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P. Karimifard, G. Gharehpetian (2008)
A new algorithm for localization of radial deformation and determination of deformation extent in transformer windingsElectric Power Systems Research, 78
P. Nirgude, D. Ashokraju, A. Rajkumar, B. Singh (2008)
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E. Rahimpour, J. Christian, K. Feser, H. Mohseni (2002)
Transfer Function Method to Diagnose Axial Displacement and Radial Deformation of Transformer WindingIEEE Power Engineering Review, 22
P. Karimifard, G. Gharehpetian, S. Tenbohlen (2009)
Localization of winding radial deformation and determination of deformation extent using vector fitting‐based estimated transfer functionEuropean Transactions on Electrical Power, 19
M. Bigdeli, M. Vakilian, E. Rahimpour (2011)
A New Method for Detection and Evaluation of Winding Mechanical Faults in Transformer through Transfer Function MeasurementsAdvances in Electrical and Computer Engineering, 11
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J. Christian, K. Feser (2004)
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Arvind Singh, F. Castellanos, J. Martí, K. Srivastava (2009)
A comparison of trans-admittance and characteristic impedance as metrics for detection of winding displacements in power transformersElectric Power Systems Research, 79
E. Rahimpour (2003)
Transfer Function Method to Diagnose Axial Displacement and Radial Deformation of Transformer WindingIEEE Transactions on Power Delivery, 18
P. Karimifard, G. Gharehpetian, S. Tenbohlen (2008)
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Comparison of transfer functions using estimated rational functions to detect winding mechanical faults in transformers As it is found in the related published literatures, the transfer function (TF) evaluation method is the most feasible method for detection of winding mechanical faults in transformers. Therefore, investigation of an accurate method for evaluation of the TFs is very important. This paper presents three new indices to compare the transformer TFs and consequently to detect the winding mechanical faults. These indices are based on estimated rational functions. To develop the method, the necessary measurements are carried out on a 1.3 MVA transformer winding, under intact condition, as well as different fault conditions (axial displacement of winding). The obtained results demonstrate the high potential of proposed method in comparison with two other well-known indices. Additionally, two important methods for describing TFs by rational functions are studied and compared in this paper.
Archives of Electrical Engineering – de Gruyter
Published: Jan 1, 2012
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