小型风电系统最大功率跟踪的研究:通过对由新型无刷直流发电机构成的小型风力发电系统的分析,提出了一种最大限度获取风能的控制方法,该方法通过控制新型无刷直流发电机的电磁转矩- 转速特性间接地控制了风力机的机械转矩- 转速特性,使风力机在额定风速以下以最佳尖速比运行,自动跟踪其最大功率点. 详细阐述了运用此控制策略的功率调节器的设计方法,并实际制作了100 W的功率调节装置. 系统实验结果表明,新型控制方法在最大功率跟踪上取得了很好的效果,对提高小型风电系统年发电量有参考和应用价值.
关键词: 风力机;最大功率跟踪;最佳叶尖速比;直流变换器
Abstract : A control method to maximizing the system output , for a small wind energy conversion system composed of a new type of brushless DC generator , is put forward. With the aid of the method , the wind turbine torque vs. rotate speed characters can be indirectly controlled via adjusting the machine electromagnetic torque vs. rotate speed characters ,and the wind turbine operation with the optimum tip2speed ratio (TSR) and the maximum power point (MPP) is automatically tracked.A method for designing the power conditioner using this control strategy is presented in detail . A 100 W power conditioner prototype is designed and constructed. The experimental results confirm the effectiveness of this method during maximum power tracking.
Keywords : wind turbine ; maximum power tracking ; optimum tip2speed ratio ; DC2DC converter
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