NDLI: Modified dual buck–boost AC/DC converter with self-balanced DC output voltages

Content Provider	IET Digital Library
Author	Wang, Houqing Wu, Weimin Gao, Ning He, Yuanbin Chung, Henry Shu hung Blaabjerg, Frede
Abstract	With wide applications of DC loads and renewable energy generation sources, the DC micro-grid becomes more and more attractive, especially regarding active AC/DC converters. Recently, a high-efficiency buck–boost AC/DC converter with three terminal outputs has been presented for DC micro-grid. However, the main drawback of this converter is that the output voltages become unbalanced in the case of unequal DC loads, which causes a challenge in practical applications. In this study, a modified buck–boost AC/DC converter with self-balanced DC output voltages is proposed. Equivalent circuits are used to analyse the operating principle of the proposed converter. As an important part of the proposed converter, the coupled inductor is designed, while the design procedure is described in detail. The dead-beat control method is adopted to shape the waveform of the coupled inductor current. A 220 V/50 Hz/1.5 kW prototype is developed, and detailed experiments are carried out to corroborate the validity of the proposed converter.
Starting Page	1170
Ending Page	1178
Page Count	9
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 5, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.6046
Journal	IET Power Electronics
Publisher Date	2019-01-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC-DC Power Converter Control of Electric Power System Coupled Inductor Current Coupled Inductor Design Current Control DC Loads DC Microgrid Dead-beat Control Method Distributed Power Generation Electric Current Control Frequency 50.0 Hz Inductor Modified Dual Buck–boost AC/DC Converter Power 1.5 KW Renewable Energy Generation Source Self-balanced DC Output Voltage Transformer And Reactors Voltage 220.0 V Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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