考虑湍流频率因素的风力机最大功率点跟踪控制

发布时间：2018-11-05 17:48

【摘要】：湍流风速的频率会影响风力机最大功率点跟踪(maximum power point tracking,MPPT)的性能,却被目前的MPPT控制及其改进方法所忽略。因此,为进一步提高风能捕获效率,该文基于收缩跟踪区间的功率曲线调整方式,采用响应面近似模型构建最佳起始转速与3种风速特征指标(平均风速、湍流强度、湍流频率)的函数关系,进而提出能够更加全面响应湍流风况变化的改进功率信号反馈法。该方法对湍流风速的考虑更为完善,因而能进一步提高风能捕获效率以及风力机MPPT对湍流风况的适应性。最后,利用美国国家可再生能源实验室(national renewable energy laboratory,NREL)开发的FAST(fatigue,aerodynamics,structures,and turbulence)软件,针对NREL CART3风力机进行了仿真比较分析,验证了该方法的有效性与先进性。
[Abstract]:The frequency of turbulent wind speed will affect the performance of wind turbine maximum power point tracking (maximum power point tracking,MPPT), but it is ignored by the current MPPT control and its improved methods. Therefore, in order to further improve the efficiency of wind energy capture, the optimal initial speed and three wind speed characteristic indexes (mean wind speed, turbulence intensity) are constructed by using the response surface approximation model based on the power curve adjustment method in the contraction tracking region. Then, an improved power signal feedback method is proposed, which can more fully respond to the turbulence wind. This method is more perfect to consider the turbulent wind speed, so it can further improve the wind energy capture efficiency and the adaptability of the wind turbine MPPT to the turbulent wind conditions. Finally, the FAST (fatigue,aerodynamics,structures,and turbulence) software developed by the National Renewable Energy Laboratory (national renewable energy laboratory,NREL) is used to simulate and analyze the NREL CART3 wind turbine, which verifies the effectiveness and the advanced nature of the method.
【作者单位】：南京理工大学自动化学院;
【基金】：国家自然科学基金项目(61203129;61174038;51507080) 中国博士后科学基金项目(2013M541674) 中央高校基本科研业务费专项资金(30915011104;30920140112005)~~
【分类号】：TM315

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