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Proceedings Paper

Brillouin distributed temperature sensing system for monitoring of submarine export cables of off-shore wind farms
Author(s): Benjamin Marx; Alexander Rath; Frederick Kolm; Andreas Schröder; Christian Buntebarth; Albrecht Dreß; Wieland Hill
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Paper Abstract

For high-voltage cables, the maximum temperature of the insulation must never be exceeded at any location and at any load condition. The local temperatures depend not only on the cable design and load history, but also on the local thermal environment of the cable. Therefore, distributed temperature monitoring of high-voltage cables is essential to ensure the integrity of the cable at high load. Especially, the load of the export cables of wind farms varies strongly in dependence on weather conditions. In this field study, we demonstrate the measurement performance of a new, robust Brillouin distributed temperature sensing system (Brillouin-DTS). The system is based on spontaneous Brillouin scattering and does not require a fibre loop. This is essential for long submarine high-voltage cables, where normally no loop can be formed in the seabed. It is completely passively cooled and does not contain any moving or wearing parts. The instrument is dedicated for use in industrial and other rough environments. With a measuring time below 10 min, the temperature resolution is better than 1 °C for distances up to 50 km. In the field study, the submarine export cable of an off-shore wind farm has been monitored. The temperature profile of the export cable shows several hot spots, mostly located at cable joints, and also several cold spots.

Paper Details

Date Published: 30 May 2016
PDF: 4 pages
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162U (30 May 2016); doi: 10.1117/12.2236622
Show Author Affiliations
Benjamin Marx, LIOS Technology GmbH (Germany)
Alexander Rath, LIOS Technology GmbH (Germany)
Frederick Kolm, LIOS Technology GmbH (Germany)
Andreas Schröder, LIOS Technology GmbH (Germany)
Christian Buntebarth, LIOS Technology GmbH (Germany)
Albrecht Dreß, LIOS Technology GmbH (Germany)
Wieland Hill, LIOS Technology GmbH (Germany)

Published in SPIE Proceedings Vol. 9916:
Sixth European Workshop on Optical Fibre Sensors
Elfed Lewis, Editor(s)

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