Investigation of GIC effects on core losses in single phase power transformers
2011 (English)In: Archives of Electrical Engineering, ISSN 0004-0746, Vol. 60, no 1, 35-47 p.Article in journal (Refereed) Published
This paper presents a method for estimation of core losses in banks of single phase power transformers that are subjected to an injected DC current such as geomagnetically induced currents (GIC). The main procedure of the core loss calculation is to obtain a magnetic flux density waveform in both time and location by using a novel algorithm based on 3D FEM inside the core and then to calculate the loss distribution based on loss separation theory. Also, a simple and effective method is proposed for estimation of losses of asymmetric minor loops by using combination of symmetric loops. The effect of DC biasing on core losses in single phase power transformers is investigated and the sensitivity of core type and material is evaluated. the results shows that DC current biasing could increase core losses up to 40 percent or even more.
Place, publisher, year, edition, pages
2011. Vol. 60, no 1, 35-47 p.
GIC, Power Transformers, Core losses
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-71045DOI: 10.2478/v10171-011-0004-9ScopusID: 2-s2.0-79957508246OAI: oai:DiVA.org:kth-71045DiVA: diva2:486461
QC 201202062012-01-302012-01-302012-11-21Bibliographically approved