基于电磁耦合器调速的同步发电机控制研究

摘要

分析了基于电磁耦合器风电机组的结构组成及其工作原理.依据电磁耦合器的转矩传递和转速调节特性,在最大风能跟踪区和恒转速区分别采用最优转矩和转速闭环的控制方法建立电磁耦合器调速风电机组的风能跟踪控制的仿真模型.在以上2种运行区域及其过渡区的阶跃和随机2种风况下的仿真结果表明,该风能跟踪控制方法可以使风力机较快地达到并保持最大风能捕获的运行状态,稳定地完成运行区域的转变,有效地实现了最大风能跟踪的目的.%Operation characteristic of wind turbines and operating principle and structure of electromagnetic coupler was analyzed.According to the torque transmission and speed regulating characteristic of electromagnetic coupler,the optimal torque control method and speed closed-loop control were respectively applied in maximum power tracking area and constant speed area,a simulation model of a variable speed wind turbine was built based on an electromagnetic coupler in maximum power point tracking.The simulation results,which are accomplished in step wind and random wind condition of the above two regions and their transition region,indicate that the wind turbine regulated by this power tracking control scheme can reach steady-state faster,run stably at optimal tip speed ratio and effectively accomplish the goal of maximum power tracking.