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Novel Insulation Materials for High Voltage Cable Systems

Novel Insulation Materials for High Voltage Cable Systems
Novel Insulation Materials for High Voltage Cable Systems
Cross-linked polyethylene (XLPE) has replaced oil-paper insulated systems as the primary solution for medium and high voltage AC cables decades ago, since they enable marginally higher operating temperatures and can be produced with high throughput and well-controlled extrusion technology [1]. The base for this insulation is polyethylene (PE), which can be crosslinked either with peroxide cure (involving thermal decomposition), or by grafting silane onto the polymer chains, and the use of moisture-based cure [2]. Cross-linking is deemed necessary, since commercially available, branched low-density PE (LDPE) has more significant melting at temperatures around 100°C and the material loses all of its mechanical stability. In contrast, linear high-density PE (HDPE) has a higher melting point and can achieve higher operating temperatures. But, although HDPE found some success in medium voltage cables, it has not managed to establish a foothold in the high voltage (HV) cable sector [3]. After decades of research, conventional XLPE is at the limit of its capabilities, as outlined below, and further development is bound to have diminishing returns. Further, the costs of large extrusion and catenary cross-linking manufacturing facilities and the costs and time of degassing larger cross-section HV and extrahigh voltage cables present significant sustainability issues for cable manufacturers.
0883-7554
27-33
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Stevens, Gary
245b3f56-410b-42f4-85ad-72596ba9ae3c
Andritsch, Thomas, Vaughan, Alun and Stevens, Gary (2017) Novel Insulation Materials for High Voltage Cable Systems IEEE Electrical Insulation Magazine, 33, (4), pp. 27-33.

Andritsch, Thomas, Vaughan, Alun and Stevens, Gary (2017) Novel Insulation Materials for High Voltage Cable Systems IEEE Electrical Insulation Magazine, 33, (4), pp. 27-33.

Record type: Article

Abstract

Cross-linked polyethylene (XLPE) has replaced oil-paper insulated systems as the primary solution for medium and high voltage AC cables decades ago, since they enable marginally higher operating temperatures and can be produced with high throughput and well-controlled extrusion technology [1]. The base for this insulation is polyethylene (PE), which can be crosslinked either with peroxide cure (involving thermal decomposition), or by grafting silane onto the polymer chains, and the use of moisture-based cure [2]. Cross-linking is deemed necessary, since commercially available, branched low-density PE (LDPE) has more significant melting at temperatures around 100°C and the material loses all of its mechanical stability. In contrast, linear high-density PE (HDPE) has a higher melting point and can achieve higher operating temperatures. But, although HDPE found some success in medium voltage cables, it has not managed to establish a foothold in the high voltage (HV) cable sector [3]. After decades of research, conventional XLPE is at the limit of its capabilities, as outlined below, and further development is bound to have diminishing returns. Further, the costs of large extrusion and catenary cross-linking manufacturing facilities and the costs and time of degassing larger cross-section HV and extrahigh voltage cables present significant sustainability issues for cable manufacturers.

Text EIM_PP_final_TA_ASV_GCS - Accepted Manuscript
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More information

Accepted/In Press date: 12 March 2017
e-pub ahead of print date: 22 August 2017
Published date: 22 August 2017
Additional Information: Related publication: Andritsch, T. (2016). Life after XLPE: Novel insulation materials for HVDC cable systems. Conference on Electrical Insulation and Dielectric Phenomena, Toronto, Canada.
Organisations: EEE

Identifiers

Local EPrints ID: 408188
URI: http://eprints.soton.ac.uk/id/eprint/408188
ISSN: 0883-7554
PURE UUID: 41c9f9f1-92be-4061-a10f-4542d1517d79
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X

Catalogue record

Date deposited: 16 May 2017 04:02
Last modified: 10 Nov 2017 00:13

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Contributors

Author: Thomas Andritsch ORCID iD
Author: Alun Vaughan
Author: Gary Stevens

University divisions

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