International Survey on Voltage Harmonic Unbalance in Low Voltage Networks

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This paper presents the analysis of the unbalance in voltage harmonics in low voltage networks. Data from 55 locations from 12 countries have been analysed to study the voltage harmonic unbalance. The locations are classified as industrial, commercial, residential and mix depending on the type of loads. Unbalance is calculated using individual and aggregated unbalance indices. The analysis has shown that the unbalance is present not only in fundamental voltage but also in harmonic voltages and is observed to be highest for triplen harmonics. Also, unbalance increases with the harmonic order. The survey suggests that while performing harmonic studies, unbalance in the harmonics should also be considered to have realistic results.


Original languageEnglish
Title of host publication2022 20th International Conference on Harmonics & Quality of Power (ICHQP)
Number of pages6
ISBN (print)978-1-6654-1640-5
Publication statusPublished - 1 Jun 2022

Publication series

SeriesInternational Conference on Harmonics and Quality of Power


Title2022 20th International Conference on Harmonics & Quality of Power (ICHQP)
Duration29 May - 1 June 2022
LocationNaples, Italy

External IDs

Scopus 85133795591
ORCID /0000-0002-7465-5750/work/142237850



  • Low voltage, Voltage, Immunity testing, Harmonic analysis, Transformers, Distortion, Harmonic distortion

Library keywords