Rapid prediction of electric fields associated with geomagnetically induced currents in the presence of three‐dimensional ground structure: Projection of remote magnetic observatory data through magnetotelluric impedance tensors
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DOI: 10.1002/2016sw001535
Abstract: Ground level electric fields arising from geomagnetic disturbances (GMDs) are used by the electric power industry to calculate geomagnetically induced currents (GICs) in the power grid. Current industry practice is limited to electric fields associated… read more here.
Keywords: ground; impedance tensors; electric fields; induced currents ... See more keywords
Influences of various magnetospheric and ionospheric current systems on geomagnetically induced currents around the world
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DOI: 10.1002/2016sw001566
Abstract: Ground-based observations of geomagnetic field (B field) are usually a superposition of signatures from different source current systems in the magnetosphere and ionosphere. Fluctuating B fields generate geoelectric fields (E fields), which drive geomagnetically induced… read more here.
Keywords: field; influences various; induced currents; geomagnetically induced ... See more keywords
Multifractal analysis of geomagnetically induced currents using wavelet leaders
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DOI: 10.1016/j.jappgeo.2019.103920
Abstract: Abstract The sun is constantly emitting electrons and ions as a magnetized plasma, forming the solar wind and carrying with it the sun's rotating magnetic field. The solar wind subsequently interacts with Earth's magnetosphere and… read more here.
Keywords: multifractal analysis; induced currents; geomagnetically induced; wavelet ... See more keywords
Geomagnetically Induced Current Model Validation From New Zealand's South Island
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DOI: 10.1029/2020sw002494
Abstract: Geomagnetically induced currents (GICs) during a space weather event have previously caused transformer damage in New Zealand. During the 2015 St. Patrick's Day Storm, Transpower NZ Ltd has reliable GIC measurements at 23 different transformers… read more here.
Keywords: zealand south; geomagnetically induced; new zealand; model ... See more keywords
Measurements and Simulations of the Geomagnetically Induced Currents in Low‐Latitude Power Networks During Geomagnetic Storms
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DOI: 10.1029/2020sw002549
Abstract: The issue of geomagnetically induced currents (GICs) on large distance ground‐based conductive systems is a global space weather concern nowadays. The low‐latitude power grids are becoming more vulnerable to GICs hazards due to their increasing… read more here.
Keywords: latitude power; geomagnetically induced; induced currents; geomagnetic storms ... See more keywords
Wavelet and Network Analysis of Magnetic Field Variation and Geomagnetically Induced Currents During Large Storms
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DOI: 10.1029/2021sw002772
Abstract: During geomagnetic storms rapid magnetic variations cause large, sharp enhancements of the magnetic and geoelectric field at mid‐latitudes. These present a potential hazard to grounded technology such as high voltage transformers, pipelines and railway systems.… read more here.
Keywords: field; geomagnetically induced; large storms; induced currents ... See more keywords
Proximity Effects of Lateral Conductivity Variations on Geomagnetically Induced Electric Fields
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DOI: 10.1109/access.2018.2889461
Abstract: During a magnetic storm, the induced geoelectric field drives geomagnetically induced currents (GIC) in power transmission networks, railway systems, and pipelines, negatively affecting these systems. In regions with complex geological structures, the lateral earth conductivity… read more here.
Keywords: field; geomagnetically induced; conductivity changes; discontinuity ... See more keywords
Effects of Lateral Conductivity Variations on Geomagnetically Induced Currents: H-Polarization
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DOI: 10.1109/access.2018.2889462
Abstract: H-polarization, along with E-polarization, indicates the lateral variations of the Earth conductivity, which influence the induced electric field distribution. The coast effect is a typical H-polarization phenomenon that causes local geoelectric field enhancement in coastal… read more here.
Keywords: field; geomagnetically induced; induced currents; power ... See more keywords
Geomagnetically Induced Currents: Frequency spectra and threats to voltage stability
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DOI: 10.1109/access.2022.3182237
Abstract: Geomagnetically Induced Currents (GICs) are induced after a complex interaction between the sun and earth’s magnetic field. GICs may cripple power systems leading to voltage collapse and a drop in power quality. While the commonly-used… read more here.
Keywords: voltage stability; frequency; power; geomagnetically induced ... See more keywords
Geomagnetically Induced Current Analysis in Malaysian Power Transmission System
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DOI: 10.1109/access.2022.3215266
Abstract: For many decades, Geomagnetically Induced Current (GIC) has posed a significant risk over the electrical power grid infrastructures worldwide. The phenomenon occurs due to geomagnetic disturbance (GMD) and related space weather events arising from solar… read more here.
Keywords: system; network; malaysian power; power ... See more keywords
Experimentally Validated Extended Kalman Filter Approach for Geomagnetically Induced Current Measurement
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DOI: 10.1109/tie.2021.3094488
Abstract: Geomagnetically induced currents (GICs) are referred to as the quasi-dc current flows in power networks, driven by complex space weather-related phenomena. Such currents are a potential threat to the power delivery capability of electrical grids.… read more here.
Keywords: geomagnetically induced; kalman filter; approach; power ... See more keywords