用于电网谐波分析的自适应整周期采样算法

Application of a Self-adaptive Integral Period Sampling Calculation to Network Harmonic Analysis

分析推导了非整周期采样时FFT泄漏误差的解析估计公式，得出了在输入信号含基波和高次谐波分量的情况下，利用FFT迭代计算来实现自适应整周期采样的一种新算法。仿真计算表明，该算法能有效地减少泄漏误差。

An Analytic estimative formula of FFT leakage error for non-integral period sampling is analyzed and derived and in the case of the input signal including fundamental wave and higher harmonics,a new calculating method of realizing the self-adaptive Integral period sampling with FFT iterative calculation is obtained.The emulative calculation shows that the calculation can effectively reduce leakage error.