基于希尔伯特-黄变换的2.2MW风力发电机噪声特征研究

doi:10.3969/j.issn.1000-1158.2024.12.13

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Abstract To measure the aerodynamic noise of a 2.2 MW horizontal-axis wind turbine,six measurement points were set up in a large wind farm.The points were placed in the upwind,downwind,and at a 60° angle around the turbine.The trends of total sound pressure level(TSPL) of measurement points were obtained by 1/3 octave analysis under the wind speeds ranging from 6.55～15.00m/s.On the basis,the empirical modal decomposition(EMD) and Hilbert-Huang transform(HHT),combined with the marginal spectra,were applied to obtain the key time-frequency characteristics of wind turbine noise.The results showed that the total sound pressure levels at the 60° measurement points are similar to those of the standard measurement points in the same direction.However,the noise level at measurement point 4#,located upwind of the wind turbine,is relatively lower.The variance contribution ratio and correlation coefficient derived from the EMD reveal that the primary energy of the noise is concentrated in the frequency band of 770~1120Hz.The principal frequency of the fitted marginal spectrum is in good agreement with the cubic relationship of the corresponding wind speed.

Key words： acoustic metrology wind turbines noise testing signal processing HHT

Received: 11 December 2023 Published: 18 December 2024

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	HE Jie
	ZHANG Shiwei
	SUN Bingchuan
	XUE Minghua
	SU Mingxu

Cite this article:

HE Jie,ZHANG Shiwei,SUN Bingchuan, et al. Noise Characteristic Study of 2.2 MW Large Wind Turbine Based on Hilbert-Huang Transform[J]. Acta Metrologica Sinica, 2024, 45(12): 1841-1848.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2024.12.13 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2024/V45/I12/1841

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