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 language | English |
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Title of host publication | 2017 IEEE Second International Conference on DC Microgrids, ICDCM 2017 |
Place of Publication | Piscataway, NJ |
Publisher | IEEE |
Pages | 76-80 |
Number of pages | 5 |
ISBN (Electronic) | 978-1-5090-4479-5 |
DOIs | |
Publication status | Published - 2017 |
Event | ICDCM 2017: 2nd IEEE International Conference on DC Microgrids - Nürnberg, Germany Duration: 27 Jun 2017 → 29 Jun 2017 Conference number: 2 |
Conference
Conference | ICDCM 2017 |
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Abbreviated title | ICDCM |
Country/Territory | Germany |
City | Nürnberg |
Period | 27/06/17 → 29/06/17 |
Keywords
- Grounding
- Capacitors
- Capacitance
- Impedance
- Load modeling
- 1/f noise
- Sensitivity