Multi-objective modulation strategy for neutral point clamped three-level inverter

被引：0
|
作者：
Jiang W. [1 ]
Dong H. [1 ]
Wang J. [1 ]
Ji Y. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Hefei University of Technology, Hefei
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2024年 / 44卷 / 01期
关键词：
common mode voltage; modulation strategy; neutral point voltage balance; switching loss; three-level inverter;
D O I：
10.16081/j.epae.202303022
中图分类号：
学科分类号：
摘要：
In order to realize the neutral point voltage balance and common mode voltage reduction of the neutral point clamped three-level inverter at the same time，the neutral point voltage balance and common mode voltage reduction methods based on carrier-based pulse width modulation（CBPWM） and virtual space vector pulse width modulation（VSVPWM） are analyzed respectively. A novel modulation strategy，reducing common mode voltage carrier-based pulse width modulation（RCMV_CBPWM），is proposed based on CBPWM，which can limit the common mode voltage of most working areas to one-sixth of the DC side voltage. In order to achieve the above two objectives without excessively increasing the switching loss，a multi-objective pulse width modulation（MOPWM） strategy based on RCMV_CBPWM is proposed. In the range of full modulation and full load power factor，the common mode voltage can be limited to one-sixth of the DC side voltage and the neutral point voltage balance can be achieved，and its switching loss is lower than VSVPWM. The performance of MOPWM，RCMV_CBPWM and VSVPWM in the aspects of neutral point voltage control，common mode voltage reduction and switching loss reduction are compared. Experimental results verify the feasibility and superiority of MOPWM. © 2024 Electric Power Automation Equipment Press. All rights reserved.
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页码：160 / 166and224
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