Control Strategy for Harmonic Elimination in Stand-Alone DFIG Applications With Nonlinear Loads
Control Strategy for Harmonic Elimination in Stand-Alone DFIG Applications With Nonlinear Loads
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DOI：
10.1109/tpel.2011.2123921
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发表时间：
2011-03
影响因子：
6.7
通讯作者：
V. Phan;Hong‐Hee Lee
中科院分区：
文献类型：
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作者：
V. Phan;Hong‐Hee Lee
针对单相双馈感应发电机（DFIG）为三相二极管整流器供电的情况，提出了一种有效消除定子输出电压共耦点处五次和七次谐波的控制策略。这种负载经常引起谐波畸变，从而有害地影响连接到DFIG的其他负载的性能。为了允许DFIG提供一个纯正弦定子输出电压，这些谐波必须被拒绝。提出了一种基于比例积分和谐振控制器的转子电流控制器的消除方法，该方法在基本参考系中实现。在这种情况下，只要在转子电流控制器中使用单个谐振补偿器调谐到同步频率的6倍，就可以消除正七次和负五次电压谐波。在转子侧变换器中开发了控制方案，用于DFIG的控制和运行。仿真和实验结果表明，2.2 kw DFIG馈送非线性负载，验证了所提控制方法的显著特点。
This paper proposes a new control strategy of effective fifth and seventh harmonic elimination in the stator output voltage at the point of common coupling for a stand-alone doubly fed induction generator (DFIG) feeding a three-phase diode rectifier. This load regularly causes such harmonic distortions, which harmfully affect the performance of other loads connected to the DFIG. In order to allow the DFIG to deliver a pure sinusoidal stator output voltage, these harmonics must be rejected. The proposed elimination method is investigated based on the rotor current controller employing a proportional integral and a resonant controller, which is implemented in the fundamental reference frame. In this frame, both positive seventh and negative fifth voltage harmonic can be eliminated by using only single resonant compensator tuned at six multiples of synchronous frequency in the rotor current controller. The control scheme is developed in the rotor-side converter for the control and operation of the DFIG. Simulations and experimental results with 2.2-kW DFIG feeding a nonlinear load are shown to verify prominent features of the proposed control method.