Power Transformer Immune to Geomagnetically Induced Currents
(2013) IEEE Power & Energy Society General Meeting, 2013- Abstract
- Geomagnetically induced currents (GICs) flow mainly through power lines, earthed transformers and earth itself. The near DC currents may cause half-cycle saturation of transformers, possibly causing relay misoperation, increased reactive power demand and damage to transformers. This paper describes a patented idea to make a transformer immune to GIC using compensation windings in each phase. A compensation winding has one third of the turns of the main winding it protects and the three windings are connected in series between neutral point and earth. Time simulations demonstrate that the principle is effective for single-phase transformers, which is the transformer type most sensitive to GIC. It is also shown that the function is affected... (More)
- Geomagnetically induced currents (GICs) flow mainly through power lines, earthed transformers and earth itself. The near DC currents may cause half-cycle saturation of transformers, possibly causing relay misoperation, increased reactive power demand and damage to transformers. This paper describes a patented idea to make a transformer immune to GIC using compensation windings in each phase. A compensation winding has one third of the turns of the main winding it protects and the three windings are connected in series between neutral point and earth. Time simulations demonstrate that the principle is effective for single-phase transformers, which is the transformer type most sensitive to GIC. It is also shown that the function is affected neither by active and reactive load current nor by high GIC levels. GIC immunity is of particular interest for key transformers, as in large power plants, at the power system periphery, where GIC levels are in general higher. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4388326
- author
- Samuelsson, Olof LU
- organization
- publishing date
- 2013
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- compensation geomagnetism power transformers transformer windings
- host publication
- Power and Energy Society General Meeting (PES), 2013 IEEE
- pages
- 5 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- IEEE Power & Energy Society General Meeting, 2013
- conference location
- Vancouver, Canada
- conference dates
- 2013-06-21 - 2013-07-25
- external identifiers
-
- wos:000331874302004
- scopus:84893192243
- ISSN
- 1944-9925
- DOI
- 10.1109/PESMG.2013.6672596
- language
- English
- LU publication?
- yes
- id
- b45fbc9f-b5ac-447b-b041-24763978030f (old id 4388326)
- date added to LUP
- 2016-04-01 14:53:25
- date last changed
- 2022-01-28 02:59:03
@inproceedings{b45fbc9f-b5ac-447b-b041-24763978030f, abstract = {{Geomagnetically induced currents (GICs) flow mainly through power lines, earthed transformers and earth itself. The near DC currents may cause half-cycle saturation of transformers, possibly causing relay misoperation, increased reactive power demand and damage to transformers. This paper describes a patented idea to make a transformer immune to GIC using compensation windings in each phase. A compensation winding has one third of the turns of the main winding it protects and the three windings are connected in series between neutral point and earth. Time simulations demonstrate that the principle is effective for single-phase transformers, which is the transformer type most sensitive to GIC. It is also shown that the function is affected neither by active and reactive load current nor by high GIC levels. GIC immunity is of particular interest for key transformers, as in large power plants, at the power system periphery, where GIC levels are in general higher.}}, author = {{Samuelsson, Olof}}, booktitle = {{Power and Energy Society General Meeting (PES), 2013 IEEE}}, issn = {{1944-9925}}, keywords = {{compensation geomagnetism power transformers transformer windings}}, language = {{eng}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, title = {{Power Transformer Immune to Geomagnetically Induced Currents}}, url = {{http://dx.doi.org/10.1109/PESMG.2013.6672596}}, doi = {{10.1109/PESMG.2013.6672596}}, year = {{2013}}, }