A Modified Partial Power structure for Quasi Z-Source Converter to Improve Voltage Gain and Power Rating

Shahin Honarmand, Amirhossein Rajaei, Mahdi Shahparasti, Alvaro Luna and Edris Pouresmaeil
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Shahin Honarmand: Department of Electrical and Electronics Engineering, Shiraz University of Technology, Shiraz 71557-13876, Iran
Amirhossein Rajaei: Department of Electrical and Electronics Engineering, Shiraz University of Technology, Shiraz 71557-13876, Iran
Mahdi Shahparasti: Department of Electrical Engineering, Technical University of Catalonia, 08222 Barcelona, Spain
Alvaro Luna: Department of Electrical Engineering, Technical University of Catalonia, 08222 Barcelona, Spain
Edris Pouresmaeil: Department of Electrical Engineering and Automation, Aalto University, 02150 Oslo, Finland

Energies, 2019, vol. 12, issue 11, 1-17

Abstract: Employing partial power processing (PPP) technique for quasi Z-source converter (QZSC) a new structure of the converter is presented. Using PPP technique although eliminates electrical insolation, but permits reducing voltage and current stress at the semiconductors, if compared with full power proposals. In this work, two PPP structures are discussed: A first one, similar to the basic topology, where the output voltage of the power converter is in series with the input voltage; and a second one, where the output is in series with the capacitor of the QZSC. This minor modification, which requires no extra elements, improves the power rating, voltage gain, and requires a lower transformation ratio. An experimental prototype of the proposed converter has been tested and the results are compared with other implementations, permitting to validate the theoretical analysis as well as the advantages that this proposal provides.

Keywords: partial power processing; quasi Z-source converters; high step up converters (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
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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