非同步采样对电力系统谐波分析精度影响的仿真研究

The Emulate Study of the Influence of Accuracy for Harmonic Analysis in the Electric Power System under Asynchronous Sampling

分析了离散傅立叶变换中存在的频谱泄露和栅栏效应 ,介绍了用于电力系统谐波分析的高精度加窗插值FFT算法 。

The leakage of frequency pedigree and fence effect in the Discrete Fourier Transform are firstly analyzed,and then the interpolation FFT algorithm on windows with high accuracy is introduced,and last the influence of the accuracy for the interpolation FFT algorithm under asynchronous sampling is studied with the help of MATLAB.