Pseudo-Random Sequences in DQ-Domain Analysis of Feedforward Control in Grid-Connected Inverters

Tomi Roinila, Tuomas Messo, Teuvo Suntio, Matti Vilkko

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

    13 Citations (Scopus)

    Abstract

    Grid-parallel inverters are typically used to connect renewable energy sources to a power grid. The impedance mismatch between the grid and the interfacing circuit can generate harmonic resonances which may lead to reduced power quality. The impedance mismatch can be mitigated by applying an inverter that employs feedforward control. This paper presents a novel DQ-domain technique, based on pseudo-random sequences, for acquiring the impedance information and verifying the effectiveness of the feedforward control. The results can be used for tuning the feedforward control and as a method to perform fast on-line stability analysis of grid-connected systems in the DQ domain.

    Original languageEnglish
    Title of host publication17th IFAC Symposium on System Identification SYSID 2015 – Beijing, China, 19–21 October 2015
    Pages1301-1306
    Number of pages6
    DOIs
    Publication statusPublished - 2015
    Publication typeA4 Article in conference proceedings
    EventIFAC SYMPOSIUM ON SYSTEM IDENTIFICATION -
    Duration: 1 Jan 1900 → …

    Publication series

    NameIFAC-PapersOnLine
    Number28
    Volume48
    ISSN (Print)2405-8963

    Conference

    ConferenceIFAC SYMPOSIUM ON SYSTEM IDENTIFICATION
    Period1/01/00 → …

    Keywords

    • Feedforward control
    • Fourier analysis
    • Frequency-response methods
    • Inverters
    • Signal analysis

    Publication forum classification

    • Publication forum level 0

    ASJC Scopus subject areas

    • Control and Systems Engineering

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