摘要
为了防止GIS的内部缺陷进一步发展造成事故,对GIS局部放电(局放)进行检测十分必要。笔者利用GIS特高频局放在线监测系统发现110 kV高新站110 kV GIS秀高Ⅰ线间隔有局部放电信号,并采取现场GIS局放带电测试、定位,以及进行一序列的开盖检查及缺陷排查,发现局放源位于110 kV高新站秀高Ⅰ线GIS A相电缆终端接头位置,最后更换了A相电缆终端接头后局放信号消失,避免了事故的发生,从而验证了GIS特高频局放在线监测系统检测GIS设备内电缆终端头故障的有效性,为较早地发现GIS内电缆终端头内部缺陷提供了有效检测方法和依据。
Through using ultrahigh-frequency partial discharge （PD） online-monitoring system of GIS, the PD signal was found in the compartment of Xiugao No.1 line of 110 kV GIS in 110 kV Gaoxin substation. The live partial discharge detection and location of GIS, as well as uncovering check, were conducted, and the PD source was found at A-phase cable terminal joint of Xiugao No.1 line of 110 kV GIS in 110 kV Gaoxin substation. By replacing the A-phase cable terminal joint, the PD signal disappeared, and a possible accident was hence avoided, which demonstrates that the method of ultra high frequency partial discharge （PD） online-monitoring system of GIS is effective in detecting the fault of cable terminal joint in GIS.
出处
《高压电器》
CAS
CSCD
北大核心
2012年第11期119-124,共6页
High Voltage Apparatus
