Characteristics of the variability of a geomagnetic field for studying the impact of the magnetic storms and substorms on electrical energy systems
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There are numerous models of geomagnetically induced currents in which the role of the main sources is allotted to the variations in the intensity of the auroral electrojet inducing the currents flowing along the latitude. Based on this it is believed that magnetic disturbances mainly threaten technological systems that are elongated in the longitudinal (W–E) direction. In this work, we make an attempt to employ new characteristics to describe the variability of the geomagnetic field during the geomagnetic storm of March 17, 2013. These characteristics, calculated from the data of the IMAGE magnetometer network stations, are compared to the records of the induced currents in the power lines on the Kola Peninsula and in Karelia. The vector technique revealed a considerably lower variability of the horizontal component of the geomagnetic field compared to its derivative. Quantitative estimates of the variability supported the fact that the variations of the field occur on a commensurate scale both in magnitude and direction. These results cannot be accounted for by the simple model of the extended ionospheric current and demonstrate the importance of allowing for small-scale current structures (with the spatial scales of a few hundred km) in the calculations of the geomagnetically induced currents. Our analysis shows that the geomagnetically induced currents are not only hazardous for the technological objects oriented in the longitudinal (W–E) direction but also for those elongated meridionally.
Keywordsgeomagnetically induced currents electric power systems geomagnetic variations ionospheric currents
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- Du, J., Wang, C., Zhang, X.X., Shevyrev, N.N., and Zastenker, G.N., Magnetic field fluctuations in solar wind, foreshock and magnetosheath: cluster data analysis, Chin. J. Space Sci., 2005, vol. 25, no. 5, pp. 368–373.Google Scholar
- Efimov, B., Sakharov, Ya., and Selivanov, V., Geomagnitnye shtormy: Issledovanie vozdeistvii na energosistemu Karelii i Kol’skogo poluostrova, Nov. Elektrotekh., 2013, no. 2, p. 80.Google Scholar
- Kappenman, J.G., An overview of the impulsive geomagnetic field disturbances and power grid impacts associated with the violent sun-earth connection events of 29–31 October 2003 and a comparative evaluation with other contemporary storms, Space Weather, 2005, vol. 3, p. S08C01.Google Scholar
- Lanzerotti, L.J., Space weather effects on technologies, in Space Weather, AGU Geophys. Monogr. Ser., vol. 125, Song, P., Singer, H.J., and Siscoe, G.L., Eds., Washington: AGU, 2001, pp. 11–22.Google Scholar
- Pirjola, R., Kauristie, K., Lappalainen, H., Viljanen, A., and Pulkkinen, A., Space weather risk, Space Weather, 2005, vol. 3, p. S02A02.Google Scholar
- Sakharov, Ya.A., Danilin, A.N., and Ostafiychuk, R.M., Registration of GIC in power systems of the Kola Peninsula, Proc. 7th Int. Symp. on Electromagnetic Compatibility and Electromagnetic Ecology, St.-Petersburg, June 26–29, 2007, St. Petersburg, 2007, pp. 291–293.Google Scholar
- Sakharov, Ya.A., Danilin, A.N., Ostafiychuk, R.M., Katkalov, Yu.V., and Kudryashova, N.V., Geomagnetically induced currents in the power systems of the kola peninsula at solar minimum, Proc. 8th Int. Symp. on Electromagnetic Compatibility and Electromagnetic Ecology, St. Petersburg, 2009, pp. 237–238.Google Scholar
- Viljanen, A., Pulkkinen, A., Amm, O., Pirjola, R., Korja, T., BEAR Working Group, Fast computation of the geoelectric field using the method of elementary current systems and planar Earth models, Ann. Geophys., 2004, vol. 22, pp. 101–113.Google Scholar