Effect of Cross-Linking on the Electrical Properties of LDPE and its Lightning Impulse Ageing Characteristics
Effect of Cross-Linking on the Electrical Properties of LDPE and its Lightning Impulse Ageing Characteristics
Cross-linked polyethylene (XLPE) is commonly used within high voltage cable insulation. It has improved thermal and mechanical resistance compared to normal low density polyethylene (LDPE). However, the cross-linking process may also vary the electrical characteristics of the material. This paper investigates changes in electrical properties of one type of LDPE before and after cross-linking. The effective lightning resistance is also considered, as the application of repetitive lightning impulse overvoltages can be a factor in insulation material ageing of high voltage cables. The material was cross-linked using trigonox-145 peroxide with controlled concentration. Samples were moulded to have a Rogowski profile and gold coated to make sure that they are evenly electrically stressed. Obtained results show that there are reductions in both space charge injection and the permittivity of the material after it is cross-linked. The breakdown strength of the material was also improved. However, the samples studied are more susceptible to ageing due to lightning impulses.
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Dao, N L
747dde4f-7c71-46cb-b9dd-0ceb36a38688
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Swingler, S G
4f13fbb2-7d2e-480a-8687-acea6a4ed735
22 August 2011
Dao, N L
747dde4f-7c71-46cb-b9dd-0ceb36a38688
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Swingler, S G
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Dao, N L, Lewin, P L and Swingler, S G
(2011)
Effect of Cross-Linking on the Electrical Properties of LDPE and its Lightning Impulse Ageing Characteristics.
17th International Symposium on High Voltage Engineering, Hannover, Germany.
22 - 26 Aug 2011.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Cross-linked polyethylene (XLPE) is commonly used within high voltage cable insulation. It has improved thermal and mechanical resistance compared to normal low density polyethylene (LDPE). However, the cross-linking process may also vary the electrical characteristics of the material. This paper investigates changes in electrical properties of one type of LDPE before and after cross-linking. The effective lightning resistance is also considered, as the application of repetitive lightning impulse overvoltages can be a factor in insulation material ageing of high voltage cables. The material was cross-linked using trigonox-145 peroxide with controlled concentration. Samples were moulded to have a Rogowski profile and gold coated to make sure that they are evenly electrically stressed. Obtained results show that there are reductions in both space charge injection and the permittivity of the material after it is cross-linked. The breakdown strength of the material was also improved. However, the samples studied are more susceptible to ageing due to lightning impulses.
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Published date: 22 August 2011
Additional Information:
Event Dates: 22-26 August 2011
Venue - Dates:
17th International Symposium on High Voltage Engineering, Hannover, Germany, 2011-08-22 - 2011-08-26
Organisations:
Electronics & Computer Science, EEE
Identifiers
Local EPrints ID: 272707
URI: http://eprints.soton.ac.uk/id/eprint/272707
PURE UUID: a085ca9f-7228-47ce-95e4-ae73f053e117
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Date deposited: 24 Aug 2011 07:15
Last modified: 15 Mar 2024 02:43
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Contributors
Author:
N L Dao
Author:
P L Lewin
Author:
S G Swingler
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