Partial discharge inception characteristics of LN/sub 2//polypropylene laminated paper composite insulation system for high temperature superconducting cables
Partial discharge inception characteristics of LN/sub 2//polypropylene laminated paper composite insulation system for high temperature superconducting cables
复制标题
高温超导电缆LN/sub 2//聚丙烯层压纸复合绝缘系统的局部放电起始特性
DOI：
10.1109/tdei.2005.1394027
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发表时间：
2005
影响因子：
3.1
通讯作者：
H. Okubo
中科院分区：
文献类型：
--
作者：
N. Hayakawa;T. Kobayashi;M. Hazeyama;T. Takahashi;K. Yasuda;H. Okubo
从体积效应和V-t特性两个方面研究了液氮（液氮）/聚丙烯（PP）叠层纸复合绝缘系统的局部放电起始特性。光电特性测试结果表明，PP层压纸层间和对接间隙均可产生局部放电。利用基于PP层压纸之间对接间隙和填充液氮薄层放电概率的统计应力液体体积（SSLV）参数，系统分析和评价了体积效应对PD起始应力（PDIE）的影响。此外，实验结果表明，在PD开始的V-t特性的n值高达80-110。另一方面，在击穿时获得的较低的n值被解释为在PD开始后产生的热气泡中增强的PD发展
Partial discharge (PD) inception characteristics of liquid nitrogen (LN2)/polypropylene (PP) laminated paper composite insulation system for high temperature superconducting (HTS) cables were investigated in terms of the volume effect and the V-t characteristics. The electrical and optical measurements of PD inception characteristics showed that initial PD could be generated between PP laminated paper layers, as well as in a butt gap. Using a parameter called statistically stressed liquid volume (SSLV) based on the discharge probability in both butt gaps and LN2-filled thin layers between PP laminated papers, we could systematically analyze and evaluate the volume effect on PD inception stress (PDIE). Furthermore, experimental results revealed that n values of V-t characteristics at PD inception were as high as 80-110. On the other hand, the lower n values obtained at breakdown were interpreted by the intensified PD development in thermal bubbles generated after the PD inception