相对介损检测在一起220 kV电压互感器绝缘缺陷中应用
林忠立，王腾滨
(国网福建省电力有限公司检修分公司，福建 福州 350000)
摘 要：针对一起某变电站 220 kV 电容式电压互感器 (CVT) 相对介损带电测试数据超标、红外测温异常的情况。检测人员停电试验发现 CVT 电容单元数据超标，经设备进行解体后检查发现，电容单元部分电容芯子存在铝箔断裂和绝缘击穿故障，证明相对介损测试是一种有效的在容性设备绝缘状态带电检测手段。
关键词：相对介损；容性设备；带电检测；电压互感器
中图分类号：TM451+.2 ；TM835.4 文献标识码：B 文章编号：1007-3175(2021)09-0047-03
Application of Relative Dielectric Loss Detection in 220 kV
Voltage Transformer Insulation Defects
LIN Zhong-li, WANG Teng-bin
（Maintenance Company of State Grid Fujian Electric Power Co., Ltd , Fuzhou 350000, China）
Abstract: There was an accidental situation in the relative dielectric loss live test of the 220 kV capacitive voltage transformer (CVT). The test showed excessive data and abnormal infrared temperature. The power outage test found that the data of the CVT capacitor unit exceeded the standard. This study examined the disassembled equipment, and there were existing fault symptoms of some capacitor cores of the capacitor unit that had aluminum foil fracture and insulation breakdown. Therefore, in the insulation condition of capacitive equipment, the relative dielectric loss test is a valid electric measure.
Key words: relative dielectric loss; capacitive equipment; live detection; voltage transformer
参考文献
[1] 国家电网公司运维检修部. 输变电设备状态检修试验规程：Q/GDW 1168—2013[S]. 北京：中国电力出版社，2013 ：19-20.
