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Applying UHF partial discharge detection to power transformers

Judd, M.D. and Cleary, G.P. and Bennoch, C.J.J. (2002) Applying UHF partial discharge detection to power transformers. IEEE Power Engineering Review, 22 (8). pp. 57-59. ISSN 0272-1724

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Abstract

A new technique for analyzing partial discharge (PD) signals based on ultra-high frequency (UHF) measurements is presented, using results from site tests. Signals from simultaneously active discharge sources can be mapped according to their point of origin in a manner that will simplify the interpretation of phase-resolved discharge patterns. The scheme has the potential to allow automated location and tracking of multiple discharge sources in power transformers and other metal-clad high-voltage plants.