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    Performance comparison of VSC-based shunt and series compensators used for load voltage control in distribution systems

    Access Status
    Fulltext not available
    Authors
    Gupta, R.
    Ghosh, Arindam
    joshi, A.
    Date
    2011
    Type
    Journal Article
    
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    Citation
    Gupta, R. and Ghosh, A. and joshi, A. 2011. Performance comparison of VSC-based shunt and series compensators used for load voltage control in distribution systems. IEEE Transactions on Power Delivery. 26 (1): pp. 268-278.
    Source Title
    IEEE Transactions on Power Delivery
    ISSN
    08858977
    URI
    http://hdl.handle.net/20.500.11937/48250
    Collection
    • Curtin Research Publications
    Abstract

    In this paper, the performance of voltage-source converter-based shunt and series compensators used for load voltage control in electrical power distribution systems has been analyzed and compared, when a nonlinear load is connected across the load bus. The comparison has been made based on the closed-loop frequency response characteristics of the compensated distribution system. A distribution static compensator (DSTATCOM) as a shunt device and a dynamic voltage restorer (DVR) as a series device are considered in the voltage-control mode for the comparison. The power-quality problems whichthese compensator address include voltage sags/swells, load voltage harmonic distortions, and unbalancing. The effect of various system parameters on the control performance of the compensator can be studied using the proposed analysis. In particular, the performance of the two compensators are compared with the strong ac supply (stiff source) and weak ac-supply (non-stiff source) distribution ystem. The experimental verification of the analytical results derived has been obtained using a aboratory model of the single-phase DSTATCOM and DVR. A generalized converter topology using a cascaded multilevel inverter has been proposed for the medium-voltage distribution system. Simulationstudies have been performed in the PSCAD/EMTDC software to verify the results in the three-phase system.

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