带指令滤波的直驱永磁风机自适应反推积分滑模控制

针对直驱式永磁同步风力发电系统最大功率跟踪问题，提出一种带指令滤波的自适应反推积分滑模控制器。构造了直驱式永磁风力发电系统的非线性模型。基于反推法设计控制器，并引入二阶滑模微分器充当指令滤波器，避免传统反推控制中计算膨胀和控制器饱和问题，并针对滤波误差设计补偿信号。考虑系统运行过程中参数的变化和系统未建模部分的影响，引入投影自适应算法提高系统的动态性能，并确保自适应估计值是有界的。同时为提高系统的鲁棒性，引入积分滑模控制，利用李雅普诺夫方法证明了系统的稳定性。仿真结果验证了所设计控制器的有效性。与传统PI控制、指令滤波反推控制器相比，所设计控制器具有更好的响应速度和鲁棒性。

Adaptive backstepping integral sliding mode control of a direct-drive permanent magnet wind generator with a command-filter

To solve the maximum power tracking problem of a direct-drive permanent magnet synchronous wind power generation system, an adaptive backstepping integral sliding mode control with command-filter is designed. The non-linear model of the system is established. The controller is designed based on the back-stepping method and the second-order sliding mode differentiator is introduced as a command-filter to avoid the problem of differential expansion and controller saturation in the traditional back-stepping control. The compensation signal is designed for the filtering error. Considering the changes of system parameters and the influence of unmodeled parts of the system during operation, a projection adaptive algorithm is introduced to improve the dynamic performance of the system and ensure that the adaptive estimation is bounded. In order to improve the robustness of the system, integral sliding mode control is introduced. Finally, the stability of the system is proved by the Lyapunov method. The simulation results verify the validity of the designed controller. Compared with traditional PI control and command-filtered backstepping controller, the designed controller has faster response speed and better robustness.This work is supported by Natural Science Foundation of Jiangsu Province (No. BK20181021) and Open Fund of Jiangsu Collaborative Innovation Center for Smart Distribution Network (No. XTCX201902).