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. 2020 May 21;20(10):2912. doi: 10.3390/s20102912

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Spectral analysis of the electricity demand Intrinsic Mode Functions (IMFs), using Discrete Fourier Transform. Peak frequencies (red circle) and spectrum centroid (dashed green line) are marked.