Transfer of Supraharmonics Through a MV/LV Transformer

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Abstract

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)
Pages110-114
Number of pages5
ISBN (Electronic)978-1-83953-855-1
DOIs
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
Number6
Volume2023

Conference

Conference27th International Conference on Electricity Distribution (CIRED 2023)
Country/TerritoryItaly
CityRome
Period12/06/2315/06/23

Funding

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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