Mapping of inorganic impurities in state-of-the-art wet-design subsea power cables for fundamental understanding of breakdown mechanism

Name: Mapping of inorganic impurities in state-of-the-art wet-design subsea power cables for fundamental understanding of breakdown mechanism
Creator: NTNU, IMA, Sem Sælands vei 12, 7491 Trondheim, Norway; Norwegian University of Science & Technology, FACET, Dept. of Materials Science and Engineering, Sem Sælands Vei 12 Kjemiblokk Ii K2-132, 7491 Trondheim, Norway
Published: 2027-01-01 00:00:00
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ESRF Portal2027-01-01 更新2026-04-23 收录

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https://doi.esrf.fr/10.15151/ESRF-ES-1919250184

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资源简介：

Wet-design subsea power cables, which have their polymeric insulation system exposed to water, are successfully used up to 36.5 kV . However, they are prone to irreversible degradation by water treeing at high voltages. For water trees to grow they need an initiation site, which is normally an impurity at the interface between the semiconductive screens and the insulation. In our latest work we found that water trees can grow from smooth and clean interfaces, where microstructural and chemical defects lie further away from the water tree inception site than ever seen before. Preliminary work on these samples at ID13 by SAXS and WAXS show that these techniques can provide essential information about the impurities and how they are distributed in the observed microstructural features compared to the bulk. The results from these combined studies will give a fundamental understanding of the mechanism for breakdown of the subsea cables and prove our hypothesis.

提供机构：

NTNU, IMA, Sem Sælands vei 12, 7491 Trondheim, Norway; Norwegian University of Science & Technology, FACET, Dept. of Materials Science and Engineering, Sem Sælands Vei 12 Kjemiblokk Ii K2-132, 7491 Trondheim, Norway

创建时间：

2027-01-01