基于逆系统方法的变速变桨距风机的桨距角控制  

Inverse-system method for pitch control of a variable-speed variable-pitch wind generator

作　　者：耿华[1] 杨耕[1] 

机构地区：[1]清华大学自动化系,北京100084

出　　处：《清华大学学报（自然科学版）》2008年第7期1221-1224,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(60674096)

摘　　要：为优化变速变桨距风电系统的高风速区风电系统的风能捕获,基于奇异摄动理论和逆系统方法提出一种非线性的桨距角控制器。该方法将风电系统模型简化为一阶动态系统,并设计其逆系统与之级联。由于级联系统呈"伪线性",可由线性系统理论的相关方法设计其动态性能。理论分析和仿真实验证明了系统的稳定性。与传统的比例积分(PI)控制器相比,该非线性控制器可以减小风速波动所引起的风机机械转矩、转速和系统输出功率的脉动;与其他非线性控制器相比,该控制器更易实现和移植。Typical variable-speed variable-pitch wind generator systems （VSVP-WGSs） are composed of subsystems with different time scales. A nonlinear controller was developed using the perturbation theory and inverse-system method to optimize the wind energy conversion in a high wind speed region, with the VSVP-WGS model transferred to a ＂pseudo-linear＂ system which can be simply stabilized using the linear control theory. Analyses and simulations verified the stability of the controller. The results show that the nonlinear inverse-system controller （ISC） further reduces the fluctuations of the turbine mechanical torque,, rotational speed and output power caused by the wind speed variations compared with the conventional proportional-integral controller. ISC is more simple and more easily extended to other kinds of WGSs compared with other nonlinear controllers.

关 键 词：风力发电系统 非仿射型非线性系统 桨距角控制 逆系统控制 双时间尺度法 

分 类 号：TM641[电气工程—电力系统及自动化] TM315