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Controlling wind turbine noise

A wind turbine and noise technology, applied in the field of tonal noise emission, can solve the problems that the tonal noise is difficult to predict, the noise emission model predicts the tonal noise and the identification of the tonal noise event is not effective, etc.

Active Publication Date: 2019-03-15
VESTAS WIND SYST AS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As explained above, pitch noise is unpredictable
Noise emission models such as those described in EP 2337952 are less effective for predicting tonal noise and identifying tonal noise events

Method used

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  • Controlling wind turbine noise
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  • Controlling wind turbine noise

Examples

Experimental program
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Embodiment Construction

[0037] figure 1 A wind power plant (1) is illustrated comprising a plurality of wind turbines (10a, 10b, 10c) and an adjacent area (2) where noise from the wind turbines can be heard. For the purposes of the present invention, the wind power plant (1) may have any number of wind turbines greater than or equal to 1, and the wind turbines may be wind turbine models known in the art.

[0038] In the vicinity of the adjacent area (2), or on or near the respective wind turbines, there is a microphone (20) configured to capture noise data, including noise data representing , 10c) generated noise in the data. The microphone captures noisy data over a wide frequency spectrum and over a long period of time at a suitable sampling rate, for example according to the process described in the third edition of IEC 61400-11.

[0039] Noise data captured by the microphone is transmitted from the microphone (20) for analysis. For example, the noise data may be transmitted to one or more comp...

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PUM

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Abstract

A method controlling a wind turbine to avoid tonal noise production is provided. The method comprises acquiring (510) noise data representing noise produced by a wind turbine and acquiring (520) datafrom a plurality of vibration sensors positioned at different locations about the wind turbine. The method further comprises identifying (530) a region of interest in the noise data, the region of interest being a candidate for containing tonal noise generated by the wind turbine, and identifying (540) a vibration sensor, the data for which correlates with the noise data in the region of interest.The method further comprises determining (550) a threshold vibration level for the identified vibration sensor, the threshold being based on the vibration level detected by the identified vibration sensor in the region of interest, and adjusting (560) one or more wind turbine operating parameters in response to the vibration level detected by the identified vibration sensor exceeding the threshold.

Description

technical field [0001] The present invention relates to the analysis and control of noise emissions from wind turbines, in particular tonal noise emissions. Background technique [0002] Noise emissions from wind turbines are a well-known problem and a lot of work has been done on it. The procedure for measuring the acoustic noise of wind turbines is described in the third edition of the international standard IEC 61400-11. [0003] Noise emissions from wind turbines include mechanical noise, also known as structure-based noise (SBN), and aerodynamic noise. Mechanical noise includes noise generated by components within the nacelle, such as wind turbine gearboxes. Aerodynamic noise originates from wind turbine blades and includes, for example, noise due to vortex shedding. Turbine blades may also radiate mechanical noise to the surrounding environment. [0004] The spectrum of noise generated by wind turbines includes broadband noise and noise of different frequencies. N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D17/00
CPCF05B2260/80F05B2260/96F05B2270/333F05B2270/334F05B2270/81F03D17/00F03D7/0296F05B2270/402F05B2270/807Y02E10/72F03D1/00F03D7/0224F03D7/0276F03D7/028
Inventor M·古普塔
Owner VESTAS WIND SYST AS
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