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Analysis of winding failures in HVDC converter transformers

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3 Author(s)
W. McDermid ; Manitoba Hydro, Winnipeg, Man., Canada ; A. Glodjo ; J. C. Bromley

In spite of periodic off-line electrical tests and on-line gas-in-oil analysis, three HVDC converter transformers have failed within a 12-month period. The possible causes of failure are reviewed together with changes in maintenance, monitoring and system operation that might prolong the life of similar transformers

Published in:

Electrical Insulation Conference and Electrical Manufacturing & Coil Winding Conference, 1999. Proceedings

Date of Conference: