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A simulation model for transformer internal faults base for the study of protection and monitoring systems

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3 Author(s)
Bertrand, P. ; Merlin-Gerlin, Grenoble, France ; Devalland, A. ; Bastard, P.

The study of internal faults in transformers, i.e. the calculation of the fault current and its external detection (phase currents) as a function of the location and the amplitude of the fault, is of great interest. This situation has led the authors to manufacture a special, multiple output transformer. This device, designed on the basis of a 100 kVA MV/LV transformer, has enabled them to carry out numerous turn-to-turn and turn-to-earth short-circuits. In association with these tests, they have developed a digital model of the transformer, validated by the actual measurements. This model, when applied to a HV network transformer, enables the efficiency of the usual protection devices to be examined, in particular that of the transformer differential protection

Published in:

Electricity Distribution, 1993. CIRED. 12th International Conference on

Date of Conference:

17-21 May 1993

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