风力发电系统变桨距模糊PID控制

Design of Variable—pitch fuzzy PID controller Based on wind power system

由于风速的随机性及气动效应的影响,变桨距风力发电系统成为多变量强非线性不确定系统。常规PID控制方法难以取得满意的控制效果,本文在介绍和分析PD型和PI型模糊控制器的基础上,通过在PD型模糊控制器上并联一个积分环节,构成风力发电系统变桨距简化模糊PID控制器。仿真结果表明,该控制系统具有较好的动静态性能及风速扰动的鲁棒性。

The mathematical model of the wind power system is complex, strongly affected by the varying wind speed, and has the features of nonlinear, time changing and strongly coupling. So Conventional PID control is difficult to obtain satisfactory control effect. Based on introduction and analysis of PD and PI type fuzzy controller in this paper, a integral is paralleled with PD type fuzzy controller, then the simplified PID type fuzzy controller is introduced into the vary-pitch wind power system. The simulation results show that the new controller produces good dynamic performance, good robustness and adaptability.