Aggregated Modeling and Power Hardware-in-the-Loop Emulation of Grid Impedance

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    5 Citations (Scopus)
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    The rapid growth of renewable energy production increases the number of grid-connected inverters in the power system. The interface between the inverter and the grid may face stability issues, which can be assessed using impedance-based stability criterion. The frequency-dependent grid impedance is often an unknown parameter, and vastly simplified grid impedance models are widely used. Most common modeling approach is to use series-connected inductor as the grid impedance. However, measurements on real grids have shown the grid to be more complex, resonant, and time-variant. This paper introduces a grid-impedance model based on aggregation of sub-models, which drastically simplifies complex grid modeling, while still accurately captures resonances and possible time-variant behavior. Numerical sensitivity analysis is carried out for grid parameters to illustrate the significance of separate grid elements. Lastly, impedance measurements are shown for emulated full-order and aggregated impedance models in an experimental power hardware-in-the-loop setup.
    Original languageEnglish
    Title of host publicationThe 10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018)
    Subtitle of host publicationSeptember 23-27, 2018, Portland, Oregon, USA
    Number of pages8
    ISBN (Electronic)978-1-4799-7312-5
    Publication statusPublished - 6 Dec 2018
    Publication typeA4 Article in conference proceedings
    EventIEEE Energy Conversion Congress and Exposition - Portland, United States
    Duration: 23 Sept 201827 Sept 2018

    Publication series

    ISSN (Electronic)2329-3748


    ConferenceIEEE Energy Conversion Congress and Exposition
    Country/TerritoryUnited States

    Publication forum classification

    • Publication forum level 1


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