Electrical aging of fluoropolymer cable insulation materials induced by partial discharge

This study investigates AC electrical aging induced by partial discharge (PD) in fluoropolymer cable insulation materials, namely fluorinated ethylene propylene (FEP) and perfluoroalkoxy (PFA), with the cross-linked polyethylene (XLPE) serving as the reference material. Utilizing a specialized elect...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2024, p.1-1
Main Authors: Kantar, Emre, Eie-Klusmeier, Katharina K., Ve, Torbjorn Andersen, Ese, Marit-Helen, Hvidsten, Sverre
Format: Article
Language:English
Subjects:
Aging
cable insulation
Degradation
Electrodes
FEP
fluoropolymers
Insulation
partial discharge
Partial discharges
PFA
Polymers
Surface discharges
XLPE
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Summary:This study investigates AC electrical aging induced by partial discharge (PD) in fluoropolymer cable insulation materials, namely fluorinated ethylene propylene (FEP) and perfluoroalkoxy (PFA), with the cross-linked polyethylene (XLPE) serving as the reference material. Utilizing a specialized electrical aging setup and comprehensive surface characterization techniques, we compared the aging behavior of FEP and PFA to that of XLPE under identical electrical discharge conditions. Over a three-week aging process, the stability of phase-resolved partial discharge (PRPD) patterns for FEP and PFA suggested minimal changes in surface chemistry and roughness, unlike XLPE. FTIR and Raman spectroscopy results confirmed minimal changes in the surface chemistry of FEP and PFA, while microscopic and profilometric analyses demonstrated notably fewer PD-induced alterations on their surfaces. These findings suggest a gradual aging effect on the electrical insulating properties of fluoropolymers, likely due to their resilient carbon-fluorine bonds, contrasting with the immediate and significant erosion and by-product formation observed in XLPE upon PD exposure.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2024.3402663