广东电力2017，Vol.30Issue(3)：71-75,80,6.DOI:10.3969/j.issn.1007-290X.2017.03.014
GIS沿面放电缺陷的振动检测法分析
Analysis on Vibration Detection Method for Creeping Discharge Defect in GIS
摘要
Abstract
With regard to common but serious partial discharge (PD) defect such as insulation creeping discharge in gas insulated metal enclosed switchgear and controlgear (GIS), there are no proper diagnosis methods at present.Therefore, vibration method was adopted for fault monitoring and diagnosis.It was discovered that energy of GIS PD mainly concentrated in the range of 1.6~6.4 kHz frequency band according to wavelet packet analysis on collected GIS vibration signals.Thus, 1.6~6.4 kHz frequency band was proposed to be taken as the characteristic frequency band and PD characteristic coefficient was presented which was defined as ratio of the total energy of 1.6~6.4 kHz frequency band and that of 6.4~12.8 kHz frequency band.By observing the value of characteristic coefficient which was compared with that under the normal condition, it was able to judge whether there was creeping discharge defect in GIS.Threshold range of the characteristic coefficient was presented and severity degrees of creeping discharge were divided as well.Research indicates that this method can effectively diagnose creeping discharge fault in GIS and has better effect compared with other methods.关键词
电力气体绝缘金属封闭开关设备(GIS)/绝缘子沿面放电/振动/特征频段/局部放电特征系数/阈值Key words
gas insulated metal enclosed switchgear and controlgear/insulator creeping discharge/vibration/characteristic frequency band/partial discharge characteristic coefficient/threshold value分类
信息技术与安全科学引用本文复制引用
刘勇业,马宏忠,姜宁,李凯,李勇,许洪华..GIS沿面放电缺陷的振动检测法分析[J].广东电力,2017,30(3):71-75,80,6.基金项目
国网江苏省电力公司重点科技项目(J2015054) （J2015054）
