Insulation condition assessment of transformer bushings by means of polarisation/depolarisation current analysis

Author

Bhumiwat, Supatra A.

Author_Institution

KEA Consultant, Auckland, New Zealand

fYear

2004

fDate

19-22 Sept. 2004

Firstpage

500

Lastpage

503

Abstract

This paper presents some practical experience of polarisation/depolarisation current (PDC) analysis on a number of condenser bushings having three different insulation designs-oil impregnated paper (OIP), synthetic resin bonded paper (SRBP) and resin impregnated paper (RIP). It suggests methods for performing successful on-site measurement. The document contains PDC measurement results and evaluation results of main insulation C1 for each type of bushing. It proves that the sensitivity in detecting insulation aging of the PDC technique is better than the conventional 50 Hz test.

Keywords

ageing; bushings; condition monitoring; impregnated insulation; partial discharge measurement; polarisation; resins; transformer oil; 50 Hz; PDC measurement; condenser bushings; insulation aging; insulation condition assessment; insulation designs; oil impregnated paper; on-site measurement; polarisation-depolarisation current analysis; resin impregnated paper; synthetic resin bonded paper; transformer bushings; Bonding; Insulators; Moisture; Oil insulation; Petroleum; Polarization; Power transformer insulation; Power transformers; Resins; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2004. Conference Record of the 2004 IEEE International Symposium on

ISSN

1089-084X

Print_ISBN

0-7803-8447-4

Type

conf

DOI

10.1109/ELINSL.2004.1380664

Filename

1380664