风速前馈与变论域模糊结合的变桨距控制

针对传统PID变桨距控制难以在大惯性、强耦合的风力发电机组中取得较好的控制效果,提出了一种风速前馈的变论域模糊变桨距控制方法。根据功率误差及其变化率,通过模糊推理得到输入与输出论域的伸缩因子,避免了确定伸缩因子函数模型及其参数的困难；又采用风速前馈的方式实现桨距角的动态补偿,提高了系统的响应速度。仿真结果表明:当风速超过额定风速时,所提方法能使风力发电机组的转速更加稳定、输出功率更加平稳。

Variable Pitch Control with Wind Speed Feed-Forward and VariableRegion Fuzzy Controller

In order to solve the problem that the traditional PID could not achieve good control effects in the wind turbine with large inertia and strong coupling, a wind speed feed-forward and variable region fuzzy pitch controller was proposed. According to the power error and its rate of change, the contraction-expansion factor was obtained by fuzzy inference. And this method avoid the difficulty of determining the contraction-expansion factor model and its parameters. The dynamic compensation of pitch angle was realized by using the method of wind speed feed-forward, and the response speed of the system had also been improved. The simulation results showed that when the wind speed exceeds the rated wind speed, this method could made the speed and the output power more stable.