Ground Fault Protection of Synchronous Generators with Frequency-Selective Grounding

S. Saleh, D. Jewett, J. Meng, M. Valdes, R. Ahshan, S. Panetta, C. Mardegan

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

1 Citation (Scopus)


This paper experimentally evaluates responses of ground fault protection for synchronous generators, which are grounded using frequency-selective grounding. Frequency-selective grounding is designed to provide a low ground impedance path (similar to solid grounding) for high frequency zero-sequence current components. This grounding system also provides an impedance similar to a low-resistance grounding for low frequency zero-sequence current components. The frequency-dependent equivalent impedance of frequency-selective grounding can affect ground potential and current, which are typically used as inputs for ground fault protective relays. Effects of frequency-selective grounding on ground fault protection are experimentally evaluated using a 7.5 kVA synchronous generator. Experimental tests are conducted for different implementations of ground fault protection, when responding to fault and non-fault events. Evaluation results detailed in this paper demonstrate the negligible effects of frequency-selective grounding on responses of different ground fault protection relays.

Original languageEnglish
Title of host publication2022 IEEE Industry Applications Society Annual Meeting, IAS 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages8
ISBN (Electronic)9781665478151
Publication statusPublished - Oct 9 2022
Event2022 IEEE Industry Applications Society Annual Meeting, IAS 2022 - Detroit, United States
Duration: Oct 9 2022Oct 14 2022

Publication series

Name2022 IEEE Industry Applications Society Annual Meeting (IAS)


Conference2022 IEEE Industry Applications Society Annual Meeting, IAS 2022
Country/TerritoryUnited States


  • Frequency-selective grounding
  • ground fault protection of synchronous generators
  • power system faults

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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