Active Clamped Multilevel Inverter With Switched Capacitors

被引：0

作者：

Wu X. ^{[1
]}

Zhao Y. ^{[2
]}

Liu J. ^{[1
]}

Liu F. ^{[1
]}

Wang J. ^{[1
]}

Zhao Z. ^{[3
,4
]}

Zhang X. ^{[3
,4
]}

机构：

[1] National Active Distribution Network Technology Research Center(Beijing Jiaotong University), Haidian District, Beijing

[2] Vertiv Tech Co., Ltd., Shenzhen, 518055, Guangdong Province

[3] State Key Laboratory of Air-conditioning Equipment and System Energy Conservation, Zhuhai, 519070, Guangdong Province

[4] Gree Electric Appliances, Inc. of Zhuhai, Zhuhai, 519070, Guangdong Province

来源：

Dianwang Jishu/Power System Technology | 2020年 / 44卷 / 04期

关键词：

Active clamped; Level expanded; Multilevel; Redundancy switching states; Switched capacitors;

D O I：

10.13335/j.1000-3673.pst.2019.0910

中图分类号：

学科分类号：

摘要：

Output levels of traditional multilevel inverter are difficult to expand. Considering that switched capacitors can generate double capacitor voltage, a novel seven-level inverter topology with switched capacitors is proposed in this paper. The topology can significantly increase the number of output levels. The redundancy states brought by the switched capacitor are beneficial to capacitor voltage equalization. Both the capacitor and the inverter are small in size, suitable for occasions of low voltage and high power density. The situations where the basic unit in the new topology is switched capacitor and flying capacitor respectively are analyzed. From the perspective of capacitance and cost, the principle of active neutral-point-clamped multilevel topology with switched capacitor is obtained. On this basis, the characteristics of the novel topology and common active neutral-point-clamped topology are compared from three aspects: the number of switching tubes, the number of capacitors and the number of redundant switching states. Finally, a nine-level new topology is taken as an example to analyze its working principle, modulation strategy and capacitor voltage control strategy. Simulation and experimental results verify feasibility of the proposed topology. © 2020, Power System Technology Press. All right reserved.

引用

页码：1453 / 1462

页数：9

共 19 条

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