A New Buck-Boost AC/DC Converter with Two-Terminal Output Voltage for DC Nano-Grid

Xiangkun Li, Weimin Wu, Houqing Wang, Ning Gao, Henry Shu-hung Chung and Frede Blaabjerg
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Xiangkun Li: Department of Electronic Engineering, Shanghai Maritime University, Shanghai 201306, China
Weimin Wu: Department of Electronic Engineering, Shanghai Maritime University, Shanghai 201306, China
Houqing Wang: Department of Electronic Engineering, Shanghai Maritime University, Shanghai 201306, China
Ning Gao: Department of Electronic Engineering, Shanghai Maritime University, Shanghai 201306, China
Henry Shu-hung Chung: Department of Electronic Engineering, City University of Hong Kong, Hong Kong 999077, China
Frede Blaabjerg: Department of Energy Technology, Aalborg University, Aalborg DK-9220, Denmark

Energies, 2019, vol. 12, issue 20, 1-18

Abstract: Due to the development and deployment of renewable DC power sources and their inherent advantages for DC loads in applications, the DC nano-grid has attracted more and more research attentions; especially the topologies of AC/DC converters are increasingly studied. When designing an AC to DC converter for a DC nano-grid system, the grounding configuration, which determines the costs, the efficiency as well as the safety, plays an important role. A three-terminal output AC to DC converter based on united grounding configuration has been presented for DC nano-grid. However, it has to be pointed out that the three-terminal output DC nano-grid is not as popular as the two-terminal DC output one, due to the infrastructure consideration. This paper proposes a new Buck-Boost AC to DC converter with two-terminal output voltage for DC nano-grid. The operating principle, the steady-state analysis, and the small signal modelling for the proposed converter working in continuous conduction mode are presented in detail. A 220 V/50 Hz/800 W prototype was fabricated to verify the effectiveness of the proposed converter.

Keywords: buck-boost; converter; dc nano-grid; single inductor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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