Title :
Power transformer monitoring using UHF sensors: site trials
Author :
Judd, M.D. ; Cleary, G.P. ; Bennoch, C.J. ; Pearson, J.S. ; Breckenridge, T.
Author_Institution :
Inst. for Energy & Environ., Strathclyde Univ., Glasgow, UK
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 UHF method could prove very effective for transformer testing and online PD monitoring
Keywords :
UHF devices; insulation testing; monitoring; partial discharge measurement; power transformer insulation; power transformer testing; transformer oil; 1000 MVA; UHF sensors; UHF test equipment; discharge signals analysis; discharge sources; insulation breakdown testing; internal discharges detection; oil-filled transformer; online PD monitoring; phase-resolved form signals; power transformer monitoring; site trials; time-of-flight measurements; transformer testing; Fault location; Frequency; Information analysis; Monitoring; Oil insulation; Phase measurement; Power transformers; Signal analysis; Test equipment; Testing;
Conference_Titel :
Electrical Insulation, 2002. Conference Record of the 2002 IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-7337-5
DOI :
10.1109/ELINSL.2002.995899
