Contribution à l’étude et à l’analyse du régime transitoire dans les transformateurs de puissance : Cas du courant d’appel

Abstract

The transformer is an essential component in power system in its transmission or distribution part. This thesis is part of the project for studies of the effects of saturation on power transformers. The focus is on the low frequency region where the saturation is a challenge. This work presents a method to calculate the saturation curve of a power transformer. A description of the transformer models existing in the EMTP software has been done. These models can be used in transient simulations to predict the switching transients and inrush current. When the transformer is energized, a high inrush current occurs due to the saturation, which leads to reduce the power quality, and the life of transformer.