风力发电机组恒功率无模型自适应变桨距控制

摘要

风力发电系统是一个非线性、强耦合的系统，其风速的扰动性极强。无模型控制基于系统特性值动态估计，优化内部参数可使系统克服时变和非线性，具有比PID更好的抗干扰能力，且更适用于非线性、强耦合系统。最后，对比了在阶跃和随机风速下无模型与PID控制器的控制效果，并进行仿真研究，结果表明无模型控制能更好地保持发电机功率恒定。%Wind turbine system boasts strong nonlinearity and coupling,and the disturbance from the wind is very strong.The model free adaptive control based on dynamically estimating the system’ s characteristic value was proposed to overcome the system’ s time-varying and nonlinearity by optimizing internal parameters.Its ca-pacity of resisting disturbance outperforms that of PID and is more suitable for the nonlinear and strong cou-pling system.Comparing the control effect of the model-free adaptive pitch control with that of the PID control and then simulating it indicate that the model-free control can keep a constant power for the turbine generator better.