Low Frequency Currents Source Identification

Philipp Schachinger*, Dennis Albert, Herwig Renner

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


Low frequency currents (LFC) in transformer neutral points can lead to disturbances in high voltage grids. Half-cycle saturation of transformers, caused by LFCs, results in increased audible sound, voltage distortions and led in the past even to blackouts. The main source of LFCs are changes in the Earth’s geomagnetic field, caused by solar storms. However, LFC measurements reveal additional man-made causes as well. In this paper, two known sources of LFCs are discussed briefly and a new source is introduced and documented by combining neutral point measurements and phasor measurements in the Austrian power grid.
Original languageEnglish
Title of host publication2022 20th International Conference on Harmonics & Quality of Power (ICHQP)
Subtitle of host publicationPower Quality in the Energy Transition
Number of pages6
ISBN (Electronic)9781665416399
Publication statusPublished - 30 May 2022
Event20th International Conference on Harmonics and Quality of Power: Power Quality in the Energy Transition - University of Naples “Federico II”, Neapel, Italy
Duration: 29 May 20221 Jun 2022


Conference20th International Conference on Harmonics and Quality of Power
Abbreviated titleICHQP 2022
Internet address

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fields of Expertise

  • Sustainable Systems


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