ADAPTIVE SUPER TWISTING SLIDING MODE PITCH CONTROL OF FLOATING OFFSHORE WIND TURBINE

Han Yaozhen; Yang Wenxiang; Ma Ronglin; Hou Mingdong; Yang Renming; Wang Changshun

doi:10.19912/j.0254-0096.tynxb.2023-0061

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (5) : 62-69. DOI: 10.19912/j.0254-0096.tynxb.2023-0061

ADAPTIVE SUPER TWISTING SLIDING MODE PITCH CONTROL OF FLOATING OFFSHORE WIND TURBINE

Han Yaozhen¹, Yang Wenxiang¹, Ma Ronglin², Hou Mingdong¹, Yang Renming¹, Wang Changshun¹

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Abstract

Considering system nonlinearity, model parameter perturbation and wind wave disturbance, a robust pitch control scheme based on adaptive super twisting second order sliding mode and disturbance observation compensation is proposed for the objectives of output power stabilization, floating platform motion and fatigue load suppression of floating offshore wind turbine system above rated wind speed. Firstly, the affine nonlinear uncertain system modeling of floating offshore wind turbine is implemented. Secondly, a sliding mode function considering the rated speed of the wind turbine and the pitch of the platform is constructed, and a super twisting second order sliding mode control law with adaptive control gain is designed. Thirdly, disturbance observer is used to compensate the model parameter perturbation and wind wave disturbance uncertainty. Finally, the effectiveness and superiority of the proposed scheme is verified based on FAST and Matlab/Simulink under different wind and wave environment conditions. The time domain and frequency domain simulation results show that the proposed scheme has better control effect on stabilizing the output power, suppressing the floating platform motion and reducing the tower base load, compared with the traditional proportional integral control scheme.

Key words

offshore wind turbines / sliding mode control / power control / disturbance observer / platform motion suppression

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Han Yaozhen, Yang Wenxiang, Ma Ronglin, Hou Mingdong, Yang Renming, Wang Changshun. ADAPTIVE SUPER TWISTING SLIDING MODE PITCH CONTROL OF FLOATING OFFSHORE WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2024, 45(5): 62-69 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0061

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