RESEARCH ON INFLUENCE OF YAW SPEED ON POWER AND BLADE STRESS OF WIND TURBINE

Zhang Jianwei; Wang Jianwen; Yan Sijia; Du Yunchao; Wang Yingzheng

doi:10.19912/j.0254-0096.tynxb.2021-0092

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (9) : 273-279. DOI: 10.19912/j.0254-0096.tynxb.2021-0092

RESEARCH ON INFLUENCE OF YAW SPEED ON POWER AND BLADE STRESS OF WIND TURBINE

Zhang Jianwei¹, Wang Jianwen^1,2, Yan Sijia¹, Du Yunchao¹, Wang Yingzheng¹

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Abstract

Through the experimental tests, the dynamic rotating platform is used to simulate the wind direction change and the yaw motion of the wind turbine. The effects of different yaw speed and yaw delay time on blade stress and power were studied. The results show that In the process of dynamic yaw motion, the stress value decreases gradually from the leading edge to the trailing edge of the blade and from the blade root to the tip. The stress concentration occurs at 0.67R and 0.75R in blade spanwise direction, 0.25c and 0.5c in chord direction of blade root. The yaw delay time can effectively suppress the blade stress fluctuation. Too slow yaw speed will lead to large fluctuation of power curve. The dimensionless coefficient is introduced, which is the ratio of power and blade stress. Through analysis, it is known that when only the stress and power of wind turbine blade are considered, the optimal yaw speed of wind turbine is 0.5°/s.

Key words

wind turbines / output power / stress analysis / blades / yaw motion / yaw speed / yaw delay

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Zhang Jianwei, Wang Jianwen, Yan Sijia, Du Yunchao, Wang Yingzheng. RESEARCH ON INFLUENCE OF YAW SPEED ON POWER AND BLADE STRESS OF WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2022, 43(9): 273-279 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0092

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