CAJ | 학술논문

变电站高压互感器体积大、电压高，不便于运回实验室检定，基本上采取现场检定的方法。文章介绍了河南省在500kV CT（Current transformer,电流互感器）现场校验存在的问题，还介绍了CT的小信号测试技术，及采用了变频技术结合数字化处理、软件抗干扰处理的CT小信号测试设备的实现方式。从实验室及现场两个方面进行验证，情况表明采用此设备在强干扰情况下测试数据稳定、可靠，满足500kV电站CT的现场测试需求，大大提高CT现场检验工作效率。
변전참고압호감기체적대、전압고，불편우운회실험실검정，기본상채취현장검정적방법。문장개소료하남성재500kV CT（Current transformer,전류호감기）현장교험존재적문제，환개소료CT적소신호측시기술，급채용료변빈기술결합수자화처리、연건항간우처리적CT소신호측시설비적실현방식。종실험실급현장량개방면진행험증，정황표명채용차설비재강간우정황하측시수거은정、가고，만족500kV전참CT적현장측시수구，대대제고CT현장검험공작효솔。
Substation high-voltage transformer is usually tested in field, for the large bulk and high voltage makes it difficult to be taken to laboratory for test. The problem of error test of 500kV CT in field in Henan province is discussed. The theory of CT error test is introduced via error characteristics simulation. The method of CT error tester takes use of frequency conversion, digital processing methods and software anti-interference. Test results of CT error tester in lab and field prove the stabilization and reliability and show that it meets the test requirement of CT of 500kV substation so as to improve the efficiency of CT error test in field.