基于现场信号仿真技术的电流互感器误差测试技术研究

Research on current transformer error testing technology based on field signal simulation technology

针对在计量用低压电流互感器的误差检测中,传统测量方法无法模拟现场实际工况的问题,提出一种基于现场信号仿真技术的电流互感器误差测试方法,并采用实验对其进行验证。首先,将基于高速录波技术,所提取的现场实际工况波形及特征信号,进行数字化分解;然后,利用程控电压源与程控电子负载,搭建信号仿真测试平台,复现现场工况波形,对被试电流互感器进行误差测试,并分解、整理所用波形,形成电流互感器运行误差测试波形库。最后,利用波形库中特征波形,对电流互感器进行误差检测。

In order to solve the problem that the traditional measurement method cannot simulate the actual working condition in the measurement of low-voltage current transformer error detection,a current transformer error test method based on the field signal simulation technology is proposed and verified by experiments.Firstly,based on the high-speed recording wave technology,the actual working condition waveform and characteristic signal are digitally decomposed.Then,the program-controlled voltage source and program-controlled electronic load are used to build the signal simulation test platform to reproduce the field working condition waveform,and the error test of the tested current transformer is carried out,and the used waveform is decomposed and sorted to form the current transformer operation error test waveform library.Finally,the current transformer error could be detected through using the characteristic waveform in the waveform library.