Case study of the Geomagnetically Induced Currents (GICs) along a hypothetical overhead Aluminum Conductor Steel Reinforced (ACSR) during active geomagnetic storms in Egypt

Document Type : Original Article

Authors

1 Department of physics, faculty of science, Helwan University, Cairo, Egypt

2 Department of Geomagnetism, The National Research Institute of Astronomy and Geophysics (NRIAG), Cairo, Egypt

3 department of physics, faculty of science, Helwan University, Cairo, Egypt

4 Basic and applied science department, faculty of engineering, Egypt-Japan University of science and technology, Alexandria, Egypt

Abstract

So many studies are made on Geomagnetically Induced Currents (GICs) around the world. Most of these studies are made in polar and equatorial latitudes due to the high intensity of GICs observed there, which are enhanced by the auroral and equatorial electrojet currents during geomagnetic storms. In this study we are going to perform our analysis at the lower latitude specifically in Egypt at periods of maximum activity of solar cycle 24. Using magnetic field data from Misallat geomagnetic station we studied the variations in the magnetic field H component in Misallat (MLT) and compared them with other stations in lower latitudes upon data availability. In most of the studied storms the maximum (dH/dt) values coincide with the Storm Sudden Commencement (SSC), while some storms have their maximum (dH/dt) during the main phase of the storm. The maximum (dH/dt) at MLT among the whole studied period is found to be 59.4 nT/min on June 22nd,2015. Finally, GIC values are estimated along the ACSR conductors with their varying resistance values showing a maximum value of 423.6 (A.Km) along the 0.0949 (Ω/km) conductor and 21.4 (A.Km) along the 1.8769 (Ω/km) conductor.

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History

  • Receive Date: 15 August 2023
  • Revise Date: 28 September 2023
  • Accept Date: 30 September 2023

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