Transfer of Supraharmonics Through a MV/LV Transformer

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In this research, the transfer of supraharmonic (SH) distortions through a transformer from the low-voltage (LV) to the medium-voltage (MV) and from the MV to (another) LV grid is studied, based on measurements on both voltage levels in a laboratory installation with 3 transformers ≥ 1 MVA. SH currents are injected using an SH emitting device. It is found that SH distortions propagate with a ratio between 0.03 and 1.0 from LV to MV and that some of the components propagate more easily, probably due to resonances. From MV to LV the transfer ratio is between 0.5 and 3.0, and some components are amplified. The results show that supraharmonics can propagate through transformers and that the possibility of interference with other LV installations exists.
Original languageEnglish
Title of host publication27th International Conference on Electricity Distribution (CIRED 2023)
PublisherInstitution of Engineering and Technology (IET)
Number of pages5
ISBN (Electronic)978-1-83953-855-1
Publication statusPublished - 29 Sept 2023
Event27th International Conference on Electricity Distribution (CIRED 2023) - Rome, Italy
Duration: 12 Jun 202315 Jun 2023

Publication series

NameIET Conference Proceedings


Conference27th International Conference on Electricity Distribution (CIRED 2023)


This research is part of the project TEPQEV and supported by Topsector Energy-subsidy of the Dutch Ministry of Economic Affairs and Climate. The authors would like to thank the colleagues from the High Power Laboratories of KEMA Labs, for facilitating the high-voltage measurement equipment and enabling access to measurement locations.

FundersFunder number
Ministerie van Economische Zaken en Klimaat


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