Discrimination of Partial Discharges in Gaseous and Liquid Nitrogen by Using Waveform Characteristics

被引：2
|
作者：
Yamada, Kazuki [1 ]
Kawashima, Tomohiro [1 ]
Obana, Tetsuhiro [2 ]
Murakami, Yoshinobu [1 ]
Nagao, Masayuki [1 ]
Hozumi, Naohiro [1 ]
机构：
[1] Toyohashi Univ Technol, Dept Elect & Elect Informat Engn, Toyohashi, Aichi 4418580, Japan
[2] Natl Inst Fus Sci, Device Engn & Adv Phys Res Div, Toki, Gifu 5095292, Japan
来源：
PLASMA AND FUSION RESEARCH | 2020年 / 15卷
关键词：
electrical insulation; partial discharge; waveform characteristics; liquid nitrogen; gaseous nitrogen; BREAKDOWN CHARACTERISTICS;
D O I：
10.1585/pfr.15.2401025
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The cryogenic coolant is important as an electrical insulation in an immersion cooling. One of the dielectric breakdown mechanisms of the cryogenic coolant is via bubbles, caused by partial discharge (PD). The insulation performance has been discussed with PD parameters and breakdown voltage. However, the essential PD mechanism has not been clarified in detail. In this paper, PDs in gaseous and liquid nitrogen were discriminated based on characteristics of the original PD waveform. It was shown that the difference in charge behavior appears significantly in the fall time of the original PD waveform. (C) 2020 The Japan Society of Plasma Science and Nuclear Fusion Research
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页数：4
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