GIS中局部放电在线监测研究的现状与展望

Present Status and prospect of Research of On-Line Partial Discharge Monitoring System in GIS

阐述了GIS的局部放电产生的根本原因和目前普遍采用的5种在线监测方法。介绍了相位门极控制、物理—化学诊断、小波和有限时域差分等近期新的研究,在故障模式识别方法中,重点介绍了通过局放信号相位分布与放电模式极性间关系判别故障类型的方法;最后提出了该项研究目前存在的问题及发展方向。

Several aspects concerning Partial Discharge (PD) on-line monitoring system in GIS are taken in this paper. Firstly, the cause 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 sensitivity and used in operating equipment availably, etc. Secondly, several new equipments 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 pattern recognition methods of PD defects are summarized, which emphasized on how to determine 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.