全功率变流风力发电系统电压跌落响应特性研究

随着风电机组数量的增加，电网故障时风机的动态响应越来越重要。利用matlab/simulink，在建立采用永磁同步电机的直接驱动型变速恒频风电系统模型的基础上，分析了电网电压分别跌落30%-10 s、50%-0.5 s、85%-0.2 s时永磁直驱式风电系统的动态响应。并搭建了实验系统，进行了实验验证。结果表明，直驱式风电系统在3种典型跌落情况下，具有良好的低压度过能力。

Study On Voltage-Dip Response of Full Power Converter Wind Power System

With the increasing of wind turbines, the response of wind turbine is more and more important when the grid voltage dips. This paper establishes direct-drive vary speed constant frequency wind generation system using permanent-magnet synchronous machine, then analyzes the response of direct-drive wind generation system when the voltage dip is 30%-10 s, 50%-0.5 s, 85%-0.2 s individually. The results indicate that the direct-drive wind power system has good recovery capability at the three case of typical voltage-dip.