基于短时傅里叶变换的电子式电流互感器在线校正研究  

Research on Online Correction of Electronic Current Transformers Based on Short-Time Fourier Transform

作　　者：潘勇旭 PAN Yongxu(Southern Engineering Co.,Ltd.,China Railway Construction Electrification Bureau Group,Wuhan,Hubei 430074,China)

机构地区：[1]中铁建电气化局集团南方工程有限公司,湖北武汉430074

出　　处：《自动化应用》2024年第21期118-120,共3页Automation Application

摘　　要：受环境温度、电磁干扰等因素的影响,电子式电流互感器在实际运行中会产生误差,为此,研究基于短时傅里叶变换的电子式电流互感器在线校正方法。通过短时傅里叶变换分析电子式电流互感器输出信号,评估出互感器测量误差,根据互感器误差频谱图自动校正输出信号的幅值与相位,实现电子式电流互感器误差的在线校正。结果表明,经过设计方法校正后,电子式电流互感器的幅值与相角测量误差显著减小,该方法可以有效提升互感器测量精度。Due to the influence of environmental temperature,electromagnetic interference and other factors,electronic current transformers will have errors in actual operation.Therefore,the online correction method of electronic current transformers based on short-time fourier transform is studied.The output signal of the electronic current transformer is analyzed by short-time fourier transform,the measurement error of the transformer is evaluated,and the amplitude and phase of the output signal are automatically corrected according to the error spectrum of the transformer to realize the online error correction of the electronic current transformer.The results show that after the correction of the designed method,the amplitude and phase measurement errors of the electronic current transformer are significantly reduced,and this method can effectively improve the measurement accuracy of the transformer.

关 键 词：短时傅里叶变换 电子式电流互感器 互感器误差 误差校正 在线校正 

分 类 号：TM451.2[电气工程—电器]