RESEARCH ON INSTANTANEOUS SPEED FLUCTUATION CHARACTERISTICS EXTRACTION METHOD OF WIND TURBINE BASED ON VIBRATION SIGNAL

Wan Shuting; Zhang Bolin; Zhao Xiaoyan; Zhang Xiong; Wang Yanjie; Wang Chengyu

doi:10.19912/j.0254-0096.tynxb.2023-1244

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (11) : 439-446. DOI: 10.19912/j.0254-0096.tynxb.2023-1244

RESEARCH ON INSTANTANEOUS SPEED FLUCTUATION CHARACTERISTICS EXTRACTION METHOD OF WIND TURBINE BASED ON VIBRATION SIGNAL

Wan Shuting¹, Zhang Bolin¹, Zhao Xiaoyan¹, Zhang Xiong¹, Wang Yanjie², Wang Chengyu¹

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Abstract

The analysis of existing wind turbines mainly considers the fluctuation of wind speed and the random fluctuation of speed caused by randomness. However, in actual operation, due to the periodic fluctuation of input torque caused by equivalent wind speed, the instantaneous speed of wind turbines contains both random and periodic fluctuation components. This article studies the instantaneous speed fluctuation characteristic curve extraction based on the vibration signal of the wind turbine transmission system. Firstly, the instantaneous speed fluctuation characteristics of the wind turbine impeller and its performance in the vibration signal are analyzed. Then, the synchroextracting transform （SET） algorithm is used for time-frequency analysis, and time-frequency ridges are extracted based on the local peak search algorithm. Finally, the ridge fusion algorithm is used to fuse the extracted instantaneous frequency ridges, achieving the extraction and optimization of wind turbine instantaneous speed. The periodic fluctuation characteristics of wind turbine instantaneous speed are further analyzed. Both simulation and experiments have shown that this method can effectively extract the instantaneous speed fluctuation characteristic curve of wind turbines from vibration signals without a tachometer, and analyse the characteristics of instantaneous rotational speed change and the causes of rotational speed change that this characteristic can be mapped.

Key words

wind turbines / wind speed / vibration analysis / ridge fusion / instantaneous speed fluctuation characteristics

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Wan Shuting, Zhang Bolin, Zhao Xiaoyan, Zhang Xiong, Wang Yanjie, Wang Chengyu. RESEARCH ON INSTANTANEOUS SPEED FLUCTUATION CHARACTERISTICS EXTRACTION METHOD OF WIND TURBINE BASED ON VIBRATION SIGNAL[J]. Acta Energiae Solaris Sinica. 2024, 45(11): 439-446 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1244

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