Partial discharge inception characteristics under butt gap condition in liquid nitrogen/ PPLP/sup /spl reg// composite insulation system for high temperature superconducting cable
Partial discharge inception characteristics under butt gap condition in liquid nitrogen/ PPLP/sup /spl reg// composite insulation system for high temperature superconducting cable
复制标题
高温超导电缆液氮/PPLP/sup/spl reg//复合绝缘系统对接间隙条件下的局部放电起始特性
DOI：
10.1109/tdei.2002.1115487
复制
发表时间：
2002
影响因子：
3.1
通讯作者：
H. Okubo
中科院分区：
文献类型：
--
作者：
M. Hazeyama;T. Kobayashi;N. Hayakawa;S. Honjo;T. Masuda;H. Okubo
研究了高温超导（HTS）电缆液氮（LN/sub 2/）/聚丙烯层压纸（PPLP/sup /spl reg//）复合绝缘系统的局部放电（PD）起始特性。实验结果表明，随着局放起始电场强度的增加，初始局放的幅度也随之增加，这是因为注入的能量增加了。初始局部放电在施加的交流电压相位的第一和第三象限产生。正负电压阶段初始局部放电的概率几乎相同。原因是液氮是非极性分子，并且我们使用具有均匀电场分布的对称电极配置。最后指出，由于电绝缘薄弱点出现的概率增加，局部放电初始电场强度（PDIE）取决于对接间隙的体积，并且在双对数尺度上，PDIE随着对接间隙受力体积的增加而线性下降。
The partial discharge (PD) inception characteristics are studied in liquid nitrogen (LN/sub 2/)/polypropylene laminated paper (PPLP/sup /spl reg//) composite insulation system for high temperature superconducting (HTS) cable. Experimental results revealed that the magnitude of the initial PD increased as the PD inception electric field strength was increased, because the injected energy increased. Initial PD was generated at the first and third quadrant of applied AC voltage phase. The probability of initial PD at the positive and negative voltage phase was almost the same. The reason is because liquid nitrogen is a nonpolar molecule and we used symmetric electrode configuration with uniform electric field distribution. Finally, it was pointed out that PD inception electric field strength (PDIE) depended on the volume of the butt gap because of the increasing probability of weak points of electrical insulation, and PDIE linearly decreased with increasing stressed volume of the butt gap in the log-log scale.