Impulse and ac partial discharge inception and breakdown characteristics of LN2/polypropylene laminated paper composite insulation system
Impulse and ac partial discharge inception and breakdown characteristics of LN2/polypropylene laminated paper composite insulation system
复制标题
液氮/聚丙烯层压纸复合绝缘系统的脉冲和交流局部放电起始和击穿特性
DOI：
10.1109/tdei.2006.1657982
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发表时间：
2006
影响因子：
3.1
通讯作者：
N. Hayakawa
中科院分区：
文献类型：
--
作者：
H. Okubo;H. Kojima;F. Endo;K. Sahara;N. Hayakawa
研究了高温超导（HTS）电缆液氮（LN 2）/聚丙烯（PP）层压纸复合绝缘系统的局部放电起始和击穿特性。本文采用电学、光学和声学方法测量了雷电冲击和交流电压作用下的局部放电起始特性。比较了脉冲放电和交流放电的起始特性，并对脉冲放电的产生机理进行了探讨。实验结果表明，在雷电冲击电压下，局部放电检测灵敏度为6 pC。在较低的应力下，PD开始被证实不仅产生在对接间隙，但也在PP层压纸层之间的雷电脉冲和交流电压的应用程序的微间隙。PD开始后，在较高的应力下，PD活性可以在对接间隙中发展，最终导致BD
Partial discharge (PD) inception and breakdown (BD) characteristics of liquid nitrogen (LN2)/polypropylene (PP) laminated paper composite insulation system for high temperature superconducting (HTS) cables are presented. In this paper, we measured PD inception characteristics under lightning impulse and AC voltage applications by electrical, optical and acoustic methods. The impulse PD inception characteristics were compared with those under AC voltage application, and the PD generation mechanisms are discussed. Experimental results reveal that PD detection sensitivity under lightning impulse voltage application is as small as 6 pC. PD inception at the lower stress was verified to be generated not only in the butt gaps but also in micro gaps between PP laminated paper layers under both lightning impulse and AC voltage applications. After PD inception, PD activity could be developed in the butt gaps at the higher stress, finally leading to BD