An Improved Modulation Strategy Combining Phase Shifted PWM and Phase Disposition PWM for Cascaded H-Bridge Inverters

被引：14
|
作者：
Xiao, Muxuan [1 ]
Xu, Qianming [1 ]
Ouyang, Honglin [1 ]
机构：
[1] Hunan Univ, Coll Elect & Informat Engn, Changsha 410082, Hunan, Peoples R China
来源：
ENERGIES | 2017年 / 10卷 / 09期
基金：
中国国家自然科学基金;
关键词：
cascaded H-bridge inverter; pulse width modulation; power conversion harmonics; SPACE VECTOR; MULTILEVEL; CONVERTERS;
D O I：
10.3390/en10091327
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Multilevel modulation strategy is an important factor affecting the output performance of multilevel converters. In this paper, the relationship between phase-shifted pulse width modulation (PWM) and phase disposition PWM is analyzed, and then an improved hybrid modulation strategy is proposed for cascaded H-bridge. In addition, the implementation method of multilevel discontinuous modulation for an improved modulation strategy is described. The new modulation strategy is optimized to increase the DC link voltage utilization and further improvement in output harmonics by the injection of a common voltage into the reference. Simulation and experiment verify the effectiveness of the proposed modulation strategy.
引用
收藏
页数：14
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