The missing link – the role of space charge in
polymeric insulation lifetime
The missing link – the role of space charge in
polymeric insulation lifetime
Polymeric insulation in power equipment experiences
degradation and ageing under service conditions. The
determination of remaining life plays a key part in the asset management. This requires an ageing indicator which can be used to monitor the status of the insulation. In this paper a simple model based on trap creation has been proposed and a concept of critical trap density can be used to describe the lifetime of the insulation. Assuming the power law relationship between the trap creation and the electric field, the empirical inverse power law can be derived. This allows one to relate the physical mechanisms and ageing processes (trap generation). Since the number of traps and energy depth of traps have direct influence on charge dynamics, using the two energy levels of trap depth model developed previously it is possible to estimate the trap density through changes in space charge dynamics. Further work is necessary to establish the direct relationship between trap density and the remaining life of the polymeric insulation.
978-4-88686-086-6
12-16
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Chen, George
(2014)
The missing link – the role of space charge in
polymeric insulation lifetime.
ISEIM2014: International Symposium on Electrical Insulating Materials, Niigata City, Japan.
01 - 05 Jun 2014.
.
Record type:
Conference or Workshop Item
(Other)
Abstract
Polymeric insulation in power equipment experiences
degradation and ageing under service conditions. The
determination of remaining life plays a key part in the asset management. This requires an ageing indicator which can be used to monitor the status of the insulation. In this paper a simple model based on trap creation has been proposed and a concept of critical trap density can be used to describe the lifetime of the insulation. Assuming the power law relationship between the trap creation and the electric field, the empirical inverse power law can be derived. This allows one to relate the physical mechanisms and ageing processes (trap generation). Since the number of traps and energy depth of traps have direct influence on charge dynamics, using the two energy levels of trap depth model developed previously it is possible to estimate the trap density through changes in space charge dynamics. Further work is necessary to establish the direct relationship between trap density and the remaining life of the polymeric insulation.
Text
Z02.pdf
- Accepted Manuscript
More information
e-pub ahead of print date: 1 June 2014
Venue - Dates:
ISEIM2014: International Symposium on Electrical Insulating Materials, Niigata City, Japan, 2014-06-01 - 2014-06-05
Organisations:
EEE
Identifiers
Local EPrints ID: 373675
URI: http://eprints.soton.ac.uk/id/eprint/373675
ISBN: 978-4-88686-086-6
PURE UUID: 26b9a291-04d2-4d8a-99fb-730bd169da5c
Catalogue record
Date deposited: 27 Jan 2015 16:59
Last modified: 14 Mar 2024 18:55
Export record
Contributors
Author:
George Chen
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics