广东电力2016，Vol.29Issue(3)：61-66,6.DOI:10.3969/j.issn.1007-290X.2016.03.012
基于加窗插值 FFT 算法的低频振荡模式分析
Analysis on Low Frequency Oscillation Mode Based on Windows and Interpolated FFT
陈远周 1杨芳1
作者信息
- 1. 广东电网有限责任公司清远供电局，广东 清远 511500
- 折叠
摘要
Abstract
Aiming at the problem that low frequency oscillation of the power system has affected security and stability of the power grid,a kind of mode analysis method based on windows and interpolated fast Fourier transform (FFT)is proposed. This method uses Hamming for weighted analysis on low frequency oscillation signals so as to reduce frequency spectrum leakage of FFT algorithm,and by comparing two successive differencesof spectral component amplitudes,it can confirm modal damping factors. Double spectral lines interpolation algorithm is used for reducing influence of picket fence effect and polynomial approximation is used to solve frequency of the dominant mode. Simulation results indicate that this method is a-ble to effectively analyze parameters of the dominant mode of low frequency oscillation which is of less calculated amount and has better robustness on signals containing white noise.关键词
低频振荡/频谱分析/快速傅里叶变换/窗函数Key words
low frequency oscillation/frequency spectrum analysis/fast Fourier transform (FFT)/window function分类
动力与电气工程引用本文复制引用
陈远周,杨芳..基于加窗插值 FFT 算法的低频振荡模式分析[J].广东电力,2016,29(3):61-66,6.
