Abstract
Aiming at the accuracy of frequency measurement algorithms in power systems, this paper proposes a new high-precision Fourier frequency measurement algorithm based on modified sampling sequence. Through the improvement of the traditional Fourier algorithm, the theoretical error of the traditional algorithm is eliminated and the speed of the algorithm is improved. By modifying the sampling sequence and iterative methods, the original sampling sequence is as close to the ideal sequence as possible, so that the sampling frequency and the fundamental frequency of the system tend to be synchronized, thereby reducing the problem of spectrum leakage and the fence effect. Through simulation analysis, the algorithm effectively improves the frequency measurement accuracy.
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