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Open AccessArticle

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

1
Department of Electrical and Electronics Engineering, Shiraz University of Technology, Shiraz 71557-13876, Iran
2
Department of Electrical Engineering, Technical University of Catalonia, 08222 Barcelona, Spain
3
Department of Electrical Engineering and Automation, Aalto University, 02150 Oslo, Finland
*
Authors to whom correspondence should be addressed.
Energies 2019, 12(11), 2139; https://doi.org/10.3390/en12112139
Received: 18 April 2019 / Revised: 30 May 2019 / Accepted: 31 May 2019 / Published: 4 June 2019
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. View Full-Text
Keywords: partial power processing; quasi Z-source converters; high step up converters partial power processing; quasi Z-source converters; high step up converters
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MDPI and ACS Style

Honarmand, S.; Rajaei, A.; Shahparasti, M.; Luna, A.; Pouresmaeil, E. A Modified Partial Power structure for Quasi Z-Source Converter to Improve Voltage Gain and Power Rating. Energies 2019, 12, 2139.

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