Multifractal analysis on polarisation and depolarisation current of the transformer insulation

Author

Jadav, Raj B. ; Saha, Tapan K. ; Ekanayake, Chandima

Author_Institution

Sch. of ITEE, Univ. of Queensland, Brisbane, QLD, Australia

fYear

2012

fDate

26-29 Sept. 2012

Firstpage

1

Lastpage

6

Abstract

In this paper multifractal nature of polarisation (pol) and depolarisation (depol) current of a transformer insulation is identified and shown using a multifractal spectra. Multifractal analysis is carried out on pol and depol current of oil-impregnated pressboard samples of different moisture contents. Multifractal analysis is also carried out for pol and depol current of a transformer before and after oil reclamation. It is shown using multifractal spectra that pol and depol current of transformer insulation are fractal and scales with time. The sandbox method is used in this work to determine multifractal spectrum of pol and depol current for the moment order q = -10 to q = 10, and application of sandbox method to determine multifractal spectrum of pol and depol current is demonstrated.

Keywords

fractals; polarisation; transformer oil; depol current; depolarisation current; moisture contents; multifractal analysis; multifractal nature; multifractal spectrum; oil-impregnated pressboard; pol current; polarisation current; sandbox method; transformer insulation; Current measurement; Fractals; Moisture; Oil insulation; Power transformer insulation; Voltage measurement; Depolarisation current; Insulation; PDC; Polarisation; Transformer; fractal; multifractal; sandbox method;

fLanguage

English

Publisher

ieee

Conference_Titel

Universities Power Engineering Conference (AUPEC), 2012 22nd Australasian

Conference_Location

Bali

Print_ISBN

978-1-4673-2933-0

Type

conf

Filename

6360247