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TitleCalculation of induced electric field during a geomagnetic storm using recursive convolution
AuthorMarti, L; Rezaei-Zare, A; Boteler, D
SourceIEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers) vol. 29, issue 2, 2014 p. 802-807, https://doi.org/10.1109/TPWRD.2013.2273833
Year2014
Alt SeriesEarth Sciences Sector, Contribution Series 20140020
PublisherIEEE
Documentserial
Lang.English
Mediapaper; digital; on-line
File formatpdf
Subjectsgeophysics; electrical properties; geomagnetism; magnetic storms; magnetic field; magnetic field intensity; magnetic induction; conductivity; geoelectric variations; fast Fourier transform (FFT); electric field; geomagnetically induced currents (GIC)
Illustrationsgraphs; tables; equations
ProgramNorthern Canada Geohazards Project, Public Safety Geoscience
AbstractThe relationship between the chnages in the earth's magnetic field and the induced geoelectric field during a geomagnetic disturbance is a frequency dependent transfer function that depends on earth resistivity at different depths. Traditionally this function is calculated in the frequency domain expressed as an impulse function in the time domain using FFT and convolved with dB/dt in the time domain to estimate the geoelectric field E. This paper proposes the approximation of the transfer function in the frequency domain using rational functions and to carry out the calculation of E from dB/dt using fast recursive convolution methods.
Summary(Plain Language Summary, not published)
Space weather refers to the dynamic conditions on the Sun and in the space environment, in particular, in the near-Earth environment, that can affect critical infrastructure. NRCan operates the Canadian Space Weather Forecast Centre and conducts research into space weather effects on power systems, pipelines, satellites, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. This paper shows how recursive convoltion can be used to calculate the geo-electric fields that can be a hazard to power systems.
GEOSCAN ID293895