Dynamic Interaction of Grid-Forming and Grid-Following Inverters with Synchronous Generators in Hybrid Power Plants

Amirhossein Sajadi, Rick Wallace Kenyon, Matthew Bossart, Bri Mathias Hodge

Research output: Contribution to conferencePaperpeer-review

5 Scopus Citations

Abstract

As the integration of renewable energy resources such as wind and solar generation continues to grow, the use of hybrid power plants with both synchronous machines and power electronic inverters operating in parallel becomes more common. This paper studies the impact on small-signal stability for these pairs of devices, first as an isolated two-device system and then as part of a 9-bus test system. Each operational scenario was studied with both a grid-following inverter and a grid-forming inverter. In each scenario, the state variables associated with the synchronous generator’s excitation system were found to be responsible for the inception of instability. These results underscore the importance of accurate modeling of excitation systems when modeling power systems with hybrid power plants.

Original languageAmerican English
Number of pages6
DOIs
StatePublished - 2021
Event2nd Annual IEEE Kansas Power and Energy Conference, KPEC 2021 - Manhattan, United States
Duration: 19 Apr 202120 Apr 2021

Conference

Conference2nd Annual IEEE Kansas Power and Energy Conference, KPEC 2021
Country/TerritoryUnited States
CityManhattan
Period19/04/2120/04/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE

NREL Publication Number

  • NREL/CP-6A40-81260

Keywords

  • Hybrid power plant
  • Inverter-based resources
  • Power system dynamic stability
  • Renewable energy
  • Synchronous machine

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