电测与仪表2016，Vol.53Issue(20)：15-19,5.
双向牛顿插值的电力系统谐波分析方法
Bidirectional newton interpolation analysis method for harmonics in power system
陈文娟 1熊纽 1谭甜源 1刘开培 1张俊敏2
作者信息
- 1. 武汉大学电气工程学院，武汉430072
- 2. 中南民族大学计算机科学学院，武汉430072
- 折叠
摘要
Abstract
In the harmonic analysis of power system , the accuracy is badly influenced by spectral leakage and fence effect during FFT transform .The current analysis method of windowed FFT interpolation can suppress the spectral leakage to a certain degree , but it has a complex interpolation formula , meanwhile , different frequency components have mutual interference damaging the effect of harmonic analysis .This paper presents a bidirectional Newton interpo-lation method which can synchronize the sampling sequence .In the case of asynchronous sampling , positive Newton interpolation is used to calculate the primitive period of periodic signal , and then setting new interpolation points ac-cording to the calculation of the period , the signal amplitude can be calculated by using the reverse Newton interpola-tion.The adjusted sequence is approximately like the acquired sample sequence under synchronous sampling condi -tion, so that can effectively reduce the spectral leakage during fast Fourier transform .The simulation results show that, the method can solve the leakage of spectrum , and its harmonic detection has a higher precision compared with harmonic analysis method of classic window function interpolation .关键词
双向牛顿插值/快速傅里叶变换/谐波检测Key words
bidirection Newton interpolation/fast Fourier transform/harmonic detection分类
信息技术与安全科学引用本文复制引用
陈文娟,熊纽,谭甜源,刘开培,张俊敏..双向牛顿插值的电力系统谐波分析方法[J].电测与仪表,2016,53(20):15-19,5.
