A Dual-Buck–Boost AC/DC Converter for DC Nanogrid With Three Terminal Outputs

Weimin Wu, Houqing Wang, Yuan Liu, Huang Min, Frede Blaabjerg

Research output: Contribution to journalJournal articleResearchpeer-review

22 Citations (Scopus)

Abstract

Due to the widely used dc characterized loads and more distributed power generation sources, the dc nanogrid becomes more and more popular, and it is seen as an alternative to the ac grid. For safety considerations, the dc nanogrid should provide reliable grounding for the residential loads such as the low-voltage ac power system. There are three typical grounding configurations for a dc nanogrid: the united grounding, the unidirectional grounding, and the virtual isolated grounding. Each grounding configuration has its own specifications to ac/dc converters. In this paper, a dual-buck-boost ac/dc converter for use in the united-grounding-configuration-based dc nanogrid with three terminal outputs is proposed. The working principle of this converter is presented in detail through analyzing the equivalent circuits. Experiments are carried out to verify the theoretical analysis.
Original languageEnglish
JournalI E E E Transactions on Industrial Electronics
Volume64
Issue number1
Pages (from-to)295-299
Number of pages5
ISSN0278-0046
DOIs
Publication statusPublished - Jan 2017

Keywords

  • Grounding
  • AC/DC converter
  • Buck-boost
  • DC nanogrid

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