摘要
带电检测是发现电力设备潜伏性运行隐患的重要手段,对高压开关柜进行局部放电带电检测,可以有效发现开关柜内部放电缺陷,避免由于放电引发的电网事故。通过暂态地电压、超声波和特高频局部放电检测法成功发现一起开关柜放电缺陷,经3种方法综合分析,得出此放电类型为较严重的悬浮放电和一定程度的沿面放电。利用特高频局部放电检测定位仪和高速数字示波器准确定位放电信号。最后结合停电工作对该开关柜进行解体,证实柜内确实发生严重放电。
Live detection is an important measure to find hidden danger of electric power equipment.Live detection of partial discharge in high voltage switchgear can effectively detect the internal discharge defects in the equipment and avoid the accidents caused by the discharge.In this paper, the discharge defect of a switchgear is successfully detected by transient earth voltage ,ultrasonic and ultrahigh frequency partial discharge detection.Through the methods, it is concluded that the discharge type is a serious suspended discharge and a certain degree of discharge along the surface.Then,the ultrahigh frequency partial discharge detection locator and high speed digital oscilloscope are used to locate the discharge signal accurately.Finally,the switchgear is disintegrated with scheduled outage, and it is confirmed that serious discharge did occur in the switchgear.
作者
梁雯
宋方超
张春旭
金爱民
LIANG Wen; SONG Fangchao ;ZHANG Chunxu ;JIN Aimin(State Grid Yantai Power Supply Company, Yantai 264000, China)
出处
《山东电力技术》
2018年第7期73-77,共5页
Shandong Electric Power
关键词
开关柜
局部放电
暂态地电压
超声波
特高频
switchgear
partial discharge
transient earth voltage
ultrasound
ultrahigh frequency
