关于110kV CVT现场试验方法的探讨

电容式电压互感器(CVT),具备电磁式电压互感器的一切功能,与电磁式电压互感器相比,多了载波、绝缘强度高等优点。本文对110 kV电容式电压互感器的结构原理进行了简要介绍,主要对其试验中电容和介损、极性测量等测试的方法进行了探讨,并指出与现行测试方法的差异处,然后进行分析比较,为CVT的试验特别是中压端子无引出抽头的CVT试验提供了更多符合现场试验安全要求的方法。

Discussion on Field Test Method of 110 kV CVT

Capacitor voltage transformer possesses all functions of electromagnetic type voltage transformer and,compared to the later,has such advantages as carrier and high dielectric strength.In this paper,the structural principle of 110 kV capacitor voltage transformer is introduced,the test method for medium loss and capacitance test and polarity etc.are discussed.The difference with existing test method are pointed out,then analyzed and compared,which provides more methods complying with safety requirement of field test to the test of CVT,especially to the test of CVT with medium voltage terminal without lead out tap.