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    A hybrid discontinuous voltage controller for DSTATCOM applications

    Access Status
    Fulltext not available
    Authors
    Goyal, S.
    Ghosh, Arindam
    Ledwich, G.
    Date
    2008
    Type
    Conference Paper
    
    Metadata
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    Citation
    Goyal, S. and Ghosh, A. and Ledwich, G. 2008. A hybrid discontinuous voltage controller for DSTATCOM applications, in - (ed), IEEE Power and Energy Society 2008 General Meeting: Conversion and Delivery of Electrical Energy in the 21st Century, PES, Jul 20 2008. US: Institute of Electrical and Electronics Engineers ( IEEE ).
    Source Title
    2008 IEEE Power & Energy Society General Meeting
    Source Conference
    IEEE Power and Energy Society 2008 General Meeting: Conversion and Delivery of Electrical Energy in the 21st Century, PES
    ISBN
    978-1-4244-1905-0
    URI
    http://hdl.handle.net/20.500.11937/36472
    Collection
    • Curtin Research Publications
    Abstract

    This paper proposes a hybrid discontinuous control methodology for a voltage source converter (VSC) based distribution static compensator (DSTATCOM) connected to a 3-phase distribution system. It is assumed that the DSTATCOM controls the point of common coupling (PCC) voltage. An LC output filter is connected at the output of the VSC. With the help of both filter inductor current and filter capacitor voltage control, the voltage across the filter capacitor is controlled. Based on the voltage error, the control is switched between voltage and current control mode. In this scheme, an extra diode state is used that makes the VSC output current discontinuous. This diode state reduces the switching losses because half of the total switching occurs at nearly zero converter current. The effects of different source conditions on voltage at PCC are studied. Voltage angle at PCC is controlled using a PI controller. Simulation studies are performed using PSCAD to validate the efficacy of the proposed controller.

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