中文摘要：

本文选择可独立控制电机侧变换器和网侧变换器的PWM变换器作为永磁直驱风力发电系统的电能变换器,对电机侧、网侧变换器控制策略进行了阐述。电机侧采用多重化滑模观测器估算转子位置,有效抑制了抖振现象,使电机侧控制更加可靠。网侧控制采用电压外环电流内环的双闭环控制策略,可进行电能双向流动,对解耦控制进行了阐述,使系统可以更好的控制输出电能的品质。

英文摘要：

PWM converter is selected to be the power converter of direct-drive wind power generation system based on PMSG because the generator-side converter and grid-side converter can be controlled separately. The control strategy of generator-side and grid-side is designed. The multi-sliding mode rotor position observer is selected in generator-side, which can restrain chattering availably, as result the system can work more reliably. The voltage loop and inner current loop control strategy is used in grid-sJde, with which the power can flow bidirectional. The current relieve- coupling control also can improve the quality of the power.