USING THE UHF TECHNIQUE TO INVESTIGATE PD PRODUCED BY DEFECTS IN SOLID INSULATION

被引:15
作者
SELLARS, AG [1 ]
FARISH, O [1 ]
HAMPTON, BF [1 ]
PRITCHARD, LS [1 ]
机构
[1] ROLLS ROYCE PLC,IND POWER GRP,HEBBURN,TYNE & WEAR,ENGLAND
关键词
D O I
10.1109/94.395417
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 partial discharges produced by internal defects in solid insulation have been investigated using the ultra high frequency (UHF) technique. The work has shown that the discharges produced by a virgin cavity generate a UHF signal that may be detected using this UHF technique. The discharges are observed as a series of UHF pulses that occur less frequently as time progresses. The reduction in the number of UHF pulses has been attributed to a progressive change from the streamer discharge mechanism, that is observed with a virgin cavity, to the Townsend mechanism, which occurs when the cavity has been exposed to prolonged discharge activity. It also has been shown that the discharges associated with tree formation generate a detectable UHF signal. The paper describes a method of distinguishing between the streamer discharges and the discharges that cause treeing.
引用
收藏
页码:448 / 459
页数:12
相关论文
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