一种新型独立变桨控制器设计

Design of a New Type of Independent Variable Pitch Controller

针对风剪、塔影和湍流等因素导致风轮不平衡载荷严重的问题,提出基于系统分解的独立变桨距控制策略,把非线性复杂变桨距系统分解为三个简单的线性子系统,将互不耦合的子系统进行叠加,得到最终需要的变桨角。建立了变浆子系统模型并进行仿真分析,结果表明该控制策略能很好地降低轮毂固定和旋转坐标系下Y方向和Z方向的不平衡载荷,使得发电机输出功率更加稳定,波动性明显减小。

Aiming at the problem that the wind shear, tower shadow and turbulence and other factors lead to the wind wheel load imbalance,this paper put forward the independent variable pitch control strategy based on system decomposition. The nonlinear complex variable pitch system was decomposed into three simple linear subsystems to overlay non-coupled subsystems to obtain the ultimate demanding variable pitch angle. The variable pitch subsystem was established and carried out simulation and analysis. The results show that the control strategy could well reduce the hub fixing and the imbalance load of Y direction and Z direction under the rotating coordinate system, which makes the output power of electric generator more stable and makes the volatility obvious reduced.