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Research on the Asymmetrical Multilevel Hybrid Energy Storage System Based on Hybrid Carrier Modulation.

Authors :
Jiang, Wei
Ren, Kai
Xue, Shuai
Yang, Chen
Xu, Zhiqi
Source :
IEEE Transactions on Industrial Electronics; Feb2021, Vol. 68 Issue 2, p1241-1251, 11p
Publication Year :
2021

Abstract

In this article, when the cascaded H-bridge topology is used in the asymmetrical multilevel hybrid energy storage system (AM-HESS), the asymmetry of the energy storage components’ types and voltages makes it difficult for traditional modulation methods to realize an independent power control of each energy storage unit. Thus, these methods cannot be directly applied to the realization of the complex working modes of AM-HESS. To this end, an AM-HESS hybrid level shifted pulsewidth modulation (PWM) (HLS-PWM) technique is proposed. According to the directions of supercapacities’ (SCs’) output power and the total output power of the energy storage system, the HLS-PWM is divided into the two fundamental modes—the same (MP) and opposite (MN) modes. Subsequently, the SC charge and discharge control under both the unit power factor and the nonunit power factor is analyzed for the two modes. Furthermore, five operation modes and the power control method of AM-HESS are implemented through the charge and discharge control of the SC. Finally, simulation and experimental results verify that the proposed HLS-PWM can realize an efficient power control of the AM-HESS. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02780046
Volume :
68
Issue :
2
Database :
Complementary Index
Journal :
IEEE Transactions on Industrial Electronics
Publication Type :
Academic Journal
Accession number :
146892220
Full Text :
https://doi.org/10.1109/TIE.2020.2967723