STUDY ON FULLY COUPLED DYNAMIC RESPONSE OF LARGE WIND TURBINE DRIVETRAIN

Li Chengwu; Zhu Caichao; Song Chaosheng; Song Hailan; Ran Ao; Wang Wenxuan

doi:10.19912/j.0254-0096.tynxb.2023-1827

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (3) : 567-575. DOI: 10.19912/j.0254-0096.tynxb.2023-1827

STUDY ON FULLY COUPLED DYNAMIC RESPONSE OF LARGE WIND TURBINE DRIVETRAIN

Li Chengwu, Zhu Caichao, Song Chaosheng, Song Hailan, Ran Ao, Wang Wenxuan

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Abstract

In order to solve the problem that the electromagnetic torque excitation of generators is usually ignored in the analysis of dynamic characteristics of wind turbine drivetrain, the time-varying and nonlinear factors including blade flexibility, gear nonlinear stiffness and bearing elastic support, etc. are comprehensively considered and combined with the variable pitch control of wind turbine blades and the generator vector control, and a fully coupled mechanical-electrical-pneumatic-control dynamic model of the wind turbine drivetrain is established by using lumped parameter method and substructure method in the paper. The dynamic response characteristics of the drivetrain system are studied by utilizing time-domain simulation technology in the paper. The results show that the mechanical speed of the generator in the different ratio of bending damping to stiffness in the blade in-plane has significant oscillations under the condition of grid power voltage sag, but with the increase of the ratio of bending damping to stiffness in the blade in-plane, the mechanical speed fluctuation of the generator converges rapidly, and the appropriate increase of blade flexibility has a positive impact on the transient stability of the generator. Besides, electromagnetic torque excitation can aggravate vibration of mechanical components in the drivetrain, and increase gear fatigue damage.

Key words

wind turbines / drivetrain / fully coupled / dynamic response / electromagnetic torque / fatigue damage

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Li Chengwu, Zhu Caichao, Song Chaosheng, Song Hailan, Ran Ao, Wang Wenxuan. STUDY ON FULLY COUPLED DYNAMIC RESPONSE OF LARGE WIND TURBINE DRIVETRAIN[J]. Acta Energiae Solaris Sinica. 2025, 46(3): 567-575 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1827

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