Journal of Sensors and Sensor Systems
Journal of Sensors and Sensor Systems
JSSS
Articles | Volume 15, issue 1
Articles | Volume 15, issue 1
https://doi.org/10.5194/jsss-15-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/jsss-15-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 1
Regular research article
 | 
08 Jan 2026
Regular research article |  | 08 Jan 2026

Detection of geomagnetically induced currents on single phases in power grids using a fiber optic current sensor system

Johannes Mandl, Philipp Trampitsch, Alexander Fröhlich, Reinhard Klambauer, and Alexander Bergmann

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Short summary
Parasitic direct currents in our alternating-current power grid affect the operation of power transformers. In this work, we present a fiber-optic current sensor system designed for the long-term monitoring of such direct currents, especially those arising from solar activity. The sensor demonstrator allows remote data access and sensor operation and was deployed at an electrical substation. For the first time, we show measurements of such currents on single phases of the power grid.
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