垂直轴风力发电机的建模与变桨距研究

Modeling of Vertical Axis Wind Turbine and Research on the Variable Pitch

定桨距垂直轴风力发电机存在启动转矩小和输出效率低的缺点。为了改善垂直轴风电机组的输出特性,在静止和旋转状态下,对6叶片H型垂直轴风力发电机的风轮的受力情况进行了分析。首先建立了H型垂直轴风力机模型,然后对单个叶片变桨距与定桨距下的受力进行了分析,进而对6叶片风力机受力进行了分析。理论分析和仿真结果表明,叶片通过采取变桨距控制,不但有效地改善了H型垂直轴风力机的启动性能,并且减小了输出振动。因此,所提出的变桨距控制方法是可行的。

The fixed pitch vertical axis wind turbine （VAWT） features disadvantages of low startup torque and inefficient output, in order to improve the output characteristics of VAWT, the forced condition about six-blade H-type VAWT is analyzed under stationary and the rotating states. Firstly, the model of H-type VAWT is established, then the forced conditions of single blade under fixed pitch and variable pitch are analyzed, thus the forced condition of six-blade wind turbine is analyzed. The theoretical analysis and simulation result indicate that through variable pitch control, the startup performance of the H-type VAWT is effectively improved, in addition, the output vibration is decreased, thus the variable pitch control method proposed is feasible.