双馈发电机的二阶滑模控制技术

Second-order Sliding Mode Control of Doubly Fed Induction Generator

针对双馈风力发电机运行不佳的问题,将自适应二阶滑模控制运用到双馈风力发电机的直接功率控制(DPC)中。设计了自适应二阶滑模控制器,给出了二阶滑模控制器的设计过程,推导了自适应律,证明了系统的稳定性,实现了控制器参数的在线实时调节。仿真和实验结果表明所设计的风电系统能对有功、无功功率进行有效控制,削弱传统滑模的抖振,具有良好的动、静态控制性能。

Adaptive second-order sliding mode control is applied to the direct power control (DPC) of doubly fed wind induction generator to solve the problem of poor operation of doubly-fed wind turbines. An adaptive second-order sliding mode controller is designed, the design process of the second-order sliding mode controller is given, the adaptive law is derived, the stability of the system is proved, and the online real-time adjustment of the controller parameters is real ized. Simulation and experimental results show that the designed wind power system can effectively control active and reactive power, weaken the chattering of traditional sliding mode, and has good dynamic and static control performance.