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在整周期采样的FFT算法的基础上 ,提出了确定基波周期的总谐波畸变 (THD)最小的方法 ,并作了误差分析。实际应用证明 ,该方法用于工频信号的谐波分析 ,可有效降低测量误差
Based on the FFT algorithm of the whole period sampling, a method of determining the minimum total harmonic distortion (THD) of the fundamental period is proposed and the error analysis is made. Practical application shows that this method is suitable for the harmonic analysis of power frequency signal, which can effectively reduce the measurement error