Wavelet analysis of geomagnetically induced currents during the strong geomagnetic storms
Author:
Aksenovich Tatyana1, Bilin Vladislav23, Saharov Yaroslav243, Selivanov Vasiliy1
Affiliation:
1. Northern Energetics Research Centre KSC RAS 2. Polar Geophysical Institute, RAS 3. Nothern Energetics Research Centre KSC RAS 4. Polar Geophysical Institute
Abstract
The main problem of electric utilities around the world is to ensure continuous power supply to consumers. One of the causes of power outages and blackouts can be geomagnetic storms during periods of the increased solar activity. They arouse geomagnetically induced currents (GICs) flowing in the long-distance high-voltage power grids on Earth’s surface. The history of this phenomenon investigation shows that GICs during strong geomagnetic storms had led to blackouts in certain regions of Canada, Sweden and the USA. To study these phenomena and assess the risks of such accidents for the regional system, a GICs registration system in 330 kV autotransformers neutrals of the Kola-Karelian power transit was developed in northwestern Russia. During 11 years of monitoring numerous cases of the flow of high values of quasi-dc currents with different time durations, induced by variations of the geomagnetic field, have been registered. In order to analyze the currents a wavelet transform was chosen, since this method allows to define not only the frequency composition but also changes in spectral characteristics over time, which is significant in the study of GIC. The paper presents a discussion of GIC scalograms obtained for four events of Solar Cycle 24: 13-14 November 2012, 17-18 March 2015, 7-8 September 2015 and 7-8 September 2017. The analysis showed that the characteristic duration of the peak of the considered GICs is from 4.6 to 11.1 min.
Publisher
Geophysical Center of the Russian Academy of Sciences
Subject
General Earth and Planetary Sciences
Reference29 articles.
1. Adhikari, B., N. Sapkota, S. Dahal, B. Bhattarai, K. Khanal, and N. P. Chapagain (2019), Spectral characteristic of geomagnetically induced current during geomagnetic storms by wavelet techniques, Journal of Atmospheric and Solar-Terrestrial Physics, 192, 104,777, doi:10.1016/j.jastp.2018.01.020., Adhikari, B., Sapkota, N., Dahal, S., Bhattarai, B., Khanal, K., & Chapagain, N. P. (2019). Spectral characteristic of geomagnetically induced current during geomagnetic storms by wavelet techniques. Journal of Atmospheric and Solar-Terrestrial Physics, 192(June 2017), 104777. https://doi.org/10.1016/j.jastp.2018.01.020 2. Aksenovich, T. V. (2020), Comparison of the Use of Wavelet Transform and Short-Time Fourier Trans- form for the Study of Geomagnetically Induced Current in the Autotransformer Neutral, in 2020 Inter- national Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon), pp. 1–5, IEEE, doi:10.1109/fareastcon50210.2020.9271210., Aksenovich, T. V. (2020). Comparison of the Use of Wavelet Transform and Short-Time Fourier Transform for the Study of Geomagnetically Induced Current in the Autotransformer Neutral. In 2020 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon) (pp. 1–5). IEEE. https://doi.org/10.1109/FarEastCon50210.2020.9271210 3. Albert, D., P. Schachinger, R. L. Bailey, H. Renner, and G. Achleitner (2022), Analysis of Long-Term GIC Measure- ments in Transformers in Austria, Space Weather, 20(1), e2021SW002,912, doi:10.1029/2021sw002912., Albert, D., Schachinger, P., Bailey, R. L., Renner, H., & Achleitner, G. (2022). Analysis of Long-Term GIC Measurements in Transformers in Austria. Space Weather, 20(1), e2021SW002912. https://doi.org/10.1029/2021SW002912 4. Barannik, M. B., A. N. Danilin, Y. V. Kat’kalov, V. V. Kolobov, Y. A. Sakharov, and V. N. Selivanov (2012), A system for recording geomagnetically induced currents in neutrals of power autotransformers, Instruments and Experimental Techniques, 55(1), 110–115, doi:10.1134/s0020441211060121., Barannik, M. B., Danilin, A. N., Kat’kalov, Y. V., Kolobov, V. V., Sakharov, Y. A., & Selivanov, V. N. (2012). A system for recording geomagnetically induced currents in neutrals of power autotransformers. Instruments and Experimental Techniques, 55(1), 110–115. https://doi.org/10.1134/S0020441211060121 5. Belakhovsky, V., V. Pilipenko, M. Engebretson, Y. Sakharov, and V. Selivanov (2019), Impulsive disturbances of the geomagnetic field as a cause of induced currents of electric power lines, Journal of Space Weather and Space Climate, 9, 18, doi:10.1051/swsc/2019015., Belakhovsky, V., Pilipenko, V., Engebretson, M., Sakharov, Y., & Selivanov, V. (2019). Impulsive disturbances of the geomagnetic field as a cause of induced currents of electric power lines. Journal of Space Weather and Space Climate, 9, A18. https://doi.org/10.1051/swsc/2019015
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