Impact of frequency control from wind turbine generator linked to HVDC system on sub-synchronous oscillation

Dongyeong Lee, Sungwoo Kang, Junghun Lee, Gilsoo Jang

    Research output: Contribution to journalArticlepeer-review

    Abstract

    With global trends of carbon neutrality, offshore wind energy is considered as the most promising resource. However, as large-scale renewable energy resources replace the existing synchronous generators (SG), concerns about the system stability are growing. Owing to the absence of system supports provided by the SG. Therefore, operators require the wind generators to participate in frequency control. In addition, controls have been devised to perform frequency support even when large-scale offshore wind farm (OWF) linked to High Voltage Direct Current (HVDC). However, this frequency support control's impacts on the overall system stability are not investigated in deeply yet. Therefore, in this study, the impacts of frequency control from OWF-linked HVDC system using communication-less scheme on the system instability were investigated using small-signal stability analysis. Its results revealed that this frequency support control caused instability. Modal analysis and simulations support these interpretations and improve the understanding its mechanism and dynamics.

    Original languageEnglish
    Pages (from-to)116-124
    Number of pages9
    JournalEnergy Reports
    Volume9
    DOIs
    Publication statusPublished - 2023 Oct

    Bibliographical note

    Funding Information:
    This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (No. 20210501010010 ) and supported by Korea Electric Power Corporation ( R20XO02-4 ).

    Publisher Copyright:
    © 2023 The Author(s)

    Keywords

    • Frequency support control
    • Modal analysis
    • Small-signal stability
    • Sub-synchronous oscillation
    • Wind-linked HVDC system

    ASJC Scopus subject areas

    • General Energy

    Fingerprint

    Dive into the research topics of 'Impact of frequency control from wind turbine generator linked to HVDC system on sub-synchronous oscillation'. Together they form a unique fingerprint.

    Cite this