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基于直接虚功率控制的双馈风电系统并网方法

, PP. 99-105

Keywords: 直接虚功率控制,双馈感应电机,并网,风力发电

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Abstract:

对双馈风电系统的并网方法及并网过程进行研究,提出一种基于直接虚功率控制(directvirtualpowercontrol,DVPC)的并网方法,通过引入虚功率的概念,使传统的直接功率控制(directpowercontrol,DPC)亦适用于电机并网前的工况,控制定子电压同步并网。该并网方法不需要PI控制器和旋转坐标变换,并网前后控制器结构一致,过渡平滑,可实现较宽转速范围内的无电流冲击软并网,是一种双馈电机并网控制的有效方法。搭建了7.5kW的双馈系统实验平台,实验结果验证了该文所提出方法的正确性和有效性。

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