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The fast Fourier transform (FFT) is the most commonly used technique in power systems signals analysis. However, it is known that if the signal is not synchronized or in the presence of interharmonics, the spectral leakage may occur. To overcome this issue, several techniques are found in literature. The present paper will show a comparison between results of calculating the IEC 61000-4-7 harmonics...
This paper proposes a direct approach based on Principal Curves for power quality disturbance detection. The main advantages of the method lie in its low computational burden in the operational phase, its capability to detect disturbances when power frequency is time-varying and its good performance to signals exhibiting high noise levels. Simulation and experimental results show that the proposed...
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