Title: Dynamic analysis of quasi-Z-source converters considering parasitic elements

Authors: Gholamreza Shahabadi; Majid Reza Naseh; Fatemeh Bidar

Addresses: Department of Electrical Engineering, Birjand Branch, Islamic Azad University, Birjand, Iran ' Department of Electrical Engineering, Bi.C., Islamic Azad University, Birjand, Iran ' Department of Computer Engineering, Birjand Branch, Islamic Azad University, Birjand, Iran

Abstract: In this study, the Quasi-Z-source converter (QZSC) has been investigated, accounting for all parasitic elements in inductors, capacitors, and semiconductor components. The mathematical model and operational mode of the QZSC have been selected based on the state-space averaging method and continuous conduction mode. The dynamic behaviour of the system is examined using computational simulations, and the findings are presented through frequency response and pole-zero diagrams. The impact of the parasitic resistance of the inductor and capacitor on the gain of the QZSC has also been examined. Finally, the results of the simulations conducted with MATLAB software are presented to confirm the theoretical findings.

Keywords: Z-source-converter; quasi-Z-source-converter; small-signal model.

DOI: 10.1504/IJPELEC.2026.152431

International Journal of Power Electronics, 2026 Vol.22 No.2, pp.201 - 218

Received: 15 Dec 2024
Accepted: 04 Jun 2025
Published online: 19 Mar 2026 *

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