反推滑模控制在电磁耦合调速型风电机组中的应用研究

摘要

针对电磁耦合调速型风电机组的风能跟踪中存在的跟踪效果较差的问题,提出了一种基于反推滑模控制的最大风能跟踪控制算法.依据风力机运行特性和电磁耦合器的工作原理建立了电磁耦合调速型调速型风电机组的数学模型,阐述了在该风电机组中最优转矩控制的具体应用方法,并获得参考转矩.最后依据反推滑模控制原理设计分别应用于最大风能跟踪区恒转速区的转矩滑模反推控制器和转速滑模反推控制器,验证了系统的稳定性.与转矩反推控制和传统最优转矩控制相比,该方法能够快速准确地跟踪风速的变化,以最佳叶尖速比运行,更好地实现最大风能跟踪的目标.%In term of operating characteristics of the wind turbine based on electromagnetic coupler,torque backstepping slide-model variable structure control and speed backstepping control were respectively applied in maximum power tracking area and constant speed area.A simulation model of a wind turbine based on an electromagnetic coupler in maximum power point tracking was built.The proposed control method had a simple structure and avoids measuring real-time wind speed.The simulation results,which were accomplished in step wind and random wind condition,indicate that this power tracking control scheme had good dynamic and static performance and better robust performance.Compared with torque backstepping and classical OTC,the proposed method could quickly and accurately track the variation of wind and effectively accomplish the goal of maximum power tracking.