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针对立轴风力机起动性能差和发电效率低的问题,提出一种自动变桨距立轴风力机方案。根据叶素理论,建立了变桨距叶轮的功率模型,并获得若干种不同尖速比下的最优桨距角控制规律。基于多流管模型,计算得到了不同变桨距规律时的叶轮风能利用系数和转矩,结果表明:该自动变桨距规律可显著提高立轴风力机的启动性能和风能利用系数,为后续变桨距立轴风力机的开发奠定了研究基础。
Aiming at the problem of poor starting performance and low power generation efficiency of vertical axis wind turbine, a scheme of automatic variable pitch vertical axis wind turbine is proposed. According to the elemental theory, the power model of variable pitch propeller was established and the optimal pitch angle control law was obtained under several different gear ratios. Based on the multi-manifold model, the wind turbine utilization coefficient and torque at different pitch laws were calculated. The results show that the law of automatic pitch control can significantly improve the start-up performance and wind energy utilization coefficient of the vertical axis wind turbine. Pitch vertical axis wind turbine laid the foundation for the development of research.