NDLI: Asymmetric cascade multilevel inverter with self-balanced switched-capacitor unit and single source

Content Provider	IET Digital Library
Author	Ye, Yuanmao Lin, Mingliang Wang, Xiaolin
Abstract	The technique of single-source cascaded H-bridge multilevel inverter (MLI) has been reported in previous works. In this study, a self-balanced series/parallel switched-capacitor (SC) is introduced to further develop this type of MLIs to generate more output levels. Each cascaded H-bridge is fed by an SC unit. All components in each SC unit withstand the same voltage stress, but different SC units address different voltages. With this asymmetric feature, different H-bridges are responsible for providing levels with different voltage intervals so that the cascaded MLI can generate numerous levels with a single dc source and fewer components. Compared with the conventional asymmetrical cascaded MLIs, just a single dc source is required, capacitors’ voltages are balanced automatically, high boosting ability and more output levels are achieved with SC technique in the proposed MLIs. To synthesise the output voltage as close as possible to sinusoidal shape but with less switching loss, comparative analysis of nearest level control and equal area criterion is provided to modulate the proposed MLI with 13-level output. Experimental results demonstrate that the proposed MLI has high efficiency and low harmonics.
Starting Page	3254
Ending Page	3262
Page Count	9
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 15, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/15
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.1098
Journal	IET Power Electronics
Publisher Date	2020-07-30
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	13-level Output Active Filter Active Network Asymmetric Cascade Multilevel Inverter Asymmetric Feature Asymmetrical Cascaded MLI Bridge Circuit Capacitor Cascade Network Control of Electric Power System Equal Area Criterion Fewer Component Invertors Nearest Level Control Output Levels Output Voltage Power Electronics Power Supply SC Unit SC Units Self-balanced Series Single Dc Source Single-source Cascaded H-bridge Multilevel Inverter Supervisory Circuit Switched Capacitor Integrator Switched-capacitor Unit Switching Converter Switching Loss Voltage Intervals Voltage Stress
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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