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Research Article |

Effect of Test Cable Termination on Frequency Response of Transformer Winding

Author(s): Mayur V. Gojiya1* and Dr. Ketan P. Badgujar2

Published In : International Journal of Electrical and Electronics Research (IJEER)        Volume 11, Issue 1

Publisher : FOREX Publication

Published : 25 March 2023

e-ISSN : 2347-470X

Page(s) : 162-168

DOI: https://doi.org/10.37391/IJEER.110123

Abstract

Sweep Frequency Response Analysis (SFRA) method is the most powerful tool to predict the condition of transformer winding. The reliable measurement of frequency response is equally important as its interpretation. A few standards (IEEE std. C57.149-2012, IEC 60076, the Chinese Electrical Power Industry Standard ICS27.100.F24-2005) & much research work have been published, stating dos & don’ts while measuring the frequency response of transformer winding. In this paper, an attempt is made to introduce an additional factor affecting frequency response, while doing measurements. Here, the effect of test cable termination at transformer winding terminals, to prevent signal reflection, on frequency response is presented. A possible way to select suitable value/s of terminating resistance that can correct frequency response is also proposed.

Keywords: Sweep Frequency Response Analysis (SFRA), Signal Reflection, Terminating Resistance, Characteristic Impedance, Reflection co-efficient




Mayur V. Gojiya*, Research Scholar, Electrical Engineering Department, Gujarat Technological University, Ahmedabad, India; Email: mayur.gojiya010@gmail.com

Dr. Ketan P. Badgujar, Professor, Electrical Engineering Department, Gujarat Technological University, Ahmedabad, India; Email: dr.ketanbadgujar@gmail.com

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Mayur V. Gojiya and Dr. Ketan P. Badgujar (2023), Effect of Test Cable Termination on Frequency Response of Transformer Winding. IJEER 11(1), 162-168. DOI: 10.37391/IJEER.110123.