Electromagnetic Assessment of Submarine Power Cable Degradation Using Finite Element Method and Sensitivity Analysis

Submarine power cables used for offshore wind farms
electric energy distribution and transmission are subject to numerous
threats. Some of the risks are associated with transport, installation
and operating in harsh marine environment. This paper describes the
feasibility of an electromagnetic low frequency sensing technique for
submarine power cable failure prediction. The impact of a structural
damage shape and material variability on the induced electric field is
evaluated. The analysis is performed by modeling the cable using the
finite element method, we use sensitivity analysis in order to identify
the main damage characteristics affecting electric field variation.
Lastly, we discuss the results obtained.

Authors:

• N. Boutra
• N. Ravot
• J. Benoit
• O. Picon

Keywords:

• Electromagnetism
• defect
• finite element method
• sensitivity analysis
• submarine power cables.

References:

[1] D. le trepot. (2017) How offshore wind farms
work. (Online). Available: http://dieppe-le-treport.eoliennes-mer.fr/en/
offshore-wind-power/how-offshore-wind-farms-work/
[2] T. Worzyk, Submarine power cables: design, installation, repair,
environmental aspects. Springer Science & Business Media, 2009.
[3] L. Henan Huatai Special Cable Group Co. (2017) Armored cable
specifications. (Online). Available: https://huataitelan.en.alibaba.com/
product/489593578-200736931/armoured cable specifications.html
[4] T. CIGR´ E, “Brochure# 379,,” Update of service experience of HV
underground and submarine cable systems, 2009.
[5] Subsea Power Cables in Shallow Water Renewable Energy Applications,
DNV, 2 2014.
[6] D. H. Staelin, “Electromagnetics and applications,” Department of
Electrical Engineering and Computer Science, Massachusetts Institute
of Technology, Cambridge, MA, USA, 2011.
[7] A. Saltelli, S. Tarantola, F. Campolongo, and M. Ratto, Sensitivity
analysis in practice: a guide to assessing scientific models. John Wiley
& Sons, 2004.
[8] F. Campolongo, J. Cariboni, and A. Saltelli, “An effective screening
design for sensitivity analysis of large models,” Environmental modelling
& software, vol. 22, no. 10, pp. 1509–1518, 2007.
[9] F. Pianosi, F. Sarrazin, and T. Wagener, “A matlab toolbox for global
sensitivity analysis,” Environmental Modelling & Software, vol. 70, pp.
80–85, 2015.
[10] P.-A. Ekstr¨om, “Eikos: A simulation toolbox for sensitivity analysis,” in
2nd International Conference on Radioactivity in the Environment, 2e6
October, 2005, p. 361e364.
[11] N. Boutra, J. B. N Ravot, and O. Picon, “Etude du champ
electromagnetique dun cable sous marin dans le cadre d’un scenario
de defaillance,” in 13´eme Colloque International sur la Compatibilit´e
Electromagn´etique, Rennes (France), 2016.