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Analytical thermal rating method for cables installed in J-tubes

Analytical thermal rating method for cables installed in J-tubes
Analytical thermal rating method for cables installed in J-tubes
One possible thermal pinch point along the route of a wind farm export circuit is a J tube, commonly used to provide mechanical protection to cable sections between the sea floor and the offshore platform. Current ratings for such cable sections are not covered by the scope of IEC 60287, while the existing publications covering such systems have limitations. This paper presents an updated 2D analytical method and a 3D extension for the rating of J tubes with short air section lengths. Continuous rating comparisons have been made against a 3D finite element model which shows a 4.5% variation in rating from the 2D analytical model for air section lengths greater than 10 m, rising to 13% for short air section lengths. With the addition of longitudinal heat transfer within the new 3D analytical approach this variation decreases by 2.5%. Both methods proposed can be solved readily using conventional spreadsheet tools and are broadly compliant with the IEC 60287 methodology.
0885-8977
1721-1729
Chippendale, Richard
cf41605b-ee11-4205-a817-b8519215deb6
Pilgrim, James
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Goddard, Kevin
fe2a2194-8b55-43c1-bdca-341691b71b2d
Cangy, Priank
810d2fe7-2018-47aa-9afe-551a5e8b62f8
Chippendale, Richard
cf41605b-ee11-4205-a817-b8519215deb6
Pilgrim, James
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Goddard, Kevin
fe2a2194-8b55-43c1-bdca-341691b71b2d
Cangy, Priank
810d2fe7-2018-47aa-9afe-551a5e8b62f8

Chippendale, Richard, Pilgrim, James, Goddard, Kevin and Cangy, Priank (2016) Analytical thermal rating method for cables installed in J-tubes. IEEE Transactions on Power Delivery, 32 (4), 1721-1729, [7479544]. (doi:10.1109/TPWRD.2016.2571844).

Record type: Article

Abstract

One possible thermal pinch point along the route of a wind farm export circuit is a J tube, commonly used to provide mechanical protection to cable sections between the sea floor and the offshore platform. Current ratings for such cable sections are not covered by the scope of IEC 60287, while the existing publications covering such systems have limitations. This paper presents an updated 2D analytical method and a 3D extension for the rating of J tubes with short air section lengths. Continuous rating comparisons have been made against a 3D finite element model which shows a 4.5% variation in rating from the 2D analytical model for air section lengths greater than 10 m, rising to 13% for short air section lengths. With the addition of longitudinal heat transfer within the new 3D analytical approach this variation decreases by 2.5%. Both methods proposed can be solved readily using conventional spreadsheet tools and are broadly compliant with the IEC 60287 methodology.

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Accepted/In Press date: 30 April 2016
e-pub ahead of print date: 26 May 2016
Published date: 26 May 2016
Organisations: EEE

Identifiers

Local EPrints ID: 394857
URI: http://eprints.soton.ac.uk/id/eprint/394857
ISSN: 0885-8977
PURE UUID: 8e942c15-f39f-4786-8f33-320033f20419
ORCID for James Pilgrim: ORCID iD orcid.org/0000-0002-2444-2116

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Date deposited: 20 May 2016 11:06
Last modified: 17 Jul 2021 01:42

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Contributors

Author: Richard Chippendale
Author: James Pilgrim ORCID iD
Author: Kevin Goddard
Author: Priank Cangy

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