Effects of Electrical Arc on Dielectric Properties and Initial Discharge Patterns of Silicone Oil in GIS Terminal

被引：0

作者：

Zhang R. ^{[1
]}

Guo G. ^{[1
]}

Wu J. ^{[1
]}

Jiang Y. ^{[2
]}

Qiu Z. ^{[1
]}

机构：

[1] Graduate School at Shenzhen, Tsinghua University, Shenzhen

[2] Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan

来源：

Zhang, Ruobing (zhangrb@sz.tsinghua.edu.cn) | 2018年 / Science Press卷 / 44期

基金：

中国国家自然科学基金;

关键词：

Breakdown voltage; Dielectric properties; Discharge capacity; Electrical arc; Initial discharge; Silicone oil; Sludge;

D O I：

10.13336/j.1003-6520.hve.20180301009

中图分类号：

学科分类号：

摘要：

Electrical arc can not only induce the dielectric characteristic loss of silicone oil, but also increase the local temperature of silicone oil. So it is very important to investigate effects of electrical arc on properties of silicone oil. We studied effects of electrical arc on dielectric properties and initial discharge patterns of silicone oil using a needle-plate electrode. Experimental results show that sustained electrical arc discharges break the silicone's long chain, and form black sludge, accompanying a gradually change of the liquid color from colorless to brown, and finally dark in the end; The amount of black sludge increases with the discharge capacity, but decreases the breakdown voltage and initial discharge voltage of oil. When the arc discharge capacity increases to 1.98×1010 pC, the value of dielectric loss factor (tanδ) increases from 0.002% to 1.3%, while the volume resistivity and breakdown voltage of silicone oil(ρ) decrease from 1.25×1013 Ω•m and 45.8 kV to 7.8×1010 Ω•m and 16 kV, respectively. In addition, the initial discharge voltage of oil declines from 24 kV to 10 kV. © 2018, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：733 / 739

页数：6

共 19 条

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