alexa SWEEP FREQUENCY RESPONSE ANALYSIS (SFRA) AN APPROACH T
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Open Access

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Research Article

SWEEP FREQUENCY RESPONSE ANALYSIS (SFRA) AN APPROACH TO DETECT HIDDEN TRANSFORMER FAULTS

AKSHAY A. PANDYA 1, DR.(PROF.) B.R.PAREKH 2
  1. Research Scholar @ SICART & Associate Professor, Department of Electrical Engineering, Birla Vishvakarma Mahavidyalaya Engineering College, Vallabh Vidyanagar, Gujarat, INDIA
  2. Professor & Head, Department of Electrical Engineering, Birla Vishvakarma Mahavidyalaya Engineering College, Vallabh Vidyanagar, Gujarat, INDIA
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Abstract

Sweep frequency response analysis is a major advance in transformer condition analysis. Frequency response is performed by applying a low voltage signal of varying frequencies to the transformer windings and measuring both the input and output signals. The ratio of these two signals gives the required response. This ratio is called the transfer function of the transformer from which both the magnitude and phase can be obtained. Changes in frequency response as measured by SFRA techniques may indicate a physical change inside the transformer, the cause of which then needs to be identified and investigated.

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