STEM-EDS of Inception Sites of Vented Trees in a HV XLPE Subsea Cable

Hårberg, Sofie Brandtzæg; Nylund, Inger-Emma; Einarsrud, Mari-Ann; Vullum, Per Erik; Lesaint, Cedric Michel; Hvidsten, Sverre
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https://hdl.handle.net/11250/3118988
Date
2023
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Abstract
High voltage XLPE cable cores have been subjected to wet ageing following the recommendations in CIGRE TB 722. The electrical ageing was performed at 500 Hz and 10 kV/mm. Vented water trees were detected initiating and growing from the semi-conductive screens. The inception sites of the trees were cut by cryo-microtomy and studied using scanning transmission electron microscopy with energy dispersive X-ray spectroscopy (STEM-EDS). Inorganic impurities were detected on both sides of the smooth XLPE-semiconductive screen interface close to the inception site. KEYWORDS High voltage XLPE cables, Vented water trees, STEM-EDS, Inception site
 
STEM-EDS of Inception Sites of Vented Trees in a HV XLPE Subsea Cable
 
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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal