【摘要】 快速傅里叶变换(FFT)算法被广泛应用于电力系统谐波检测,但频谱泄漏、栅栏效应一直是影响测量准确性的重要因素,为此提出了一种FFT加窗插值算法.通过加窗函数、插值修正函数,对FFT算法进行优化,并利用谐波分析的试验实例进行了验证,计算结果表明:加窗加插值FFT算法,可以提高谐波检测精度,达到测量要求,满足电力系统谐波检测需求.更多还原

【Abstract】 Fast Fourier transform(FFT)algorithm has been widely used in the detection of power system harmonic.But the spectral leakage and fence effect have always been the key factor of influencing the accuracy of measurement.The paper proposes FFT windowed interpolation algorithm,which not only optimizes the FFT algorithm by adding window function and interpolation correction function,but also verifies the harmonic analysis.The computing result shows that the FFT algorithm based on windowed interpolation algorithm can improve the accuracy of harmonic detection and meet the requirements of measurement and electrical system harmonic detection requirement.更多还原