中国电机工程学报2018，Vol.38Issue(2)：456-464,9.DOI:10.13334/j.0258-8013.pcsee.170772
基于准同步序列重构的非稳态电力谐波分析
Power System Harmonic Analysis Under Non-stationary Situations Based on Quasi-synchronous and Sequence Reconstruction
摘要
Abstract
Focusing on the problem of large measurement error that caused by spectrum leakage in Fourier harmonic analysis of non-stationary power system,a non-stationary power harmonic analysis method based on quasi-synchronous and sequence reconstruction algorithm was proposed.Firstly,the original sampling signal were moved 50Hz in frequency domain,the harmonics were filtering through SF,fundamental frequency was detected under the method of frequency shift and angular difference;and then,cubic B spline was used to reconstruct the original sampling signal;finally,every harmonic component could be accurately determined under the reconstructed quasi-synchronous sequence,which make use of the great performance of suppress spectrum leaks in all-phase FFT.Experiment results show that the proposed algorithm is suitable for the fundamental frequency and harmonics detection in the power system under non-stationary situations,and the feasibility of which is verified by the application in experimental platform.关键词
sinc滤波器/三次B样条/序列重构/移频角差/全相位FFT/谐波分析Key words
sinc filter/cubic B spline/sequence reconstruction/frequency shift and angular difference/all-phase FFT/harmonic analysis分类
信息技术与安全科学引用本文复制引用
邱伟,唐求,唐璐,李建闽,何俊杰..基于准同步序列重构的非稳态电力谐波分析[J].中国电机工程学报,2018,38(2):456-464,9.基金项目
国家自然科学基金项目(51277058,51377049).Project Supported by National Natural Science Foundation of China (51277058,51377049). （51277058,51377049）
