Noninvasive ageing assessment by means of polarization and depolarization currents analysis and its correlation with moisture content for power transformer life management

Author

Bassi, W.

fYear

2004

fDate

8-11 Nov. 2004

Firstpage

611

Lastpage

616

Abstract

This paper presents the Brazilian experience on the application of a noninvasive technique based on the dielectric response using the polarization and depolarization currents analysis and its correlation with moisture contents to have an assessment of ageing processes in power transformers. The theory, the procedure, the basis of analysis, the interpretation of measurements and field measurement results are given. The dielectric response analysis and its derived none-invasive moisture and ageing assessment procedures using the PDC-analysis (PDC=polarization, depolarization current-analysis) are discussed in detail.

Keywords

ageing; life testing; polarisation; power transformer testing; Brazil; condition assessment; depolarization currents analysis; dielectric response; noninvasive ageing assessment; polarization currents analysis; power transformer life management; transformer ageing; Aging; Circuit faults; Condition monitoring; Content management; Dielectric measurements; Energy management; Moisture; Polarization; Power transformer insulation; Power transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exposition: Latin America, 2004 IEEE/PES

Print_ISBN

0-7803-8775-9

Type

conf

DOI

10.1109/TDC.2004.1432449

Filename

1432449