Freedom Optimal Control of Cascaded H-bridge Inverter Power and Switching Loss Double Balance

被引：0
|
作者：
Li G. [1 ]
Li Y. [1 ]
Wu Z. [1 ]
机构：
[1] College of Electrical and Control Engineering, Liaoning Technical University, Liaoning Province, Huludao
来源：
Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 06期
基金：
中国国家自然科学基金;
关键词：
freedom optimization; PD-PWM; power balance; switching loss balance;
D O I：
10.13335/j.1000-3673.pst.2022.2473
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Taking into account the imbalance of the power and the switching loss in the cascaded H-bridge inverters, a double balanced method of the power and the switching loss for the nine-level cascaded H-bridge inverters based on the freedom optimal control is proposed. Firstly, the modulation wave position in the traditional phase disposition-pulse width modulation (PD-PWM) is vertically shifted to reduce the difficulties in the digital control and the amount of calculation. After that, the freedom of the stacked carrier is optimized for the first time to realize the power balance between the units at all levels on the premise of ensuring the excellent harmonic characteristics of the inverter output. Further, the freedom of the stacked carrier is optimized for the second time to balance the switching loss between the units at all levels and improve the equivalent switching frequency of the inverter. This method realizes the output power balance and the switching loss balance at all levels of the coupling units within the full modulation range. Finally, the correctness and feasibility of the method are verified by simulation and experiment. © 2023 Power System Technology Press. All rights reserved.
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页码：2433 / 2442
页数：9
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