基于全局鲁棒滑模控制的变速恒频双馈风力发电机的研究

Variable-Speed Constant-Frequency Doubly-Fed Wind Power Generator Based on Robust Global Sliding-Mode Control

随着风力发电技术的发展,对变速恒频双馈风力发电机的控制方法方面的研究显得越发的重要.根据变速恒频双馈发电机对控制系统要求响应速度快、鲁棒性强的特点,将矢量转换方法与全局滑模控制方法结合,提出了一种全局鲁棒滑模变结构控制方案.针对双馈异步电机在内部参数变化和外部风机负载转矩扰动共同带来的扰动进行设计,并对比了传统PI控制.仿真证明,该控制方法可以提高双馈电机的动态性能,进一步增强了电机的抗干扰性.

With the development of wind power generation technology, research on the study of variable-speed constant-frequency doubly-fed wind power generator control method is increasingly important. Based on the features of the VSCF doubly-fed generator request fast response for control system and the strong robustness, combining the methods of vector conversion and global sliding-mode control, presents a scheme of global robust sliding-mode vari- able structure control. Design For the disturbance caused by the double-fed asynchronous motor in the internal pa- rameter variations and external fan the load torque disturbance, and the comparison of the traditional PI control. Simulation shows ： this control method can improve the dynamic performance of doubly-fed motors, further enhance the motor interference.