Capacitive Grounding for DC Distribution Grids with Two Grounding Points

Elisabeth Vandeventer, Laurens Mackay, Kenji F. Yanez Martinez, Laura Ramirez-Elizondo, Pavol Bauer

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

Connecting large dc distribution grids on the same voltage level can allow superior utilization of infrastructure. Selective ground fault protection is necessary and can be done using low impedance grounding. Distributed energy resources would allow for higher resilience of the grid if islanding operation of dc microgrids is allowed. For safety, grounding is essential in these islanded microgrids so individual grounding points are needed. Multiple low impedance grounding points would cause dc ground currents that lead to corrosion. This paper introduces capacitive grounding which is high impedance in steady-state effectively eliminating ground currents but is low impedance for fault transients and thus can allow for selective ground fault protection. The sensitivity of the capacitor sizing for two grounding points is shown. Further an initial filter for ground fault discrimination is analyzed.

Original languageEnglish
Title of host publication2017 IEEE Second International Conference on DC Microgrids, ICDCM 2017
Place of PublicationPiscataway, NJ
PublisherIEEE
Pages76-80
Number of pages5
ISBN (Electronic)978-1-5090-4479-5
DOIs
Publication statusPublished - 2017
EventICDCM 2017: 2nd IEEE International Conference on DC Microgrids - Nürnberg, Germany
Duration: 27 Jun 201729 Jun 2017
Conference number: 2

Conference

ConferenceICDCM 2017
Abbreviated titleICDCM
CountryGermany
CityNürnberg
Period27/06/1729/06/17

Keywords

  • Grounding
  • Capacitors
  • Capacitance
  • Impedance
  • Load modeling
  • 1/f noise
  • Sensitivity

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