Extended Boost Single-phase qZ-Source Inverter for Photovoltaic Systems

• DOI: 10.6113/jpe.2014.14.5.918
• Publication Date: 2014-11-20T07:35:42Z
• Authors: Hyun-Hak Shin; Honnyong Cha; Hongjoon Kim; Heung-Geun Kim
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; 7. Clean energy

This study presents an extended boost single-phase qZ-source DC–AC inverter for a single-phase photovoltaic system. Unlike the previously proposed single-phase qZ-source and semi-qZ-source inverters that achieve the same output voltage as that of the traditional voltage-fed full-bridge inverter, the proposed inverter can obtain higher output than input voltage. The proposed inverter also shares a common ground between DC input voltage and AC output voltage. Thus, possible ground leakage current problem in non-isolated grid-tied inverters can be eliminated with the proposed inverter. A 120 W prototype inverter is built and tested to verify the performance of the proposed inverter.