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    Fault Ride-through of a Grid-connected Photovoltaic System with Quasi Z Source Inverter

    245876.pdf (1.724Mb)
    Access Status
    Open access
    Authors
    Al-Durra, A.
    Fayyad, Y.
    Muyeen, S.M.
    Blaabjerg, F.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Al-Durra, A. and Fayyad, Y. and Muyeen, S.M. and Blaabjerg, F. 2016. Fault Ride-through of a Grid-connected Photovoltaic System with Quasi Z Source Inverter. Electric Power Components and Systems. 44 (16): pp. 1786-1800.
    Source Title
    Electric Power Components and Systems
    DOI
    10.1080/15325008.2016.1188430
    ISSN
    1532-5008
    School
    Department of Electrical and Computer Engineering
    Remarks

    This is an Author's Original Manuscript of an article published by Taylor & Francis in Electric Power Components and Systems on 6/09/2016 available online at http://www.tandfonline.com/10.1080/15325008.2016.1188430

    URI
    http://hdl.handle.net/20.500.11937/35608
    Collection
    • Curtin Research Publications
    Abstract

    This article presents fault ride-through schemes for a three-phase quasi Z source single-stage photovoltaic (PV) inverter that is connected to the grid after the distribution network. The quasi Z source inverter employs a unique LC network to couple the inverter main circuit to the input of the PV panel. By controlling the shoot-through duty cycle, the quasi Z source inverter can theoretically produce any desired output AC voltage, even greater than the line voltage. Three different control strategies to improve the low-voltage ride-through capability are proposed when there is voltage sag from the grid side so that the grid fault ride-through requirements can be fulfilled. Scheme A involves control modification in the system; Schemes B and C involve hardware modification in the circuit topology by adding a chopper circuit across the DC link in Scheme B and across the quasi Z source inverter capacitor in Scheme C. A comparative study among the different control schemes is carried out to see the effectiveness of the control schemes under different types of symmetrical and unsymmetrical fault conditions. Observations based on comparing simulations and recommendations are reported.

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