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Geomagnetically induced currents in a Norwegian transformer station

Abstract

This report considers measurements of geomagnetically induced current (GIC) and comparison to recorded variations in the geomagnetic field (dB/dt). The GIC-sensors were installed in the neutral point of a 420 kV transformer located in
Mid-Norway in 2019. The magnetometers (for dB/dt) are also located in Mid-Norway, but at another location. Recordings up to December 2021 are presented in this report. The
maximum recorded GIC and dB/dt was about +/- 60 A and 14 nT/s, respectively. From linear regression, GIC is approximated to 3 times dB/dt, where GIC is measured in
amps and dB/dt in nT/s. GIC is always lower than 7 times dB/dt based on the dataset with day-max values (699 points).

Category

Report

Language

English

Author(s)

Affiliation

  • SINTEF Energy Research / Elkraftteknologi
  • SINTEF Energy Research / Energisystemer
  • UiT The Arctic University of Norway

Year

2022

Publisher

SINTEF Energi AS

Issue

2021:01449

ISBN

978-82-14-07705-6

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