基于模糊控制的风电机组独立变桨距控制

摘要

Large-scale wind turbine usually was regulated by variable pitch control to maintain the output power when wind speed above rating.As the mathematical model of wind power generation systems has the characteristics of highly nonlinear, multivariable, and strong coupling, with the variability of wind speed, A3-D fuzzy-PID controller in individual pitch control was proposed based on the advantages and shortcomings of PID controller, with fuzzy feed-forward control of wind speed. By the simulation analysis of 1 MW wind turbine,the results showed that the method can make output power stable , and decrease the flapping of blades.%在额定风速以上时,通常采用变桨距控制技术调节大型风电机组来稳定其输出功率.由于风力发电系统的数学模型具有高度非线性、多变量、强耦合的特点,风速又具有多变性,因此文章在分析传统的PID变桨距控制技术优缺点的基础上,提出了基于三维模糊自适应PID控制的独立变桨距控制技术,并且引入风速的模糊前馈控制技术.对1 MW风电机组进行仿真,结果表明,在额定风速以上时,该方法不仅能稳定风电机组的输出功率,而且可以减小桨叶的拍打振动.