Summary
The offshore wind sector and other renewable energy sectors require efficient, reliable solutions for static and dynamic high-voltage cables. Wet design cables with an aluminium conductor offers a cost-effective option. In the present study, an extruded XLPE cable with a new aluminium alloy conductor with the same mechanical strength and fatigue properties as copper has been studied.
Read more Read lessConcerns have been raised regarding the use of aluminium conductors for wet-design cables due to corrosion of the aluminium strands which may induce degradation of the conductor screen known as Stress-Induced Electrochemical Degradation (SIED). However, SIED has only been observed when liquid water has been introduced between the conductor strands in laboratory or service aged cables with no strand filling compound.
The main purpose of this study is to examine if SIED can occur when water is transported by diffusion from outside the cable core to the aluminium strands. Model samples were exposed to water for up to 10 months, and subjected to temperature cycling or constant temperature conditions between 50 and 90 ˚C. After ageing, any corrosion of the aluminium strands and degradation of the conductor screens were characterised by microscopy, and elemental analysis of the surfaces. The results show that no SIED was found, despite the appearance of corrosion on the surface of the conductor strands.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B1_11845_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Norway |
| Study committees | |
| File size | 2 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
HØLTO Jorunn - SINTEF Energy; VE Torbjørn Andersen - SINTEF Energy; SWENSEN Emilie Hvidsten - SINTEF Energy; HVIDTSTEN Sverre - SINTEF Energy; OLSEN Elise - Nexans Norway; SKAGMEO Jørgen - Nexans Norway; BENGTSSON Karl Magnus - Nexans Norway
Keywords
Inter Array Cable Rating – Considerations Beyond IEC standards
