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; Edris Pouresmaeil

doi:10.3390/en12112139

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, Edris Pouresmaeil

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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.

Original language	English
Article number	2139
Number of pages	17
Journal	Energies
Volume	12
Issue number	11
DOIs	https://doi.org/10.3390/en12112139
Publication status	Published - 2019
MoE publication type	A1 Journal article-refereed

Keywords

Partial power processing
Quasi Z-source converters
High step up converters

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ELEC_Honarmand_A-Modified-Partial_Energies_12_11_2139_finalFinal published version, 8.98 MBLicence: CC BY

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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. ",

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AU - Pouresmaeil, Edris

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

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