Novel Hybrid Current Limiter for Grid-Forming Inverter Control During Unbalanced Faults

Research output: Contribution to conferencePaper

3 Scopus Citations

Abstract

Grid-forming (GFM) inverter controls have illustrated many desirable features to enable the bulk integration of renewable resources into the future power grid; however, the performance of GFM inverters during unbalanced faults remains underexplored. This paper proposes a novel current-limiting method for GFM inverters to handle unbalanced fault conditions while providing voltage support to the main grid. The proposed current limiter combines concepts of dynamic virtual-impedance and current-reference saturation limiting, all built in the stationary reference frame, to achieve improved current-limiting performance under unbalanced load/fault conditions. System-wide full-order transient simulations with multiple GFM inverters demonstrate the potential of the method and benchmark the performance against state-of-the-art current limiters. Simulation results portray improved voltage balancing performance of the proposed method compared to both current-reference saturation and virtual-impedance limiting.
Original languageAmerican English
Number of pages6
DOIs
StatePublished - 2023
Event2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia) - Jeju Island, Korea
Duration: 22 May 202325 May 2023

Conference

Conference2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia)
CityJeju Island, Korea
Period22/05/2325/05/23

Bibliographical note

See NREL/CP-5D00-85527 for preprint

NREL Publication Number

  • NREL/CP-5D00-87690

Keywords

  • controller anti windup
  • grid-forming
  • inverter current limit
  • inverter-based resources
  • stationary reference frame control
  • unbalanced fault

Fingerprint

Dive into the research topics of 'Novel Hybrid Current Limiter for Grid-Forming Inverter Control During Unbalanced Faults'. Together they form a unique fingerprint.

Cite this