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Towards active cable reburial monitoring using distributed fiber-optic sensing over 40km of a high voltage marine interconnector

Towards active cable reburial monitoring using distributed fiber-optic sensing over 40km of a high voltage marine interconnector
Towards active cable reburial monitoring using distributed fiber-optic sensing over 40km of a high voltage marine interconnector
Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) measurements were acquired over a 40 km section of the 137 km long Skagerrak 4 (SK4) subsea cable before and during a retrenching operation. Five sections of the cable between 140 m and 280 m in length had been identified for reburial using conventional geophysical and video techniques. DTS data taken over a three week period prior to the reburial clearly showed cold spots at all of the planned reburial sites. Absolute temperature at these locations fluctuated by over 8 °C, which is interpreted as being in response to temporally and spatially varying bottom water temperatures. The reburial process itself was accurately monitored in real-time using DAS. After reburial, consistent DTS temperatures within ± 1 °C were measured at all reburial sites, comparable to the adjacent buried sections of the cable and thereby confirming reburial was successful.
Erdmann, Matthias
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Dix, Justin
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Ellis, Daniel
f15e8463-b832-4719-a749-ddf88de8bec5
Callender, George
4189d79e-34c3-422c-a601-95b156c27e76
Pilgrim, James
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Lees, Gareth P.
13384bff-3a8a-4525-b213-77eb17cb1c79
Rogers, Rosalie
352df810-5a1e-4e4c-99ed-94aa754769f0
Hansen, Henrik Roland
99f0e81e-c6e7-4987-9d3e-2a6536cf5ec2
Lucignano, Tony
0d9103cc-1e4c-45fa-ba71-a43715317c2f
Erdmann, Matthias
3d96f444-3be1-4fa4-b211-6eb102a2aa21
Dix, Justin
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Ellis, Daniel
f15e8463-b832-4719-a749-ddf88de8bec5
Callender, George
4189d79e-34c3-422c-a601-95b156c27e76
Pilgrim, James
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Lees, Gareth P.
13384bff-3a8a-4525-b213-77eb17cb1c79
Rogers, Rosalie
352df810-5a1e-4e4c-99ed-94aa754769f0
Hansen, Henrik Roland
99f0e81e-c6e7-4987-9d3e-2a6536cf5ec2
Lucignano, Tony
0d9103cc-1e4c-45fa-ba71-a43715317c2f

Erdmann, Matthias, Dix, Justin, Ellis, Daniel, Callender, George, Pilgrim, James, Lees, Gareth P., Rogers, Rosalie, Hansen, Henrik Roland and Lucignano, Tony (2019) Towards active cable reburial monitoring using distributed fiber-optic sensing over 40km of a high voltage marine interconnector. Jicable: 10th International Conference on Insulated Power Cables, Versailles, France. 23 - 26 Jun 2019. 7 pp . (Submitted)

Record type: Conference or Workshop Item (Paper)

Abstract

Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) measurements were acquired over a 40 km section of the 137 km long Skagerrak 4 (SK4) subsea cable before and during a retrenching operation. Five sections of the cable between 140 m and 280 m in length had been identified for reburial using conventional geophysical and video techniques. DTS data taken over a three week period prior to the reburial clearly showed cold spots at all of the planned reburial sites. Absolute temperature at these locations fluctuated by over 8 °C, which is interpreted as being in response to temporally and spatially varying bottom water temperatures. The reburial process itself was accurately monitored in real-time using DAS. After reburial, consistent DTS temperatures within ± 1 °C were measured at all reburial sites, comparable to the adjacent buried sections of the cable and thereby confirming reburial was successful.

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Submitted date: 29 April 2019
Venue - Dates: Jicable: 10th International Conference on Insulated Power Cables, Versailles, France, 2019-06-23 - 2019-06-26

Identifiers

Local EPrints ID: 430612
URI: https://eprints.soton.ac.uk/id/eprint/430612
PURE UUID: eabec253-7818-44a5-9d01-7dfe7649604a
ORCID for James Pilgrim: ORCID iD orcid.org/0000-0002-2444-2116

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Date deposited: 07 May 2019 16:30
Last modified: 08 May 2019 00:33

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Contributors

Author: Matthias Erdmann
Author: Justin Dix
Author: Daniel Ellis
Author: George Callender
Author: James Pilgrim ORCID iD
Author: Gareth P. Lees
Author: Rosalie Rogers
Author: Henrik Roland Hansen
Author: Tony Lucignano

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