An Efficient Reduced-Order Model for Studying Synchronization Stability of Grid-Following Converters during Grid Faults

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Abstract

Renewable energy sources interfaced with the grid through power-electronic converters may lose stability and capability to perform as desired when exposed to severe grid faults. As a result of this, transient stability analysis and assessment are particularly important for power system studies. Usually, synchronization stability and transient stability analysis are performed by simulation studies containing a large amount of details, which makes this process highly time-consuming for large-scale systems. To circumvent this issue, a nonlinear second-order model is developed to capture the essential effects of the synchronization process of grid-tied converters during faults. Due to this low-order model, the stability assessment can be approached using phase-plane analysis with a low computational burden - more than 4000 times faster than the full-order switching model. The simplified model is verified against a detailed switching model and laboratory setup of the entire converter system indicating a high accuracy (>96%). Accordingly, the simplified reduced-order model can be used for accurate transient stability studies when a low availability of computational power is present, if large-scale systems are considered, or for detailed uncertainty and sensitivity analysis.
Original languageEnglish
Title of host publicationProceedings of 2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL)
Number of pages7
PublisherIEEE Press
Publication dateJun 2019
ISBN (Electronic)9781728118420
DOIs
Publication statusPublished - Jun 2019
Event2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL) - Toronto, Canada
Duration: 17 Jun 201920 Jun 2019

Conference

Conference2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL)
CountryCanada
CityToronto
Period17/06/201920/06/2019
SeriesIEEE Workshop on Control and Modeling for Power Electronics (COMPEL)
ISSN1093-5142

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Keywords

  • Grid fault
  • Transient Stability
  • Reduced-order model
  • Grid-connected converters

Cite this

Taul, M. G., Wang, X., Davari, P., & Blaabjerg, F. (2019). An Efficient Reduced-Order Model for Studying Synchronization Stability of Grid-Following Converters during Grid Faults. In Proceedings of 2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL) IEEE Press. IEEE Workshop on Control and Modeling for Power Electronics (COMPEL) https://doi.org/10.1109/COMPEL.2019.8769676