Effect of Moisture on Low Frequency Relaxation of Oil-Paper Insulation

被引：1
作者：
Hu, Yizhuo [1 ]
Dong, Ming [1 ]
Xie, Jiacheng [1 ]
Xu, Guanghao [1 ]
Ma, Xinyi [1 ]
Ren, Ming [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat Power Equipment, Xian, Shaanxi, Peoples R China
来源：
2019 IEEE 20TH INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS (ICDL) | 2019年
基金：
中国国家自然科学基金;
关键词：
oil-paper insulation; frequency dielectric response; low frequency relaxation; moisture; DIELECTRIC RESPONSE;
D O I：
10.1109/icdl.2019.8796730
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The insulation performance of oil-paper insulation power equipment is seriously affected by moisture in oil and pressboard, but the current dielectric response diagnosis technologies are difficult to distinguish the effect of moisture and aging. In order to seek an effective moisture assessment method based on dielectric response technologies, the low frequency relaxation of oil-impregnated pressboard is tested and analyzed. Firstly, oil-impregnated pressboard samples of different moisture contents were prepared; then the frequency dielectric responses were tested, and the low frequency relaxation curves were obtained; finally, the effect of moisture on low frequency relaxation was discussed. The test results show that, the relaxation peak increases by moisture content, while the characteristic frequency of the peak remains the same. Besides, a new relaxation peak appeared at higher frequency range when moisture content is above 4%, which is considered to be caused by free water in oil-impregnated pressboard.
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页数：4
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