DocumentCode
2214465
Title
Advanced Applications of Polarisation / Depolarisation Current Analysis on Power Transformers
Author
Bhumiwat, S.A.
Author_Institution
Indep. High Voltage Diagnostics Consultant, Auckland
fYear
2008
fDate
9-12 June 2008
Firstpage
474
Lastpage
477
Abstract
One case study in this paper shows how to identify wet insulation system in an on-load tap changer (OLTC) by polarisation / depolarisation current (PDC) analysis. It emphasizes the importance of filling a new transformer with good oil having very low conductivity. The other two case studies on transformers without oil (before oil refilling) demonstrate how aging type of solid insulation can be identified by the PDC technique.
Keywords
ageing; current transformers; dielectric polarisation; power transformer insulation; aging type; dielectric polarisation response; on-load tap changer; polarisation-depolarisation current analysis; power transformers; solid insulation; wet insulation system; Aging; Conductivity; Filling; Oil insulation; On load tap changers; Petroleum; Polarization; Power transformer insulation; Power transformers; Solids;
fLanguage
English
Publisher
ieee
Conference_Titel
Electrical Insulation, 2008. ISEI 2008. Conference Record of the 2008 IEEE International Symposium on
Conference_Location
Vancouver, BC
ISSN
1089-084X
Print_ISBN
978-1-4244-2091-9
Electronic_ISBN
1089-084X
Type
conf
DOI
10.1109/ELINSL.2008.4570376
Filename
4570376
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