Elimination of inrush current in parallel transformers by sequential phase energization

Basu, K. P. and Asghar, Ali and Morris, Stella (2007) Elimination of inrush current in parallel transformers by sequential phase energization. IEICE Electronics Express, 4 (5). pp. 147-152. ISSN 1349-2543

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Official URL: http://dx.doi.org/10.1587/elex.4.147

Abstract

Production of very high inrush currents in transformers during energization may create deep voltage sag causing malfunction to electronic and other loads. In high voltage power system star-delta transformers are generally switched in, one by one, producing inrush currents each time. The inrush current may be reduced by sequential phase energization of each transformer with neutral resistors. This paper suggests that sequential phase energization should be carried out on the first transformer only after paralleling the delta secondary of all the transformers. This procedure eliminates inrush currents in all the remaining transformers without too much increase in the inrush of the first transformer.

Item Type: Article
Subjects: T Technology > T Technology (General)
Q Science > QA Mathematics > QA75.5-76.95 Electronic computers. Computer science
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 29 Sep 2011 03:21
Last Modified: 29 Sep 2011 03:21
URI: http://shdl.mmu.edu.my/id/eprint/3083

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