特高压套管式电流互感器励磁特性测试

为了判断电流互感器的质量以及是否能为保护装置提供正确的信号,笔者对电流互感器进行了励磁特性测试。介绍了在1 000 kV南阳开关站对特高压套管式电流互感器进行励磁特性测试的情况,并对测试结果进行了分析,得出,对于普通的特高压套管式电流互感器,采用传统交流仪表法与采用各种测试仪得到结果一致性较好;对于带暂态保护的TPY套管式电流互感器,在现场可以采用降低电源频率的方法实现测试。

Excitation Characteristics Test of UHV Bushing-type Current Transformer

In order to estimate the quality of current transformer and the ability of providing the correct signal to protection derices,the test of excitation characteristics of current transformer was canied out,and the test of bushing-type current transformer applied in 1 000 kV Ultra High Voltage(UHV for short)system AC Nanyang switch-gear station was introduced.Moreover,the test result has been analyzed.It is concluded that for the ordinary UHV bushing current transformer,the results using the traditional methed are consistent with the results using a variety of tester.For the transient protection of the TPY tube-type current transformer,the test can be achieved by reducing power frequency.