介绍一种可应用于小型风力机的新型变桨调节装置,为验证其高风速运行的可行性,同时分析桨距角对小型风力机输出功率的影响特性,保持恒功率输出时的桨距角控制规律及变桨机构所受实际载荷大小,制造样机模型进行风洞实验。实验结果表明：在5~20 m/s的测试风速范围内新型变桨风力机运行安全可靠;6°桨距角时风力机输出性能最佳,无论桨距角增大或减小,输出性能均有所降低;风速一定时,风力机输出功率随桨距角的增大呈近似线性减小的趋势,且风速越大桨距角变化对输出功率的影响越显著;得出风力机输出功率控制在约1400 W时的桨距角、风速关系式;保持恒功率输出时,通过桨距角调节可使变桨距风力机推杆载荷较定桨距风力机明显降低。
Abstract
This paper introduces a new type of pitch adjustment device which can be applied to small wind turbine. In order to verify the feasibility of its high wind speed operation, the influence characteristics of pitch angle on the output power of small wind turbine are analyzed, the control law of pitch angle when maintaining constant power output and the actual load on the pitch mechanism are researched. A prototype model was tested in wind tunnel. The test results show that the operation of the new type pitch wind turbine is safe and reliable in the test wind speed range of 5~20 m/s. When the pitch angle is 6°, the output performance of the wind turbine is the best. No matter the pitch angle continues to increase or decrease, the output performance decreases. When the wind speed is constant, the output power of the wind turbine decreases approximately linearly with the increase of the pitch angle, and the higher the wind speed, the more significant the influence of the pitch angle change on the output power. The relationship between pitch angle and wind speed when the output power of wind turbine is controlled near 1400 W is obtained. When the constant power output is maintained, the load of pitch rod is significantly lower than that of constant pitch wind turbine.
关键词
风力机 /
功率控制 /
载荷测试 /
桨距角 /
风洞实验
Key words
wind turbines /
power control /
load testing /
pitch angle /
wind tunnel experiment
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基金
鄂尔多斯科技合作重大专项（2021EEDSCXQDFZ009）
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