Present Status and prospect of Research of On-Line Partial Discharge Monitoring System in GIS
YU Weiyong · Gao dianya jishu · 2005
Several aspects concerning Partial Discharge ( PD) on-line monitoring system in GIS are taken in this paper. Firstly, the caus e of PD is described and five methods of PD on-line monitoring are put forward, among which Ultra-High Frequency (UHF) and ultrasonic methods are used widely because they have the advantages, such as fault sources location, high sensitivi ty and used in operating equipment availably, etc. Secondly, several new equipme nts and methods used in recent years are introduced and a broad view of present status about PD on-line monitoring in GIS is presented. Furthermore, the patter n recognition methods of PD defects are summarized, which emphasized on how to d etermine the pattern of PD using the relationship between distribution of phase and the polarity of different types of PD. At last, the outstanding problems are put forward and the tendency of the research is summarized and forecasted.