基于离散傅里叶变换计算介质损耗因数的二周期修正法

J4 ›› 2012, Vol. 50 ›› Issue (02): 328-332.

基于离散傅里叶变换计算介质损耗因数的二周期修正法

徐智博¹, 李宝华¹, 金承业^2

1. 吉林大学电子科学与工程学院, |长春 130012|2. 吉林省乐金电子有限公司, |长春 130062

收稿日期:2011-05-10 出版日期:2012-03-26 发布日期:2012-03-21
通讯作者: 李宝华 E-mail:libh@jlu.edu.cn

Two-Cycle Melioration Algorithm of |Calculating Dielectric Dissipation Factor Based on DFT

XU Zhi bo¹, LI Bao hua¹, JIN Cheng ye²

1. College of |Electronic Science and Engineering, Jilin University, Changchun 130012, China;
2. Jilin Province Lejin Electronic Co.Ltd., Changchun 130062, China

Received:2011-05-10 Online:2012-03-26 Published:2012-03-21
Contact: LI Bao hua E-mail:libh@jlu.edu.cn

摘要/Abstract

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.

关键词: 离散傅里叶变换, 介质损耗因数, 二周期修正法

Abstract:

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.

Key words: discrete Fourier transform (DFT), dielectric dissipation factor; , two-cycle melioration algorithm

中图分类号:

O411

徐智博, 李宝华, 金承业. 基于离散傅里叶变换计算介质损耗因数的二周期修正法[J]. J4, 2012, 50(02): 328-332.

XU Zhi-Bo, LI Bao-Hua, JIN Cheng-Ye. Two-Cycle Melioration Algorithm of |Calculating Dielectric Dissipation Factor Based on DFT[J]. J4, 2012, 50(02): 328-332.

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