垂直轴风力机变桨控制策略及气动性能影响研究

doi:10.19912/j.0254-0096.tynxb.2021-0234

摘要/Abstract

摘要： 以H型Darrieus垂直轴风力机为研究对象,基于不同尖速比下攻角随相位角变化规律,提出一种俯仰角控制策略,即攻角较大时俯仰变化幅值较大,而攻角较小时幅值较小。通过数值计算了解此控制方式对气动性能的影响规律,分析变桨后不同旋转角度下风力机涡量场的变化,并讨论气动载荷变化的原因。结果表明：所提俯仰角控制策略可显著增强风力机功率系数,且尖速比较低时提升效果越显著,在TSR为1.25时功率系数提升高达146%。

关键词: 垂直轴风力机, 变桨, 控制策略, 气动性能

Abstract: The attack angle of the vertical axis wind turbine changes periodically during the operation. The blades are often in a dynamic stall state at low tip speed ratios, which greatly reduces their aerodynamic performance. Adjusting the angle of attack of the blades to control flow separation can improve its operating performance effectively. This paper takes the H-type Darrieus vertical axis wind turbine as the research object. Based on the rule that the variation of the angle of attack with the phase angle at different tip speed ratios, a pitch angle control strategy is proposed. That is when the angle of attack is larger, the amplitude of the change is larger, and when it is smaller, the amplitude of change is smaller, and then the influence of its control method on aerodynamic performance is verified through numerical calculation, the variation of vortex field of wind turbine is analyzed under different rotation angles, and the reason of aerodynamic load variation is also discussed. The results show that this pitch angle control strategy can significantly improve the power coefficient, and the lifting effect is more significant when the tip speed ratio is lower, at a TSR of 1.25, the power coefficient increases by 146%.

Key words: vertical axis wind turbines, pitch, control strategy, aerodynamic performance

中图分类号:

TK83

张强, 缪维跑, 刘青松, 李春, 张万福. 垂直轴风力机变桨控制策略及气动性能影响研究[J]. 太阳能学报, 2022, 43(10): 296-303.

Zhang Qiang, Miao Weipao, Liu Qingsong, Li Chun, Zhang Wanfu. RESEARCH ON PITCH CONTROL STRATEGY AND AERODYNAMIC PERFORMANCE OF VERTICAL AXIS WIND TURBINE[J]. Acta Energiae Solaris Sinica, 2022, 43(10): 296-303.

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