220kV电容式电压互感器试验方法探讨

A Test Method for 220kV Capacitive Voltage Transformer

在不拆线的条件下,为了准确测量CVT的电容量和介损,笔者结合现场测试实例,采用AI6000C型变频介损电桥,对整体测量一次无中间抽头高分压比电容式电压互感器的试验方法进行分析,得出了用整体测试CVTC1、C2串联后的总电容和介损的方法来判断CVT的好坏是不科学的,并提出了采用自激法分别测量220kVCVT的C1、C2电容及介损的具体方法。

In order to accurately measure capacitance and dielectric loss of a capacitive voltage transformer without disconnection, the author adopted a AI6000C dielectric loss bridge to analyze the testing methods for whole measurement without intermediate tap of a high voltage ratio CVT, It is concluded that taking the whole measure of CVT＇s total capacitance and dielectric loss of C1,C2 in series to judge CVT is unscientific, Some specific methods are put forward to measure the C1,C2 capacitance and dielectric loss of 220kV CVT respectively by using the method of self-excitation .