Frequency and Voltage Compliance Capability of Grid-Forming Wind Turbines in Offshore Wind Farms in Weak Grids with a Power Imbalance

Benjamin Vilmann, Jesper Hjerrild, Peter Jan Randewijk, Ashraf Khalil

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Grid-forming wind turbines are a promising technology for weak grids with a high penetration of converter-based power sources. The droop control, the synchronverter, and the virtual synchronous machine grid-forming control topologies are benchmarked by voltage and frequency stability performance from a frequency disturbance under different grid conditions (by varying short-circuit ratio, X/R ratio, and the inertia). The wind turbines are modelled in an offshore wind farm application and the frequency disturbance are scaled to 5% of the installed capacity. The study have shown that the virtual synchronous machine performs best regarding frequency and voltage compliance in weak grids under a frequency disturbance. DC-link modelling is essential for dynamic simulations of grid-forming converters, as grid perturbations can drain the link for energy.
Original languageEnglish
Title of host publicationProceedings of 2022 57th International Universities Power Engineering Conference (UPEC)
Number of pages8
PublisherIEEE
Publication date2022
ISBN (Electronic)978-1-6654-5505-3
DOIs
Publication statusPublished - 2022
Event57th International Universities Power Engineering Conference - Istanbul, Turkey
Duration: 30 Aug 20222 Sept 2022

Conference

Conference57th International Universities Power Engineering Conference
Country/TerritoryTurkey
CityIstanbul
Period30/08/202202/09/2022

Keywords

  • Frequency stability
  • Grid-forming
  • Weak grid
  • Voltage stability
  • Droop control
  • Synchronverter
  • Virtual synchronous machine
  • Offshore wind farm

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