Advances in Radio Science
Advances in Radio Science
ARS
Articles | Volume 23
Articles | Volume 23
https://doi.org/10.5194/ars-23-33-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ars-23-33-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23
18 Aug 2025
 | 18 Aug 2025

Metrological Approach for Identifying Abnormalities and the Causes of Harmonics in Electrical Power Grids using Wavelets

Helge Lorenzen, Sebastian Koj, and Saba Mylvaganam

Cited articles

Diedrichs, V., Kasdorf, F., and Lorenzen, H.: Propagation of voltage influences, in: Propagation of power quality impacts in distribution grids, Final Report, funding code 0329855A, https://enargus.de/pub/bscw.cgi/?op=enargus.eps2&q=Jade%20Hochschule%20Wilhelmshaven/Oldenburg/Elsfleth%20-%20Standort%20Wilhelmshaven%20-%20Fachbereich%20Elektronik%20-%20Labor%20f%c3%bcr%20Elektrische%20Energieversorgung/Labor%20f%c3%bcr%20Leistungselektronik%20und%20EMV&m=1&v=10&id=855319 (last access: 11 August 2025), 2002. a
DIN EN 50160: Voltage characteristics of electricity supplied by public electricity networks, Beuth Verlag GmbH, https://doi.org/10.31030/3187943, 2020. a, b
Fugal, D. L.: Conceptual wavelets in digital signal processing, Space and Signals Technologies LLC, ISBN 978-0-9821994-5-9, 2009.  a, b, c, d, e, f, g
IEC 60909-0: Short-circuit currents in three-phase a.c. systems – Part 0: Calculation of currents, IEC, ISBN 9782832231586, 2016. a
IEC 61000-4-30: Electromagnetic compatibility (EMC) – Part 4-30: Testing and measurement techniques – Power quality measurement methods, IEC, ISBN 9782832295380, 2021. a
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Short summary
This work shows that continuous wavelet transformation (CWT) is very useful for analyzing transient abnormalities in energy grids. Scalograms are used to visualize the results. It is demonstrated that the family of complex wavelets can be used to analyze the transfer of active power in the power system, even during transient events. This can be used to analyze resonant power grid structures and to identify the causes of violations of current and voltage limits at the grid connection point.
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