Simplified models of three-phase, five-limb transformer for studying GIC effects
Zirka, S.E.; Moroz, Y.I.; Elovaara, J; Lahtinen, M; Walling, RA; Hoidalen, Hans Kristian; Bonmann, D; Arturi, CM; Chiesa, Nicola
Journal article, Peer reviewed
Published version
Åpne
Permanent lenke
http://hdl.handle.net/11250/2607412Utgivelsesdato
2018Metadata
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- Institutt for elkraftteknikk [2412]
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Originalversjon
International Journal of Electrical Power & Energy Systems. 2018, 103 168-175. 10.1016/j.ijepes.2018.05.035Sammendrag
The paper describes capabilities of a topological model of three-phase, five-limb transformer to accurately represent its response when subjected to geomagnetically induced currents. The model is validated by close agreement of the predicted values and waveforms of the currents, voltages, and reactive power with those measured in tests performed on two 400 MVA transformers connected back-to-back and to the Fingrid power network. Results demonstrate the importance of incorporating the network representation and dispel some misconceptions about the influence of the hysteretic properties of the core and tank in modeling five-limb transformers.