Application of polarization based measurement techniques for diagnosis of field transformers

Author

Ekanayake, C. ; Saha, T.K. ; Ma, H. ; Allan, D.

Author_Institution

Sch. of ITEE, Univ. of Queensland, St. Lucia, QLD, Australia

fYear

2010

fDate

25-29 July 2010

Firstpage

1

Lastpage

8

Abstract

This paper presents both quantitative and qualitative analysis of several polarization based measurements, which include frequency domain spectroscopy (FDS) and polarization depolarization current (PDC) measurements on four different field transformers. The X-Y model and the RC circuit model are mainly used in the analyses. In this study sequential FDS/PDC measurements on the same unit are used to identify the progressive change of the insulation condition. Influence of oil conductivity and geometrical parameters on the estimates from FDS response is shown in detail. Based on this study a simple technique to improve the reliability from FDS measurement is discussed. Influence of the oil refurbishment process on polarization based measurements is also presented and discussed.

Keywords

chemical analysis; polarisation; power transformer insulation; reliability; RC circuit model; field transformer diagnosis; frequency domain spectroscopy; oil refurbishment process; polarization based measurement techniques; polarization depolarization current; qualitative analysis; quantitative analysis; Frequency domain spectroscopy; insulation ageing; insulation response modeling; moisture estimation; oil conductivity; polarization depolarization current; transformer insulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting, 2010 IEEE

Conference_Location

Minneapolis, MN

ISSN

1944-9925

Print_ISBN

978-1-4244-6549-1

Electronic_ISBN

1944-9925

Type

conf

DOI

10.1109/PES.2010.5589446

Filename

5589446