@inproceedings{407ff15bee8f44b3951ce72f1f9f2257,
title = "Design Considerations for K-Rated Transformers",
abstract = "The presence of harmonic currents due to the switching action of inverters has spread the realization of the prospective rapid depletion of the transformer's intended lifetime owing to increased losses and temperature rise. With the prospect of reduced transformer service lifetime under harmonic conditions, there is a growing interest by manufacturers to explore design procedures that enables transformers to operate reliably under harmonic conditions. The current work examines K-rated transformers with regards to harmonic indexes in particularly with respect to K-Factor, Harmonic loss factor (HLF) and Factor K for derating the transformer. The transformer considered in this study has a rated 630kVA. Based on a supplied harmonic current spectrum, a comparative study is carried out to calculate the additional winding Eddy losses using the K-Factor and HLF methods. The study reveals that when delivering this harmonic spectrum, the investigated unit must be de-rated to 86.6% of its nominal power rating.",
keywords = "Factor K, Harmonic currents, Harmonic loss factor (HLF), K-Factor, Transformer",
author = "Thango, {B. A.} and Sikhosana, {L. S.} and Nnachi, {A. F.} and Jordaan, {J. A.} and Akumu, {A. O.}",
note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 International Conference on Electrical, Computer, and Energy Technologies, ICECET 2021 ; Conference date: 09-12-2021 Through 10-12-2021",
year = "2021",
doi = "10.1109/ICECET52533.2021.9698635",
language = "English",
series = "International Conference on Electrical, Computer, and Energy Technologies, ICECET 2021",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "International Conference on Electrical, Computer, and Energy Technologies, ICECET 2021",
address = "United States",
}