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Dynamic modeling of three-phase asymmetric power transformers with magnetic hysteresis / Moses, P. S. in IEEE transactions on energy conversion, Vol. 25, N° 4 (Décembre 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25, N° 4 (Décembre 2010) . - pp. 1040 - 1047 Titre : Dynamic modeling of three-phase asymmetric power transformers with magnetic hysteresis : no-load and inrush conditions Type de document : texte imprimé Auteurs : Moses, P. S., Auteur ; Masoum, M. A. S., Auteur ; Toliyat, H. A., Auteur Année de publication : 2011 Article en page(s) : pp. 1040 - 1047 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Ferroresonance;  magnetic  circuits;  magnetic  hysteresis;  nonlinear  functions;  power  transformers;  time-domain  analysis Résumé : A new dynamic model of a three-phase three-leg transformer for steady-state and transient operating conditions is proposed in this paper. With very few exceptions, the existing models oversimplify the magnetic interactions in multileg core topologies and employ single-value nonlinear functions for modeling core nonlinearities. Unfortunately, this does not provide sufficient accuracy for a wide range of dynamic disturbances such as dc bias, ferroresonance, and inrush. For this purpose, a new time-domain model based on magnetic-circuit theory is developed to include dynamic-hysteresis behavior (major and minor loops) in asymmetric three-leg core topologies. Furthermore, a new analysis is performed to study the impacts of hysteresis on no-load and transient inrush current behavior in three-phase transformers. Simulation results have been successfully compared with measurements to verify the accuracy of the proposed model. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5575408&sortType%3Das [...] [article] Dynamic modeling of three-phase asymmetric power transformers with magnetic hysteresis : no-load and inrush conditions [texte imprimé] / Moses, P. S., Auteur ; Masoum, M. A. S., Auteur ; Toliyat, H. A., Auteur . - 2011 . - pp. 1040 - 1047. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 4 (Décembre 2010) . - pp. 1040 - 1047 Mots-clés : Ferroresonance;  magnetic  circuits;  magnetic  hysteresis;  nonlinear  functions;  power  transformers;  time-domain  analysis Résumé : A new dynamic model of a three-phase three-leg transformer for steady-state and transient operating conditions is proposed in this paper. With very few exceptions, the existing models oversimplify the magnetic interactions in multileg core topologies and employ single-value nonlinear functions for modeling core nonlinearities. Unfortunately, this does not provide sufficient accuracy for a wide range of dynamic disturbances such as dc bias, ferroresonance, and inrush. For this purpose, a new time-domain model based on magnetic-circuit theory is developed to include dynamic-hysteresis behavior (major and minor loops) in asymmetric three-leg core topologies. Furthermore, a new analysis is performed to study the impacts of hysteresis on no-load and transient inrush current behavior in three-phase transformers. Simulation results have been successfully compared with measurements to verify the accuracy of the proposed model. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5575408&sortType%3Das [...]