Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 29, Issue 4, Pages 1886-1893Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2014.2317851
Keywords
Electric field; geomagnetically induced currents (GICs); geomagnetism; magnetic field
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The relationship between the changes in the earth's magnetic field and the induced geoelectric field during a geomagnetic storm is a frequency-dependent transfer function that depends on earth resistivity at different depths. Taking into account geological variations over the route of transmission circuits has a significant influence on the induced geoelectric fields as well as on the distribution of geomagnetically induced current (GIC) over a geographically large network. This paper summarizes and compares the results of time-domain and steady-state GIC simulations using laterally uniform and piecewise layered-earth models.
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