Review of global HVDC subsea cable projects and the application of sea electrodes

Sutton, S J, Lewin, P L and Swingler, S G (2016) Review of global HVDC subsea cable projects and the application of sea electrodes International Journal of Electrical Power & Energy Systems, 87, pp. 121-135.


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Sea electrodes have been used since the first HVDC subsea links were installed in the 1950s and provide a simple proven solution for the return current path. Today around 30% of the approximately 40 HVDC subsea links in service use sea electrodes as the return current path under normal or emergency operation conditions. This paper reviews the evolution of interconnectors with sea electrodes and the factors, such as location, environmental impact, current capacity and financial factors (cost, flexibility, losses) which need to be assessed before adopting a sea electrode. In particular findings from environmental studies undertaken on existing sea electrodes are reviewed, as well as, the detailed content of recent Environmental Impact Statements for HVDC projects with proposed sea returns. Finally, the reasons for a change in design on links with a proposed sea return to a metallic return are also considered.

Item Type: Article
ISSNs: 0142-0615 (print)
Keywords: HVDC, Cable, Subsea cable, Marine electrode, Sea electrode, Return path
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Organisations: EEE
ePrint ID: 405092
Date :
Date Event
15 November 2016Accepted/In Press
1 May 2017Published
Date Deposited: 24 Jan 2017 15:47
Last Modified: 22 Feb 2017 02:03
Further Information:Google Scholar

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