Voltage Flicker Detection Method Based on Teager Operator

Abstract

Fast and accurately detection of voltage fluctuation components is very important to voltage flicker measurement. A novel voltage flicker demodulation algorithm based on Teager operator is proposed in this paper. The principle of the Teager operator demodulation approach is introduced, and the mathematical derivation of the proposed algorithm is described. The proposed algorithm is fast and requires only a few samples to calculates, therefore, it has excellent time resolution. The simulation results prove that the new algorithm can track the flicker signal of unifrequency or multifrequency amplitude modulation wave successfully. The comparison result of proposed method, the square demodulation method and the Hilbert transform demodulation method shows that the proposed method has obvious advantages of calculation speed and detection accuracy.