V-t characteristics of partial discharge inception in liquid nitrogen/PPLP® composite insulation system for HTS cable

H. Okubo*, M. Hazeyama, N. Hayakawa, S. Honjo, T. Masuda

*この研究の対応する著者

研究成果: Article査読

14 被引用数 (Scopus)

抄録

In this paper, we studied partial discharge (PD) inception characteristics and V-t characteristics of PD inception in liquid nitrogen (LN2)/polypropylene laminated paper (PPLP®) composite insulation system for high temperature superconducting (HTS) cable. Experimental results revealed that the magnitude of initial PD was in the range of 2.0-30 pC irrespective of butt gap condition and the initial PD was generated at the first and third quadrant of voltage phase. PD inception electric field strength (PDIE) without butt gap was 5-10% higher than that with butt gap and thicker butt gap gave larger PDIE drop. Moreover, PDIE with butt gap depended on the butt gap thickness and the number of PPLP® layers. The reason is explained by the existing probability of weak points of electrical insulation at butt gap. Finally, lifetime indices n of V-t characteristics at PD inception were obtained as 80-100 irrespective of butt gap condition. These values showed enough flat characteristics of V-t phenomena of electrical insulation.

本文言語English
ページ(範囲)945-951
ページ数7
ジャーナルIEEE Transactions on Dielectrics and Electrical Insulation
9
6
DOI
出版ステータスPublished - 2002 12月
外部発表はい

ASJC Scopus subject areas

  • 電子工学および電気工学

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