A new approach to the study of surface discharge on the oil-pressboard interface
A new approach to the study of surface discharge on the oil-pressboard interface
The materials used as the dielectric media of choice in large transformers continue to be a combination of pressboard and mineral oil. These materials offer a cost effective solution and are backed by a historical knowledge base of performance data and lifetime characteristics. A proven method to prevent inter-phase flashover is to use successive layers of pressboard and oil gaps. However, a number of failures in the field have been attributed to surface discharge or creeping discharge over the pressboard surface. This paper reports on an experiment to study surface discharge on pressboard in oil. A new technique for the generation of repeatable surface discharge is outlined. The paper explains the differences between surface tracking, and surface flash-over. The results indicate that the tracking is the result of surface discharge and that surface discharge and surface flash-over are two distinct phenomena.
978-1-4244-1586-1
186-189
Mitchinson, P M
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Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Chen, George
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Jarman, P N
8e6247bc-f98c-4dac-b150-b7213f2184d5
30 June 2008
Mitchinson, P M
9de2f4d4-38fb-466b-94c6-c4390a6b2aa8
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Jarman, P N
8e6247bc-f98c-4dac-b150-b7213f2184d5
Mitchinson, P M, Lewin, P L, Chen, George and Jarman, P N
(2008)
A new approach to the study of surface discharge on the oil-pressboard interface.
16th IEEE International Conference on Dielectric Liquids, ICDL 2008, Poitiers, France.
30 Jun - 03 Jul 2008.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
The materials used as the dielectric media of choice in large transformers continue to be a combination of pressboard and mineral oil. These materials offer a cost effective solution and are backed by a historical knowledge base of performance data and lifetime characteristics. A proven method to prevent inter-phase flashover is to use successive layers of pressboard and oil gaps. However, a number of failures in the field have been attributed to surface discharge or creeping discharge over the pressboard surface. This paper reports on an experiment to study surface discharge on pressboard in oil. A new technique for the generation of repeatable surface discharge is outlined. The paper explains the differences between surface tracking, and surface flash-over. The results indicate that the tracking is the result of surface discharge and that surface discharge and surface flash-over are two distinct phenomena.
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Published date: 30 June 2008
Additional Information:
Event Dates: 30 June - 3 July, 2008
Venue - Dates:
16th IEEE International Conference on Dielectric Liquids, ICDL 2008, Poitiers, France, 2008-06-30 - 2008-07-03
Organisations:
Electronics & Computer Science, EEE
Identifiers
Local EPrints ID: 266067
URI: http://eprints.soton.ac.uk/id/eprint/266067
ISBN: 978-1-4244-1586-1
PURE UUID: d68fd2e4-516f-4fd9-886e-ce8d9e05b125
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Date deposited: 07 Jul 2008 12:52
Last modified: 15 Mar 2024 02:43
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Contributors
Author:
P M Mitchinson
Author:
P L Lewin
Author:
George Chen
Author:
P N Jarman
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