VIBRATION AND ITS SUPPRESSION OF LARGE WIND TURBINE UNDER YAW CONDITION BEFORE GRID CONNECTION

Wang Dingding; Zhao Zhenzhou; Liu Yan; Liu Yige

doi:10.19912/j.0254-0096.tynxb.2023-1571

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 649-657. DOI: 10.19912/j.0254-0096.tynxb.2023-1571

VIBRATION AND ITS SUPPRESSION OF LARGE WIND TURBINE UNDER YAW CONDITION BEFORE GRID CONNECTION

Wang Dingding, Zhao Zhenzhou, Liu Yan, Liu Yige

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Abstract

It is common for large wind turbines to produce large vibration under different wind directions before grid connection. This paper delves into the underlying mechanism of this phenomenon and proposes measures for its suppression. Based on computational fluid dynamics （CFD） and multi-body dynamics method, a fully coupled simulation model of vortex-induced vibration of the NREL 5 MW wind turbine under yaw wind direction is established. The flow field characteristics and structural response characteristics are analyzed mechanically. The results show that in the wind direction range of 0°-90°, the mutual interference and merging of the wake vortex between the blade and the tower are significant, which leads to the increase of the blade tip displacement and the blade root shear force, and the mean drag coefficient of the tower is quite different from that of the isolated tower. When the yaw wind direction is from 40° to 50°, the vortex-induced vibration of the wind turbine becomes particularly severe, and the maximum displacement of the tower top occurs at 50°, reaching approximately 0.97 m. By installing tuned mass damper （TMD） to suppress vortex-induced vibration, it is found that TMD greatly reduces the power spectral density of the characteristic frequency vibration of the wind turbine, and reduces the displacement of the tower top by about 30.8 %.

Key words

wind turbines / towers / vortex shedding / yaw / vortex-induced vibration / tuned mass damper（TMD）

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Wang Dingding, Zhao Zhenzhou, Liu Yan, Liu Yige. VIBRATION AND ITS SUPPRESSION OF LARGE WIND TURBINE UNDER YAW CONDITION BEFORE GRID CONNECTION[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 649-657 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1571

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