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Comprehensive Study on Magnetization Current Harmonics of Power Transformers due to GICs
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
2013 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper studies the effect of DC magnetization of power transformers on injected harmonics to power systems. DC magnetization due to geomagnetically induced currents can saturate the core of a power transformer during a half cycle. It causes a very asymmetric, high value magnetization current that contains large harmonic components.

In this work, by using a three-dimensional finite element model, the effect of core type and DC current level on generated harmonics is investigated.

The results could help power system engineers to choose the proper types of power transformers and improve the protection aspects of the network.

 

Place, publisher, year, edition, pages
2013.
Keyword [en]
Geomagnetically induced currents, GIC, Power transformers, saturation, magnetization current, harmonic, FEM
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-138884OAI: oai:DiVA.org:kth-138884DiVA: diva2:681895
Conference
International Conference on Power Systems Transients (IPST2013) in Vancouver, Canada July 18-20, 2013.
Funder
StandUp
Note

QC 20140331

Available from: 2013-12-20 Created: 2013-12-20 Last updated: 2014-03-31Bibliographically approved

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