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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 DFIG as the research object, the rotor flux orientation mathematical model under two-phase synchronous rotating coordinate system is taken as two subsystems, and the Backstepping terminal sliding mode controller is designed respectively to achieve the maximum wind energy capture. A DFIG speed and flux observer based on non-singular terminal sliding mode is designed. The high order sliding mode surface is used to suppress chattering effectively. The simulation results show that the designed observer and controller are both robust and robust, with no static tracking, fast system response and high steady-state accuracy.