文档介绍：第 32 卷第 25 期中国电机工程学报 , 2012
182 2012 年 9 月 5 日 Proceedings of the CSEE ©2012 .
文章编号:0258-8013 (2012) 25-0182-07 中图分类号:TM 71 文献标志码:A 学科分类号:470·40
电力系统谐波分析的多层 DFT 插值校正法
刘亚梅,惠锦,杨洪耕
(四川大学电气信息学院,四川省成都市 610065)

Multilayer DFT Interpolation Correction Approach for Power System Harmonic Analysis
LIU Yamei, HUI Jin, YANG Honggeng
(School of Electrical Engineering & Information, Sichuan University, Chengdu 610065, Sichuan Province, China)
ABSTRACT: Discrete Fourier transformer is the most basic 例表明,该方法能够在非整周期采样的条件下实现电力系统
mathematical tool for spectrum analysis of a stable electrical 谐波信号的高精度测量,也从另一个角度改进了传统的加窗
signal, which is also the transformation approach 插值算法。
mended by International Electro-mission
关键词:电能质量;谐波分析;间谐波分析;离散傅里叶变
for harmonic and interharmonic measurement. However, when
换;快速傅里叶变换
the analysis window width does not correspond to the actual
signal period, spectral interferences among different tones 0 引言
would take place by using the above method, thus making the
离散傅里叶变换,
analysis accuracy deteriorated. To address this problem, this (discrete Fourier transform
paper proposed a multilayer interpolation correction approach DFT)及其快速算法,快速傅里叶变换(fast Fourier
based on cosine windows for power system harmonic analysis. transform,FFT),由于其计算方法简单,物理意义明
This method uses the phase features of the spe