中小型风力机功率曲线的分析与优化

以提高风力机发电效率为目标,对风机功率曲线的工作点及可优化区间进行分析,为功率曲线优化提供基础。根据风力机的监测数据,采用最小二乘法与查表法估算出最优功率曲线,将其与叶尖速比法结合,调整风力机内部参数,以进行功率曲线优化。该方法利用实际的中小型风力机机进行试验,克服了叶尖速比法需要建立准确风力机模型及风速测量等在实际生活中应用的局限性;并对单台风力机建立模型,理论输出功率精度高,具有很高的自适应性。通过对多台风力机功率曲线的对比分析,发现该方法对优化风力机的功率曲线具有一定效果,可为中小型风力机的优化提供参考。

Analysis and Optimization of Power Curve of Medium and Small Wind Power

In order to improve the efficiency of wind turbine power generation, the working point and the optimal interval of fan power curve are analyzed, which provide the basis for power curve optimization. According to the monitoring data of the wind turbine, fitting the tip speed ratio curve. And then using the least squares method and look-up table to estimate the optimal power curve, combined with the tip speed ratio method ,to adjust the internal parameters of the wind turbine and optimize the power curve.The method uses the actual small and medium sized wind turbine to test,and it overcomes the limitations of the tip speed ratio method in real life,such as needing to establish accurate wind turbine model or wind speed measurement.And a single wind turbine to establish a model, the theoretical output power of high precision, with high self-adaptability. Through the comparison and analysis of the power curves of multiple wind turbines, it is found that this method has certain effect on optimizing the power curve of the wind turbine and can provide reference for t small and medium sized wind turbines.