一起220 kV CVT失压故障的试验分析

本文通过一起220 kV CVT二次失压故障,介绍了现场故障定位分析、综合判断和试验方法.对故障CVT有针对性地结合在线监测数据、电气试验、绝缘油试验方法进行综合判断,能迅速准确地判断故障的类型和故障部位,使故障获得有效的处理.通过现场检查试验的数据及解体情况,分析了故障原因,并提出了为防止类似故障的发生应采取的措施,同时对电容式电压互感器设备结构和制造工艺提出改进建议.

Test Analysis on Voltage Loss of 220 kV CVT

In this paper, the fault location analysis, comprehensive judgment and test method are in-troduced through one secondary voltage loss fault of a 220 kV capacitor voltage transformer（CVT）. The faulty CVT is specifically judged comprehensively by on-line monitoring data, electrical test and test method of insulation oil so as to determine the fault type and fault location quickly and accurate-ly which makes the effective fault treatment. The reason of the fault is analyzed through specific data of site test and inspection as well as disassembly condition, the measures on preventing such similar fault are raised and improvement suggestions on the manufacture and process of CVT are given.