Title :
Investigations on the effect of dynamic fault on impulse fault current waveforms of transformer
Author :
Rajamani, P. ; Dey, D. ; Chakravorti, S.
Author_Institution :
Dept. of Electr. Eng., Jadavpur Univ., Kolkata, India
Abstract :
A novel approach to investigate the changes in the temporal nature of impulse fault current in the transformer winding due to dynamic insulation failures has been proposed. Non-linear bilateral fault simulator circuit is developed and connected in analog model of 3 MVA transformer to simulate static and dynamic faults. The features extracted from cross-correlation of faulted and no-fault impulse currents shows that the features are following some defined patterns. The concepts of cross-correlation based feature extraction and simulation of static and dynamic faults are explained.
Keywords :
fault currents; fault diagnosis; feature extraction; power transformer insulation; transformer windings; analog model; apparent power 3 MVA; cross-correlation based feature extraction; dynamic fault effect; dynamic fault simulation; dynamic insulation failures; impulse fault current waveforms; nonlinear bilateral fault simulator circuit; static fault simulation; transformer winding; Circuit faults; Circuit simulation; Dielectrics and electrical insulation; Fault currents; Fault diagnosis; Impulse testing; Oil insulation; Power transformer insulation; Power transformers; Windings; cross-correlation; dynamic fault simulator; dynamic insulation failure; impulse fault patterns;
Conference_Titel :
Power Systems, 2009. ICPS '09. International Conference on
Conference_Location :
Kharagpur
Print_ISBN :
978-1-4244-4330-7
Electronic_ISBN :
978-1-4244-4331-4
DOI :
10.1109/ICPWS.2009.5442779
