Title :
High temperature PD degradation characteristics in bulk and interfaces of insulating materials for power cables
Author :
Maruyama, Atsushi ; Komori, Fumitaka ; Suzuoki, Yasuo ; Okamoto, Tatsuki ; Nagata, Tatsuya
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
In order to check the possibility of raising the service temperature of installed power cables, PD degradation characteristics in materials for cable insulation and their interfaces were investigated at high temperatures (70-110°C). With increasing temperature, the tree inception voltage of XLPE bulk decreased below 90°C and increased above 90°C. The degradation at the interfaces was also investigated and the EPR surface showed peculiar type of degradation with void formation. Possible causes of the void formation are increase of pressure of gas due to decomposition of EPR, additives and impurities, desorption from EPR surface and so on
Keywords :
XLPE insulation; ethylene-propylene rubber; high-temperature effects; partial discharges; power cable insulation; trees (electrical); voids (solid); 70 to 110 C; EPR-epoxy resin interface; bulk XLPE; high temperature PD degradation; insulating material; power cable; tree inception voltage; void formation; Cable insulation; Degradation; Dielectrics and electrical insulation; Electrodes; Needles; Paramagnetic resonance; Power cables; Steel; Temperature; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
0-7803-5459-1
DOI :
10.1109/ICPADM.2000.875682
