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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Power transformer monitoring using UHF sensors : site trials

Judd, M.D. and Cleary, G.P. and Bennoch, C.J. and Pearson, J.S. and Breckenridge, T. (2002) Power transformer monitoring using UHF sensors : site trials. In: 2002 IEEE International Symposium on Electrical Insulation, 2002-04-07 - 2002-04-10.

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Abstract

Sensors operating in the ultra-high frequency (UHF) band have been used to detect internal discharges during site testing of a 1000 MVA oil-filled transformer. The transformer was operated at voltages exceeding normal levels by up to 15%. Two discharge sources were detected at both sensors using UHF test equipment. Discharge signals are analyzed in phase-resolved form and time-of-flight measurements are used to provide further information regarding their origin. The results indicate that the URF method could prove very effective for transformer testing and on-line PD monitoring.