Title :
PD inception characteristics in LN2/PP laminated paper composite insulation system for HTS cable
Author :
Okubo, H. ; Hazeyama, M. ; Kobayashi, T. ; Hayakawa, N. ; Takahashi, T. ; Yasuda, K.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
In this paper, we discussed partial discharge (PD) inception characteristics in liquid nitrogen (LN2)/polypropylene (PP) laminated paper composite insulation system in terms of volume effect and V-t characteristics, both for PD inception strength (PDIE). Different kinds of butt gap condition were applied in the experiments, using parallel plane and coaxial cylindrical cable samples. Experimental results revealed that the volume effect on PDIE could be evaluated by the statistical stressed liquid volume (SSLV) taking account the discharge probability not only in the butt gap but also in the other thin layers between PP laminated papers. Furthermore, the indices n of V-t characteristics at PD inception were estimated to be 80∼100, irrespective of the butt gap condition.
Keywords :
composite insulating materials; electric strength; filled polymers; laminates; laminations; nitrogen; paper; partial discharges; superconducting cables; HTS cable; LN2/PP laminated paper composite insulation; N; PD inception; V-t characteristic; butt gap; parallel plane cable samples; partial discharge inception; statistical stressed liquid volume; thin layers; volume effect; Cable insulation; Coaxial cables; Dielectrics and electrical insulation; Electrodes; High temperature superconductors; Partial discharges; Probability; Superconducting cables; Voltage; Volume measurement;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on
Print_ISBN :
0-7803-7725-7
DOI :
10.1109/ICPADM.2003.1218634
