Fast computation of the geoelectric field using the method of elementary current systems and planar Earth models [PDF]
Annales Geophysicae, 2004 The method of spherical elementary current systems provides an accurate modelling of the horizontal component of the geomagnetic variation field. The interpolated magnetic field is used as input to calculate the horizontal geoelectric field.
A. Viljanen +6 more
doaj +5 more sources
Installation of Induced Current Measurement Systems in Substations and Analysis of GIC Data during Geomagnetic Storms [PDF]
Journal of Astronomy and Space Sciences, 2015 Coronal Mass Ejections (CME), which originate from active regions of the Sun’s surface, e.g., sunspots, result in geomagnetic storms on Earth. The variation of the Earth’s geomagnetic field during such storms induces surface currents that could cause ...
Kyu-Cheol Choi +6 more
doaj +3 more sources
Measurement of geomagnetically induced current (GIC) around Tokyo, Japan [PDF]
Earth, Planets and Space, 2021 AbstractWe need a typical method of directly measuring geomagnetically induced current (GIC) to compare data for estimating a potential risk of power grids caused by GIC. Here, we overview GIC measurement systems that have appeared in published papers, note necessary requirements, report on our equipment, and show several examples of our measurements ...
Shinichi Watari +2 more
openaire +2 more sources
Database of geomagnetically induced currents in the main transmission line “Northern Transit”
Solar-Terrestrial Physics, 2023 Database containing the results of measurements of geomagnetically induced currents (GIC) for the period of 2011 to 2022 in transformer neutrals at three 330 kV substations of the main power transmission lines “Northern Transit” passing through the ...
Selivanov V. N. +4 more
doaj +1 more source
Diagnostics of geomagnetically-induced currents in high-tension electric transmission lines [PDF]
E3S Web of Conferences, 2019 The problem of geomagnetically-induced currents (GIC) effect on electrotechnical systems is topical as long as uninterrupted power distribution is critically important for all the spheres of human activity.
Sivokon Vladimir +2 more
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First-principles modeling of geomagnetically induced electromagnetic fields and currents from upstream solar wind to the surface of the Earth [PDF]
Annales Geophysicae, 2007 Our capability to model the near-space physical phenomena has gradually reached a level enabling module-based first-principles modeling of geomagnetically induced electromagnetic fields and currents from upstream solar wind to the surface of the Earth.
A. Pulkkinen +5 more
doaj +1 more source
Scientific African, 2023 It is well understood that geomagnetically induced currents (GICs) flow through the grounded neutrals of wye-connected transformers, generating harmonic currents that flow along frequency-dependent transmission lines.
David Oyedokun, Pitambar Jankee
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HV Transformer Protection and Stabilization under Geomagnetically Induced Currents
Energies, 2020 This paper presents the results of research related to the issues arising from DC excitation of power transformers due to geomagnetically induced currents (GIC). First, the GIC phenomena and their influence on power system operation are discussed.
Daniel Bejmert +3 more
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Geomagnetically Induced Currents at Middle Latitudes: 1. Quiet‐Time Variability
Space Weather, 2022 Geomagnetically induced currents (GICs) at middle latitudes have received increased attention after reported power grid disruptions due to geomagnetic disturbances. However, quantifying the risk to the electric power grid at middle latitudes is difficult
Adam C. Kellerman +11 more
doaj +1 more source
The Impact of Geomagnetically Produced Negative-Sequence Harmonics on Power Transformers
IEEE Access, 2021 Geomagnetically induced currents (GICs), although small in magnitude, can inflict detrimental effects on power systems. GICs damage transformers, generate unusual harmonics, trip reactive power support equipment, cause protective relays to malfunction ...
Ahmed Abuhussein +1 more
doaj +1 more source