A Four-level Hybrid-Clamped Converter With Natural Capacitor Voltage Balancing Ability
A Four-level Hybrid-Clamped Converter With Natural Capacitor Voltage Balancing Ability
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DOI：
10.1109/tpel.2013.2262834
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发表时间：
2014-03
影响因子：
6.7
通讯作者：
Kui Wang;Zedong Zheng;Lie Xu;Yongdong Li
中科院分区：
文献类型：
--
作者：
Kui Wang;Zedong Zheng;Lie Xu;Yongdong Li
本文提出了一种新颖的四电平混合钳位转换器拓扑，该拓扑由八个开关和每相一个飞跨电容器组成。介绍了该变换器的工作原理，并采用相移脉宽调制来控制该变换器。详细分析了通过快速电容器和直流链路中性点的平均电流。根据分析，可以得出结论，在理想稳态条件下，飞跨电容器和直流母线电容器两端的电压可以自然平衡。建立了一个低功率三相原型并提供了实验结果来验证所提出的拓扑和调制方法。
This paper presents a novel four-level hybrid-clamped converter topology which is composed of eight switches and one flying capacitor per phase. The operating principle is introduced and phase-shifted pulse width modulation is used to control this converter. A detailed analysis of the average currents through the flying capacitor and neutral points of the dc-link is presented. Based on the analysis, it can be concluded that the voltages across the flying capacitor and dc-link capacitors can be naturally balanced under ideal and steady-state condition. A low-power three-phase prototype is built up and experimental results are presented to validate the proposed topology and modulation method.