BLADE VIBRATION SENSING METHOD OF WIND TURBINE UNDER DYNAMIC YAW CONDITION BASED ON STRAIN MODE

Wang Ying; Liu Xiangyu; Zhai Jin'gang; Liu Zhen; Wang Jin

doi:10.19912/j.0254-0096.tynxb.2023-1407

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (1) : 125-133. DOI: 10.19912/j.0254-0096.tynxb.2023-1407

BLADE VIBRATION SENSING METHOD OF WIND TURBINE UNDER DYNAMIC YAW CONDITION BASED ON STRAIN MODE

Wang Ying, Liu Xiangyu, Zhai Jin'gang, Liu Zhen, Wang Jin

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Abstract

The acceleration sensor of wind turbine blades is usually placed near the wind turbine head, and it leads to the complex interference of wind turbine vibration signal. Based on the stress analysis of wind blade and strain mode theory, the original strain signals collected on the blade surface is decomposed into blade strain signals and blade vibration signals,and a blade vibration sensing method based on strain mode theory and variational mode decomposition is designed in this paper. By the comparison and analysis of blade strain and wind turbine head vibration through static modal test and blade vibration experiments under the condition of dynamic yaw, it is verified that the blade vibration signal can be positively identified both in frequency-domain and time-frequency domain with more clear spectrum and less interference than those of wind turbine head vibration signal. The sensing method proposed in this paper provides a new strategy for vibration measurement of wind turbine blades under dynamic yaw operation,and it can provide technical support for the safe and reliable operation of wind turbine blades.

Key words

wind turbine blades / dynamic yaw / vibration sensing / blade strain / varational modal decomposition / strain mode theory

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Wang Ying, Liu Xiangyu, Zhai Jin'gang, Liu Zhen, Wang Jin. BLADE VIBRATION SENSING METHOD OF WIND TURBINE UNDER DYNAMIC YAW CONDITION BASED ON STRAIN MODE[J]. Acta Energiae Solaris Sinica. 2025, 46(1): 125-133 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1407

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