UNDERSTANDING THE PARTIAL DISCHARGE ACTIVITY INITIATED BY A CONDUCTING PARTICLE IN GIS UNDER DC VOLTAGES USING UHF TECHNIQUE

被引：0
|
作者：
Sarathi, Ramanujam [1 ]
Umamaheswari, Rangasamy [1 ]
机构：
[1] Indian Inst Technol, Dept Elect Engn, Madras 600036, Tamil Nadu, India
来源：
JOURNAL OF ELECTRICAL ENGINEERING-ELEKTROTECHNICKY CASOPIS | 2009年 / 60卷 / 03期
关键词：
SF6; GIS; Partial discharges; UHF; Discharges; HVDC; INSULATED SYSTEMS; BREAKDOWN; AC;
D O I：
暂无
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 major cause of failure of DC-GIS is due to presence of foreign particles causing partial discharges in the insulation structure. It is realized that the levitation voltage of a particle in GIS is independent of polarity of applied DC voltage and operating pressure. It is observed that particle movement in GIS radiates electromagnetic waves and the bandwidth of the signal lies up to 2 GHz. Increase in applied voltage/pressure has not altered the frequency content in the UHF signal measured. It is observed that absolute charge injected due to partial discharge formed due to particle movement increases with increase in voltage/ambient pressure. It is also realized that partial discharge magnitude and the UHF signal amplitude have good correlation and show a proportionate increase.
引用
收藏
页码：136 / 142
页数：7
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