Adaptive Control of Grid-Connected Inverters Based on Real-Time Measurements of Grid Impedance: DQ-Domain Approach

Roni Luhtala, Tomi Roinila, Tuomas Messo, Tommi Reinikka, Jussi Sihvo, Matti Vilkko

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    25 Citations (Scopus)

    Abstract

    The increasing use of grid-connected inverters to connect renewable energy sources to a power grid will have globally important effect on grid performance. A mismatch between the grid and inverter impedance may cause harmonic
    resonances, which can lead to instability of the grid and disruption of inverter operation. The grid dynamics vary over time, so the inverter should adapt to the varying conditions to ensure system stability. Recent studies have presented online methods to adaptively control the grid-connected inverters in the sequence domain. This paper extends those previous studies, and presents
    an online method to adaptively control the inverters in the dq domain. In the method, the grid impedance is measured online using a pseudo-random-binary-sequence (PRBS) injection and Fourier techniques. The inverter control parameters are then adaptively adjusted based on the measurements. This paper
    presents experimental results based on a three-phase photovoltaic inverter using power hardware-in-the-loop (PHIL) setup.
    Original languageEnglish
    Title of host publicationIEEE Energy Conversion Congress and Expo
    Pages69-75
    Number of pages7
    DOIs
    Publication statusPublished - 7 Nov 2017
    Publication typeA4 Article in conference proceedings
    EventIEEE Energy Conversion Congress and Exposition -
    Duration: 1 Jan 1900 → …

    Conference

    ConferenceIEEE Energy Conversion Congress and Exposition
    Period1/01/00 → …

    Publication forum classification

    • Publication forum level 1

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