摘要
针对一起1 100 kV GIS带电检测案例,阐述了GIS特高频局部放电检测原理和技术优势,分析了便携式局放仪的谱图信息,初步确定缺陷类型,并通过时差定位法对放电源进行了精确定位,查看1 100 kV GIS局部放电在线监测装置,模式识别技术的结果与现场判断一致,验证了现场带电检测的准确性。现场实践表明:特高频局部放电检测技术能有效识别GIS设备缺陷导致的局部放电,及时发现和避免GIS绝缘故障的发生,保障GIS设备的安全稳定运行。
According to a live detection of 1 100 kV GIS, this paper describes the principles and technical advantages of UHF-based GIS partial discharge detection method; in addition, it analyzes the spectrogram information of portable PD analyzer to preliminarily judge the defect type. At last, the discharge source is pre cisely located by means of time difference location method. The result of pattern recognition techniques of 1100 kV GIS partial discharge on-line monitoring system is consistent with the field test, which verifies the accuracy of the on-site live detection. Practice shows that UHF partial discharge detection technique can recognize partial discharge due to GIS defects, and timely discover and prevent GIS insulation faults to ensure the operation security and stability of GIS.
出处
《浙江电力》
2016年第10期32-35,共4页
Zhejiang Electric Power
