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The effect of composition and processing on electric characteristics of XLPE in HVDC cable applications

The effect of composition and processing on electric characteristics of XLPE in HVDC cable applications
The effect of composition and processing on electric characteristics of XLPE in HVDC cable applications
Polyethylene exhibits many key characteristics including low dielectric loss, high breakdown strength and good processability. Most modern extruded high voltage cables employ cross-linked polyethylene (XLPE) as the insulation material. The main advantage of XLPE is its excellent thermo-mechanical properties; it is relatively cheap and has low dielectric loss and low conductivity making it an ideal material for this application. Crosslinking enhances a number of thermo-mechanical properties such as deformation resistance at higher temperatures, tensile strength and creep properties. In comparison with lov density polyethylene (LDPE), the heat deformation characteristics of XLPE are superior and, for this reason, XLPE is currently the most common insulation material for power cables ranging from low to high voltages. This paper reports on an investigation into the development of a new XLPE formulation for use in high voltage direct current (HVDC) cable applications. Specifically, the electrical performance of two novel LDPE resins are compared with an industrial standard (reference) LDPE material. For crosslinking, dicumyl peroxide (DCP) was selected, as the decomposition temperature is high enough to prevent pre-curing during processing and to allow an efficient and rapid crosslinking at moderate temperatures. Moreover, the behavior of various systems is compared in terms of electrical breakdown performance and the influence of material composition and processing on these parameters is described.
440-443
Fazal, A.
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Hao, M.
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Vaughan, A.
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Chen, G.
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Cao, J.
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Wang, H.
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Fazal, A.
926d3b48-d11b-45b1-b922-5c2e8e3ba5fd
Hao, M.
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Vaughan, A.
6d813b66-17f9-4864-9763-25a6d659d8a3
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Cao, J.
f906efb8-4878-4419-867f-e787b289b00a
Wang, H.
d23f04f1-a300-4744-bd98-2df77c7047df

Fazal, A., Hao, M., Vaughan, A., Chen, G., Cao, J. and Wang, H. (2016) The effect of composition and processing on electric characteristics of XLPE in HVDC cable applications. IEEE Electrical Insulation Conference (EIC), 2016, Montreal, Canada. 18 - 21 Jun 2016. pp. 440-443 . (doi:10.1109/EIC.2016.7548632).

Record type: Conference or Workshop Item (Paper)

Abstract

Polyethylene exhibits many key characteristics including low dielectric loss, high breakdown strength and good processability. Most modern extruded high voltage cables employ cross-linked polyethylene (XLPE) as the insulation material. The main advantage of XLPE is its excellent thermo-mechanical properties; it is relatively cheap and has low dielectric loss and low conductivity making it an ideal material for this application. Crosslinking enhances a number of thermo-mechanical properties such as deformation resistance at higher temperatures, tensile strength and creep properties. In comparison with lov density polyethylene (LDPE), the heat deformation characteristics of XLPE are superior and, for this reason, XLPE is currently the most common insulation material for power cables ranging from low to high voltages. This paper reports on an investigation into the development of a new XLPE formulation for use in high voltage direct current (HVDC) cable applications. Specifically, the electrical performance of two novel LDPE resins are compared with an industrial standard (reference) LDPE material. For crosslinking, dicumyl peroxide (DCP) was selected, as the decomposition temperature is high enough to prevent pre-curing during processing and to allow an efficient and rapid crosslinking at moderate temperatures. Moreover, the behavior of various systems is compared in terms of electrical breakdown performance and the influence of material composition and processing on these parameters is described.

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More information

e-pub ahead of print date: June 2016
Published date: 25 August 2016
Venue - Dates: IEEE Electrical Insulation Conference (EIC), 2016, Montreal, Canada, 2016-06-18 - 2016-06-21
Organisations: EEE

Identifiers

Local EPrints ID: 401351
URI: http://eprints.soton.ac.uk/id/eprint/401351
PURE UUID: 7be2b575-692a-46f0-98f5-778f67d47758
ORCID for A. Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

Catalogue record

Date deposited: 17 Oct 2016 10:31
Last modified: 07 Oct 2020 01:44

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