Single-phase nine-level inverter based on switched capacitor and its control strategy

被引：0
|
作者：
Wang Y. [1 ]
Zhou C. [1 ]
Wang M. [1 ]
Wang K. [1 ]
机构：
[1] School of Electrical Engineering, Zhengzhou University, Zhengzhou
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Capacitor voltage balancing; Modulation strategy; Multi-level inverter; Single power supply; Switched capacitor;
D O I：
10.16081/j.epae.202002009
中图分类号：
学科分类号：
摘要：
A single-phase nine-level inverter based on switched capacitor technology is proposed, which is composed of switched capacitor structure, auxiliary bidirectional switch and H-bridge unit. Through the series-parallel conversion of power supply and capacitor, the inverter can generate more output levels with fewer switching devices, which simplifies topology structure and reduces system cost. Moreover, the characteristic of single power input of the inverter broadens its application scope. The control of inverter is simple, and the capacitor voltage can be balanced without additional voltage equalizing circuit and complex control circuit. The working principle, modulation scheme, design principle of capacitance parameters and topological comparison analysis for the inverter are discussed in detail. Finally, the steady-state, dynamic and grid-connected performance of the proposed inverter are verified by experiments, which proves the correctness and feasibility of inverter structure and its modulation scheme. © 2020, Electric Power Automation Equipment Editorial Department. All right reserved.
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页码：201 / 207
页数：6
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