REAL-TIME FATIGUE DAMAGE PREDICTION METHOD FOR WIND TURBINE STRUCTURES

Zhao Yan; Sun Shuocheng; Wang Xinwu; Bu Xin; Li Xiaolu; Chen Feng

doi:10.19912/j.0254-0096.tynxb.2024-1010

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (10) : 655-662. DOI: 10.19912/j.0254-0096.tynxb.2024-1010

REAL-TIME FATIGUE DAMAGE PREDICTION METHOD FOR WIND TURBINE STRUCTURES

Zhao Yan^1,2, Sun Shuocheng¹, Wang Xinwu^2,3, Bu Xin³, Li Xiaolu³, Chen Feng⁴

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Abstract

In order to understand the actual fatigue damage and remaining service life of wind turbines, it is crucial to conduct fatigue assessment of wind turbines based on vibration monitoring. Through long-term monitoring of tower bottom strain of a 1.5MW wind turbine, a new method for real-time prediction of fatigue damage was proposed based on the traditional four-point rainflow cycle counting algorithm. Traditional methods only considered stress cycles within subsets and ignored transition cycles between subsets. The new method proposed in this article predicted the current fatigue damage by concatenating residue series that could not form complete cycles in the past stresses with newly measured stresses. The new residue series were then stored and combined with subsequent measured stresses to evaluate the fatigue damage of wind turbines in real time. The fatigue damage obtained by using this method was identical to the results obtained by using known data as a continuous sequence, proving the accuracy of this method. At the same time, in this method only the residue series of historical data need to stored, which occupy less memory, this article also proveds that the accuracy of this method is not affected by the calculation window length. This provides a solution for online real-time prediction of fatigue damage in wind turbine structures.

Key words

wind turbines / monitoring / fatigue damage / fatigue life prediction / residue concatenation methodology

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Zhao Yan, Sun Shuocheng, Wang Xinwu, Bu Xin, Li Xiaolu, Chen Feng. REAL-TIME FATIGUE DAMAGE PREDICTION METHOD FOR WIND TURBINE STRUCTURES[J]. Acta Energiae Solaris Sinica. 2025, 46(10): 655-662 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1010

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