An investigation of discharges in oil insulation using UHF PD detection

Author

Cleary, G.P. ; Judd, M.D.

Author_Institution

Inst. for Energy & Environ., Strathclyde Univ., Glasgow, UK

fYear

2002

fDate

2002

Firstpage

341

Lastpage

344

Abstract

In this paper, partial discharge (PD) is generated using a range of electrode configurations in an oil insulated system. High voltage AC at 50 Hz is applied to each test configuration and the PD activity is recorded using an ultra high frequency (UHF) monitoring system. The PD signals are analysed in a phase resolved form, from which the corresponding statistical distributions are determined. The results indicate that different defect types can be distinguished on the basis of their phase-resolved patterns measured at UHF. Possible physical causes for the discharge patterns are discussed.

Keywords

UHF measurement; insulation testing; partial discharge measurement; power transformer insulation; power transformer testing; signal processing; transformer oil; 50 Hz; PD activity recording; PD signals analysis; UHF PD detection; defect types; discharge patterns; electrode configurations; high voltage AC; oil insulated system; oil insulation discharges; phase resolved form; phase-resolved patterns; power transformer; statistical distributions; ultra high frequency monitoring system; Electrodes; Frequency; Monitoring; Oil insulation; Partial discharges; Petroleum; Signal analysis; Signal resolution; System testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Dielectric Liquids, 2002. ICDL 2002. Proceedings of 2002 IEEE 14th International Conference on

Print_ISBN

0-7803-7350-2

Type

conf

DOI

10.1109/ICDL.2002.1022764

Filename

1022764