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The Influence of Material Modification and Residues on Space Charge Accumulation in XLPE for DC Power Cable Application

The Influence of Material Modification and Residues on Space Charge Accumulation in XLPE for DC Power Cable Application
The Influence of Material Modification and Residues on Space Charge Accumulation in XLPE for DC Power Cable Application
The effects of material modification and cross-linking by-products (residues) quantity on space charge accumulation and decay in XLPE have been investigated using the pulsed electro-acoustic technique. The threshold stress for space charge generation during voltage-ramping was found to show considerable variation and to depend upon the material and the amount of residue present. However, the modified XLPE material was found to exhibit a higher threshold for space charge accumulation than the reference XLPE whatever the conditions. De-gassed samples were found to exhibit the highest threshold stress, with that of the modified de-gassed XLPE accumulating no space charge at all even after 24 hours stressing at 70kV. In general heterocharge regions were formed when the residues were present and homocharge or no charge was formed when the residues were removed by degassing. Differences were also found in the space charge decay following short-circuit (volts-off), with the decay of heterocharge being rapid, whereas that of homocharge was slow. A tentative explanation is offered to explain these features.
Space charge, Cross-linking by-products, XLPE and PEA
1070-9878
53-64
Fu, M
22d474b8-9c19-4ccb-9e64-6087ffe0941d
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Disaado, L A
009f9148-7b82-4051-8d9f-830a82e6e8ba
Fothergill, J C
f9675969-e8e2-43b9-883f-b4b0fbf68582
Fu, M
22d474b8-9c19-4ccb-9e64-6087ffe0941d
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Disaado, L A
009f9148-7b82-4051-8d9f-830a82e6e8ba
Fothergill, J C
f9675969-e8e2-43b9-883f-b4b0fbf68582

Fu, M, Chen, G, Disaado, L A and Fothergill, J C (2007) The Influence of Material Modification and Residues on Space Charge Accumulation in XLPE for DC Power Cable Application. IEEE Transactions on Dielectrics & Electrical Insulation, 14 (1), 53-64.

Record type: Article

Abstract

The effects of material modification and cross-linking by-products (residues) quantity on space charge accumulation and decay in XLPE have been investigated using the pulsed electro-acoustic technique. The threshold stress for space charge generation during voltage-ramping was found to show considerable variation and to depend upon the material and the amount of residue present. However, the modified XLPE material was found to exhibit a higher threshold for space charge accumulation than the reference XLPE whatever the conditions. De-gassed samples were found to exhibit the highest threshold stress, with that of the modified de-gassed XLPE accumulating no space charge at all even after 24 hours stressing at 70kV. In general heterocharge regions were formed when the residues were present and homocharge or no charge was formed when the residues were removed by degassing. Differences were also found in the space charge decay following short-circuit (volts-off), with the decay of heterocharge being rapid, whereas that of homocharge was slow. A tentative explanation is offered to explain these features.

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More information

Published date: February 2007
Keywords: Space charge, Cross-linking by-products, XLPE and PEA
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 263476
URI: http://eprints.soton.ac.uk/id/eprint/263476
ISSN: 1070-9878
PURE UUID: 15459472-a7ac-4f80-bb20-53456024330d

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Date deposited: 18 Feb 2007
Last modified: 25 Mar 2020 17:45

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Contributors

Author: M Fu
Author: G Chen
Author: L A Disaado
Author: J C Fothergill

University divisions

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