A Novel Flying-Capacitor Zeta Multi-Level Inverter

被引：0
作者：
Wang L. [1 ]
Han X. [1 ]
Li Z. [1 ]
Yang B. [1 ]
机构：
[1] Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, Yanshan University, Qinhuangdao
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2022年 / 37卷 / 01期
关键词：
Buck-boost; Close loop control; Multi-level inverter; Self-equalization; Zeta converter;
D O I：
10.19595/j.cnki.1000-6753.tces.201222
中图分类号：
学科分类号：
摘要：
This paper proposes a novel flying-capacitor zeta multi-level inverter, which is derived from the evolution of the Zeta converter. The proposed inverter has the advantages of Buck-Boost, capacitor self-sharing, less clamping devices, and topological ductility, which overcomes the limitations of traditional multi-level inverters in application. Firstly, this paper introduces the operating principle of the inverter, and adopts a unipolar carrier phase-shift modulation strategy to increase the equivalent switching frequency without increasing the carrier frequency and finally reduces the total harmonic distortion of the output voltage. In addition, this paper analyzes the voltage stress of the switching devices, the realization of the capacitor self-sharing, the buck-boost capability and the topology extension performance. The proposed inverter adopts a PR controller for closed-loop control, and its feasibility is verified by simulation. In addition, on the basis of theoretical analysis and simulation verification, an experimental prototype of the proposed inverter is built. The experimental results prove the correctness of the theoretical analysis and simulation results, and verify that the inverter has good dynamic and static performance. © 2022, Electrical Technology Press Co. Ltd. All right reserved.
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页码：254 / 265
页数：11
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