电网电压不平衡条件下双馈电机转子侧功率控制

Power Control for Rotor-Side Converter of Double-fed Induction Generator Under Unbalanced Grid Voltage Conditions

本文提出了一种新型的补偿控制策略,能够提高电网不平衡下双馈电机的动态性能,有效减小有功功率和无功功率的波动。论文对转子侧变换器(Rotor-side converter—RSC)正序旋转坐标系下d轴电压迚行定向,因不需要双矢量控制,所以提出的控制方法简单、可靠。这种方法具体实施在RSC中,在电网工作在不同功率情况下,提高了RSC运行能力,同时减弱对电机的损伤。本文最后通过Matlab/Simulink仿真和4k W双馈异步电机实验平台对所提出的控制策略迚行验证。仿真和实验结果吻合,都能够达到所需要求。

This paper presents a novel compensation control strategy. This strategy can improve dynamic performance of the doubly fed induction generator under the unbalanced power grid and can reduce the active power and reactive power fluctuate. Rotor-side converter-RSC is implemented in positive d reference flame using stator voltage vector control. This kind of control strategy is no need for dual vector control, so it is simple and reliable. This method is used in the RSC. The focus is improved the ability of fault fide-through and decrease the damage of machine for different power demand of the grid. In order to test and verify this control strategy, model of matlab/simulink and 4kW DFIG experimental platform are built. The simulation and experimental results are to meet the required requirements.