永磁同步风力发电系统输出功率最佳控制

讨论了内嵌式永磁同步变速风力发电系统输出功率最大的控制方法.为了从风中获得的功率最大,对IPMSG采用最大功率点跟踪(MPTT)控制,根据发电机速度来控制发电机的转矩.同时控制IPMSG电流矢量以降低发电机损耗,使输出功率最大.电压极限时使用弱磁控制.在高速区域,变换器控制从正弦PWM控制转换到六脉冲方波运行以增加输出功率.试验结果证明了该控制方法的效果.

Optimal Control on Output Power of Permanent Magnet Synchronous Wind Generation System

This paper discusses the control of output maximization of interior permanent magnet synchronous generators for variable-speed wind generation system. In order to maximize output power derived from wind, IPMSG was controlled by a maximum power point tracking (MPTT) control,and the torque was suitably controlled according to the generator speed. The application of the maximum current vector minimized the loss of IPMSG and as a result the maximum generated power could be obtained. The flux-weakening control was employed considering voltage limit. Moreover,the converter control was switched from sinusoidal PWM control to square-wave operation in the high speed region to increase output power. The ex-perimental results verify the effectiveness of the proposed control method.