Analytical discussion on dynamics of inverter-based resources under small-signal conditions

Johanna Vorwerk, Mehdi Ghazavi Dozein, Pierluigi Mancarella, Gabriela Hug

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch


Grid integration of inverter-based resources (IBRs) and the consequent phase-out of synchronous machines cause a reduction in system strength and inertia, which may pose system instability challenges, including small-signal and inverter-driven instability. There is an ongoing discussion on the contributing factors to IBR stability, synchronism, and response specifications (e.g., response time, damping) under various grid conditions and characteristics. This paper presents an analytical discussion highlighting how grid characteristics such as short-circuit ratio, R/X ratio, and system loading conditions may affect IBR stability and synchronism under small-signal conditions. Furthermore, the contributing factors to IBR response characteristics imposed by the external grid are identified. The analytical discussion highlights the need to consider such factors when determining grid-code requirements for IBR response specifications and stability conditions.

Original languageEnglish
Title of host publication2023 IEEE Belgrade PowerTech
EditorsVladimir Terzija, Goran Dobric
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9781665487788, 9781665487771
ISBN (Print)9781665487795
Publication statusPublished - 2023
Externally publishedYes
EventIEEE Belgrade PowerTech 2023 - Belgrade, Serbia
Duration: 25 Jun 202329 Jun 2023 (Proceedings) (Website)


ConferenceIEEE Belgrade PowerTech 2023
Abbreviated titlePowerTech 2023
Internet address


  • IBR
  • IBR stability
  • Power system dynamics
  • Small-signal analysis
  • Weak grid

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