无速度传感器DFIG最大风能捕获Backstepping终端滑模控制

BACKSTEPPING TERMINAL SLIDING MODE CONTROL FOR DFIG MAXIMAL WIND ENERGY CAPTURE WITH SPEED SENSORLESS

以双馈风力发电机(DFIG)为研究对象,将两相同步旋转坐标系下的转子磁链定向数学模型看作两个子系统,分别设计Backstepping终端滑模控制器,实现最大风能捕获。设计一种基于非奇异终端滑模的DFIG转速和磁链观测器,采用高阶终端滑模面有效抑制抖振。仿真结果表明所设计的观测器和控制器均具有强鲁棒性,能实现无静差跟踪,系统响应快,稳态精度高。

Taking Doubly-fed Induction Generator （DFIG） as the research object, and considering the mathematical model of the rotor flux oriented under two-phase synchronous rotating coordinate system as two subsystems, the backstepping terminal sliding mode controllers are designed for them respectively to realize maximal wind energy capture. The observer of DFIG speed and flux is designed by nonsingular terminal sliding mode, moreover, and high- order terminal sliding mode surface is used to suppress chattering effectively. The simulation results showed that the designed observer and controller can realize no static error tracking and have the characteristics of quick response, good robustness and high stability accuracy.