Single phase neutral-point-clamped switched-capacitor multilevel inverter and its control

被引：0

作者：

Wang Y. ^{[1
]}

Wang K. ^{[1
]}

Zhou C. ^{[1
]}

Yuan Y. ^{[1
]}

Li Z. ^{[1
]}

机构：

[1] School of Electrical Engineering, Zhengzhou University, Zhengzhou

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Electric inverters; Multilevel; Neutral-point-clamped; Switched capacitor; Voltage balance;

D O I：

10.16081/j.epae.202005019

中图分类号：

TM7 [输配电工程、电力网及电力系统];

学科分类号：

080802 ;

摘要：

A single phase voltage source neutral-point-clamped multilevel inverter with switched capacitors is proposed. The DC bus clamped capacitors are configured to segment the power supply voltage, and the multilevel voltage output can be achieved by controlling the connection of power supply and capacitors in series or parallel. In addition, the output level quantity and voltage gain of the inverter can be further increased through an expansion mechanism. In order to achieve the voltage balance of the capacitors and reduce their voltage ripples, the redundant switch states of the inverter are considered during the modulation process. The switches work in a complementary way, and therefore, the modulation strategy is simple to imple-ment. The working principle, modulation strategy, capacitor voltage and related parameters of the proposed inverter are analyzed, and the topology extension mechanism is given. Finally, the steady performance and dynamic performance of the proposed inverter are verified by simulation and experiment. © 2020, Electric Power Automation Equipment Press. All right reserved.

引用

页码：89 / 95

页数：6

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