【摘要】 对采用永磁同步电机的直接驱动型变速恒频风电系统进行建模,详细分析了系统在最佳叶尖速比捕捉最大风能、Chopper电路及桨距角控制增强低电压穿越能力的机理。利用M atlab/S imu link构建了采用全功率变流器的永磁直驱风力发电系统的仿真模型,对系统的最大风能捕捉及低电压穿越的动态响应进行了仿真验证。仿真结果表明,系统具有较高的效率和良好的低电压穿越能力。更多还原

【Abstract】 The model of direct-drive varible speed constant frequency wind generation system which uses permanent-magnet synchronous machine was established.The theory of working at optimal tip speed ratio to capture maximum wind energy and taking chopper circuit or pitch control to enhance the LVRT ability was analysed.The simulation model of direct drive PMSG wind turbine with full power converter was configured using Matlab/Simulink.The dynamic responses of MPPT and LVRT were simulated.The results indicate that the DDPMSG wind turbine has high efficiency and good LVRT ability.更多还原