摘要
提出一种基于离散傅里叶变换的二周期修正法,利用该方法可计算电力系统的介质损耗因数.通过将电网信号两个周期的采样修正为一个周期,可减小由频率偏移导致的频谱泄露和截断误差.误差分析表明,该算法与传统方法(加窗法)的精度具有相同的数量级,但其运算时间比传统方法运算时间减小3倍以上.
A two-cycle melioration algorithm based on discrete Fourier transform（DFT） was presented.This method can be used to calculate the dielectric dissipation factor of electric power system.The frequency spectrum leaking and the error of truncation caused by frequency deviation can be reduced by means of amending two periods of the grid signal into one period.Error analysis shows that the accuracy of this algorithm is the same as that of traditional solutions（adding window method）,but the operation time of this method is 3 times less than those of the traditional solutions.
出处
《吉林大学学报（理学版）》
CAS
CSCD
北大核心
2012年第2期328-332,共5页
Journal of Jilin University:Science Edition
基金
国家自然科学基金(批准号:61177025)
关键词
离散傅里叶变换
介质损耗因数
二周期修正法
discrete Fourier transform（DFT）
dielectric dissipation factor
two-cycle melioration algorithm
