108386316A (en) * | 2018-02-27 | 2018-08-10 | 新疆金风科技股份有限公司 | Wind power generating set noise reduction system and method, control device and its storage medium |
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| CN108386316A (en) * | 2018-02-27 | 2018-08-10 | 新疆金风科技股份有限公司 | Wind power generating set noise reduction system and method, control device and its storage medium |
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