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

fYear

2002

fDate

7-10 Apr 2002

Firstpage

145

Lastpage

149

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2002. Conference Record of the 2002 IEEE International Symposium on

Conference_Location

Boston, MA

Print_ISBN

0-7803-7337-5

Type

conf

DOI

10.1109/ELINSL.2002.995899

Filename

995899