为提高永磁直驱风力发电系统的抗扰能力和控制精度，提出了一种扰动观测器与非奇异快速终端滑模控制相结合的最大功率跟踪控制策略。利用扰动观测器得到风力发电机的转矩变化，对控制器进行前馈补偿；采用非奇异快速终端滑模面提高控制器的动态性能，实现系统快速收敛，减少因扰动引起的抖振。仿真结果表明,所提策略在随机风速的情况下可以准确估计转矩变化，提高最大功率跟踪过程中的转速跟踪精度和风能利用率。

In order to improve anti-disturbance and control accuracy of permanent magnet direct drive wind generation system, a maximum power tracking control strategy based on non-singular fast terminal sliding mode control with disturbance observer is proposed. The torque of the wind turbine is estimated by the disturbance observer, and the feed-forward compensation of the controller is realized. The non-singular fast terminal sliding mode with improved reaching law is adopted to enhance the dynamic performance of the controller, which ensure the limited time convergence of the system and reduce the chattering infuences caused by disturbance. Simulation results show that the torque change can be accurately estimated under variable wind speed by the proposed strategy, and speed tracking accuracy and wind energy utilization can be improved during maximum power tracking.

陕西省自然科学基础研究计划项目（2019JM-443）