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Impact of mechanical deformation on space charge in XLPE

Impact of mechanical deformation on space charge in XLPE
Impact of mechanical deformation on space charge in XLPE
In this paper we report the effect of mechanical deformation on space charge dynamics in crosslinked polyethylene. Thin films were peeled from a 66 kV commercial XLPE cable. Space charge measurements under dc electric fields have been monitored using the pulsed electroacoustic (PEA) technique. It has been found that charge dynamics in deformed XLPE are different from that from undeformed XLPE at lower voltages. At low applied electric field, space charge is dominated by heterocharge in the deformed XLPE while homocharge governs charge formation in undeformed XLPE. However, at high electric field, there is no significant difference between them. Space charge is dominated by homocharge in both deformed and undeformed XLPE. The results indicated that through deformation, molecular chains rearrange so small molecules such as crosslinking by-products, initially being trapped, can be released. Under the influence of the applied electric field they can be ionised to form heterocharge in the sample.
Mechanical deformation, space charge, XLPE power cables
1-4244-0750-8
510-513
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Kamaruzzaman, M. R.
11bdafbc-3d38-45c0-a68c-6387d8afa84c
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Kamaruzzaman, M. R.
11bdafbc-3d38-45c0-a68c-6387d8afa84c

Chen, G. and Kamaruzzaman, M. R. (2007) Impact of mechanical deformation on space charge in XLPE. 2007 IEEE International Conference on Solid Dielectrics, United Kingdom. 08 - 13 Jul 2007. pp. 510-513 .

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper we report the effect of mechanical deformation on space charge dynamics in crosslinked polyethylene. Thin films were peeled from a 66 kV commercial XLPE cable. Space charge measurements under dc electric fields have been monitored using the pulsed electroacoustic (PEA) technique. It has been found that charge dynamics in deformed XLPE are different from that from undeformed XLPE at lower voltages. At low applied electric field, space charge is dominated by heterocharge in the deformed XLPE while homocharge governs charge formation in undeformed XLPE. However, at high electric field, there is no significant difference between them. Space charge is dominated by homocharge in both deformed and undeformed XLPE. The results indicated that through deformation, molecular chains rearrange so small molecules such as crosslinking by-products, initially being trapped, can be released. Under the influence of the applied electric field they can be ionised to form heterocharge in the sample.

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More information

Published date: 2007
Additional Information: Event Dates: 8th -- 13th July 2007
Venue - Dates: 2007 IEEE International Conference on Solid Dielectrics, United Kingdom, 2007-07-08 - 2007-07-13
Keywords: Mechanical deformation, space charge, XLPE power cables
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 264319
URI: https://eprints.soton.ac.uk/id/eprint/264319
ISBN: 1-4244-0750-8
PURE UUID: 3a601678-5aaf-45b4-87e6-af13f4b0da34

Catalogue record

Date deposited: 17 Jul 2007
Last modified: 18 Jul 2017 07:37

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