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TitleEffects of geomagnetic storms on power systems and other ground technological infrastructure
AuthorBoteler, D HORCID logo; Trichtchenko, LORCID logo; Pirjola, RORCID logo
SourceProceedings of the VII International Symposium EMC 2007; 2007 p. 1-4
Alt SeriesEarth Sciences Sector, Contribution Series 20100354
MeetingVII International Symposium EMC 2007; St Petersburg; RU; June 26-29, 2007
File formatpdf
Subjectsgeophysics; extraterrestrial geology; geomagnetism; geomagnetic variations; geomagnetic fields; magnetic storms; electric power
Illustrationsschematic diagrams
AbstractThe magnetic field at the Earth's surface can change rapidly due to electric currents produced in the ionosphere and above as a response to solar eruptions. These magnetic field variations induce electric currents in the Earth and in man-made conductors at the Earth's surface, causing a variety of problems in the operation of technological infrastructure. There are many accounts of induced currents in the telegraph system interfering with the transmission of messages. Effects of induced currents still have to be considered in the design of the power supply for modern submarine cables. Pipelines are another system using long conductors and geomagnetic induction creates variations in the pipeline voltage that reduce the efficiency of cathodic protection systems designed to prevent corrosion of the pipeline. In power systems, currents induced in the transmission lines flow to ground through transformers causing overheating, distortion of the AC waveform and increased power use. In extreme cases, as in the magnetic storm of March 1989, this can damage transformers and cause power blackouts. Such events produce economic losses for the power companies and affected industries.

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