Modified Modulation Strategy and Power Balance Control Method for Hybrid Nine-level Inverter

被引：0

作者：

Ye M. ^{[1
]}

Wei Q. ^{[1
]}

Ren W. ^{[1
]}

Song G. ^{[1
]}

Chen L. ^{[1
]}

机构：

[1] School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang

来源：

Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Current inrush; Hybrid cascade; Modulation strategy; Multilevel inverter; Power balance;

D O I：

10.13336/j.1003-6520.hve.20200224008

中图分类号：

学科分类号：

摘要：

Three-cell nine-level inverter can output more voltage levels with fewer h-bridge cells, and has better output waveform quality. However, in the conventional hybrid frequency modulation strategy, only one low-voltage cell adopts PWM mod-ulation, which causes the problem of switching loss and uneven heat distribution between the two low-voltage cells. At the same time, the conventional modulation strategy also has a disadvantage of unbalance of output power. Aiming at the above problems, we propose a modified hybrid modulation strategy and a power balance control method under the strategy. The modulation strategy achieves output power equalization between the three cells and an even distribution of switching losses between the two low voltage cells while maintaining the same output power quality. Simulation and experimental results verify the feasibility of the modulation strategy. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：4420 / 4429

页数：9

共 18 条

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