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首页> 外文期刊>Power Electronics, IET >Two methods for controlling three-time fundamental frequency neutral-point voltage oscillation in a hybrid VIENNA rectifier
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Two methods for controlling three-time fundamental frequency neutral-point voltage oscillation in a hybrid VIENNA rectifier

机译：混合VIENNA整流器中三种控制三倍基频中性点电压振荡的方法

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摘要

This study presents two methods of controlling neutral-point voltage oscillation in a hybrid VIENNA rectifier, which is composed of the parallel association of a three-phase single-switch Boost rectifier with a VIENNA-type rectifier. The neutral-point oscillation reason has been analysed with a mathematical model. Meanwhile, the two neutral-point control methods of a simplified method based on a zero-sequence component injection and a dual-carrier pulse-width modulation (PWM) method are proposed to control the voltage deviation of the split DC-link and three-time fundamental frequency neutral-point voltage fluctuation with a decrease from +/- 1.6 to +/- 1V, respectively. Moreover, the significant oscillation in the neutral-point voltage caused by unbalanced loads or asymmetric capacitor parameters can also be effectively suppressed by using the dual-carrier PWM method. Furthermore, the performance comparison between these two methods is provided. The experimental results show that the system after being introduced the proposed two methods still exhibits a low-order input current harmonic such as second, third, and fourth harmonics as well as the input current total harmonic distortion is lower than the standard 5%.
机译：这项研究提出了两种控制混合式VIENNA整流器中的中性点电压振荡的方法，该方法由三相单开关Boost整流器与VIENNA型整流器的并联关联组成。用数学模型分析了中性点振荡的原因。同时，提出了两种基于零序分量注入的简化方法和双载波脉宽调制（PWM）方法的中性点控制方法，以控制分离式直流母线的电压偏差和三端控制。时间基频中性点电压波动分别从+/- 1.6降低到+/- 1V。此外，通过使用双载波PWM方法，也可以有效地抑制由不平衡负载或不对称电容器参数引起的中性点电压的明显振荡。此外，提供了这两种方法之间的性能比较。实验结果表明，引入上述两种方法后，系统仍然表现出低阶输入电流谐波，如二次，三次和四次谐波，且输入电流的总谐波失真低于标准值的5％。

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