摘要
采用FFT对电力系统谐波进行分析时,由于非同步采样造成了频谱泄漏,直接影响谐波分析的结果.本文分析了FFT的泄漏原因,详细阐述了几种常用余弦组合窗的特性,对比了加Hanning窗、Blackman窗和Blackman-Harris窗对电力系统谐波分析的效果,仿真结果表明加Blackman-Harris窗时谐波分析效果更好.采用加Blackman-Harris窗插值修正算法,并通过改变相关参数进一步提高了测量结果精度.
During the harmonic analysis of power systems in terms of FFT algorithm, non-synchro- nous sampling leads to spectrum leakage, which directly influences the analysis results. In this pa- per, the reasons for the spectrum leakage are analyzed, the characteristics of several commonly used cosine combination windows are elaborated and the effects of the combination of Hanning and Blackman-Harris windows on the harmonic analysis of power systems are compared , Blackman The simula- tion results show that the interpolation algorithm with Blackman-Harris window is more accurate. U- sing interpolation correction algorithm of the combination Blackman-Harris window, more accurate results can be obtained with an appropriate selection of the calculation parameters.
作者
唐宁
苏建霞
王妍萍
刘跃
TANG Ning;SU Jian-xia;WANG Yan-ping;LIU Yue(School of Information Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China;Institute of Electrical and Mechanical, China Textile Academy, Beijing 100025, China)
出处
《北京服装学院学报（自然科学版）》
CAS
北大核心
2017年第4期83-88,共6页
Journal of Beijing Institute of Fashion Technology：Natural Science Edition
关键词
电力系统
谐波分析
FFT
窗函数
插值算法
power system
harmonic analysis
FFT algorithm
window function
interpolation
