Modeling and Control of Single-Phase Quasi-Z-Source Inverters

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Abstract

Compared with a conventional two-stage inverter, the quasi-Z-source inverter (qZSI) has several advantages for renewable applications because of its buck-boost capability and continuous input current. This paper addresses modeling and control issues resulted from the impedance-source network resonance. Considering shoot-through states, null states, and active states, the modulation ratio is included in the modeling process. Unlike prior-art modeling methods to separate the DC and AC parts, the proposed modeling method considers the impedance source network as an open-loop impedance at the input of the AC side. The resonant characteristic of the converter is investigated and the AC controller is designed in detail. Simulations are presented to validate the modeling and control methods.
Original languageEnglish
Title of host publicationProceedings of 44th Annual Conference of the IEEE Industrial Electronics Society : IECON 2018
Number of pages6
PublisherIEEE Press
Publication dateOct 2018
Pages3737-3742
ISBN (Print)978-1-5090-6685-8
ISBN (Electronic)978-1-5090-6684-1
DOIs
Publication statusPublished - Oct 2018
Event44th Annual Conference of the IEEE Industrial Electronics Society - Omni Shoreham Hotel, Washington, United States
Duration: 21 Oct 201823 Oct 2018
http://www.iecon2018.org/

Conference

Conference44th Annual Conference of the IEEE Industrial Electronics Society
LocationOmni Shoreham Hotel
CountryUnited States
CityWashington
Period21/10/201823/10/2018
Internet address

Keywords

  • Quasi-Z-source
  • small signal modeling
  • equivalent open-loop impedance
  • modeling

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  • Cite this

    Liu, W., Yuan, J., Yang, Y., & Kerekes, T. (2018). Modeling and Control of Single-Phase Quasi-Z-Source Inverters. In Proceedings of 44th Annual Conference of the IEEE Industrial Electronics Society: IECON 2018 (pp. 3737-3742). IEEE Press. https://doi.org/10.1109/IECON.2018.8592814