Abstract
AbstractThis paper deals with the behaviour of the three phase three limb transformer (with or without tertiary winding) as well as the four limb transformer under unbalanced steady states in a YN/yn network. Technical and economical comparative analysis has been established among the different configurations of the transformers. The opportunity of the replacement of the four limb transformer, currently used in the Tunisian distribution network, by a three limb transformer equipped by a tertiary winding has been discussed. During the analysis, the example of a 20 KVA transformer with a tertiary winding and a fourth limb (which could be removed) has been tested. A satisfactory concurrent is obtained between theoretical and experimental results.
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