Impact of Increased Inverter-Based Resources on Power System Small-Signal Stability

Yashen Lin, Gab-Su Seo, Sanjana Vijayshankar, Brian Johnson, Sairaj Dhople

Research output: Contribution to conferencePaperpeer-review

7 Scopus Citations

Abstract

The transformation of the power system to include more distributed energy resources (DER) implies an increase in the number of inverter-based resources deployed on the grid. Envisioning future scenarios, this paper presents a small-signal stability analysis for a power grid comprising synchronous generators and inverter-based resources. Three types of inverter control are considered: grid following, droop-controlled grid forming, and virtual oscillator control grid forming. Although small-signal stability of power systems is a widely studied topic, systematic analysis of mixed machine-inverter systems with detailed control models at various inverter levels are limited. This paper addresses the gap with numerical simulations tailored to the IEEE 39-bus system. Results show the system may become unstable at high inverter level of grid-following inverters, and grid-forming inverter control can potentially improve system stability, thereby enabling very high level of DERs.

Original languageAmerican English
Number of pages5
DOIs
StatePublished - 2021
Event2021 IEEE Power and Energy Society General Meeting, PESGM 2021 - Washington, United States
Duration: 26 Jul 202129 Jul 2021

Conference

Conference2021 IEEE Power and Energy Society General Meeting, PESGM 2021
Country/TerritoryUnited States
CityWashington
Period26/07/2129/07/21

Bibliographical note

See NREL/CP-5D00-78448 for preprint

NREL Publication Number

  • NREL/CP-5D00-82280

Keywords

  • Grid-following inverter grid forming inverter
  • inverter-based resources
  • modal analysis
  • power system stability
  • small-signal stability

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