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Apparent Mobility and its Relationship with Ageing in Polymeric Insulation Materials (invited talk)

Record type: Conference or Workshop Item (Other)

Apparent mobility obtained from space charge decay measurement has been recently used as an ageing marker to assess degradation of the insulation materials. The apparent mobility of charge carriers becomes slower after experiencing electrical ageing. In this paper, we have measured space charge decay in polymeric insulation material using the pulsed electroacoustic technique and studied apparent mobility features in a wide range of the applied fields and poling times. It has been found that the increase in the applied field and poling time produces more deep trapped charges, leading to a decrease in apparent mobility with time. For a specific time, the detrapping process is dominated by the charges of specific trap levels, resulting in a time dependent apparent mobility. In addition it has been found a sudden increase in apparent mobility at high fields, indicating that a precaution has to be taken when assessing the ageing using the method.

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Citation

Chen, George and Van Nguyen, T (2008) Apparent Mobility and its Relationship with Ageing in Polymeric Insulation Materials (invited talk) At 2008 International Conference on Condition Monitoring and Diagnosis, China. 21 - 24 Apr 2008. , pp. 633-637.

More information

Published date: 21 April 2008
Additional Information: Event Dates: April 21 - 24, 2008
Venue - Dates: 2008 International Conference on Condition Monitoring and Diagnosis, China, 2008-04-21 - 2008-04-24
Keywords: space charge, apparent mobility, polymeric insulation, electrical ageing, high electric field, trapping characteristic.
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 265620
URI: http://eprints.soton.ac.uk/id/eprint/265620
ISBN: 978-1-4244-1621-9
PURE UUID: 443379db-f576-4679-9a9b-c62265df5e3e

Catalogue record

Date deposited: 28 Apr 2008 08:46
Last modified: 18 Jul 2017 07:25

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Contributors

Author: George Chen
Author: T Van Nguyen

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