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Power transformers winding fault diagnosis by the on-load exciting current exte...
Oliveira, L. M. R.; Cardoso, A. J. Marques; Cruz, S. M. A.This paper presents the application of the on-load exciting current Extended Park's Vector Approach to diagnose incipient turn-to-turn winding faults in operating power transformers. Experimental and simulation test results demonstrate the effectiveness of the proposed technique, which is based on the spectral analysis of the AC component of the on-load exciting current Park's Vector modulus.
Inter-turn stator winding fault diagnosis in three-phase induction motors, by P...
Cardoso, A. J. Marques; Cruz, S. M. A.; Fonseca, D. S. B.The subject of on-line detection and location of inter-turn short circuits in the stator windings of three-phase induction motors is discussed, and a noninvasive approach, based on the computer-aided monitoring of the stator current Park's vector, is introduced. Experimental results, obtained by using a special fault producing test rig, demonstrate the effectiveness of the proposed technique, for detecting inte...
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