独立变桨距控制策略研究

Strategies Study of Individual Variable Pitch Control

为解决独立变桨距控制多输入多输出信号之间的耦合问题,侧重于研究独立变桨距的多变量控制技术。建立带卡尔曼滤波器的前馈–反馈线性二次高斯函数(linear quadraticgaussian function,LQG)最优控制,并对统一变桨距控制、独立变桨距控制的标量比例积分(proportional-integral,PI)控制、独立变桨距控制的多变量LQG控制3种情况下的载荷进行对比。结果表明:LQG最优独立变桨距控制比统一变桨距控制和传统的PI独立变桨距控制具有更好的减载效果,更适合大型风力发电机组。

In order to solve the coupling among the multiinput and multi-output signals in the thesis, multivariable control technology of individual pitch was researched. Feed forward- feedback linear quadratic gaussian function （LQG） optimal control with coleman filter was established, and loads were compared among the collective pitch control, scalar PI control of the individual pitch control and multivariable LQG control of the individual pitch control. The result shows that the LQG optimal individual pitch control has better effect of reducing loads than the unified pitch control and conventional PI control of the individual pitch control, so it is more suitable for large-scale wind turbine.