с 16.09.2018 по настоящее время
Апатиты, Россия
с 01.01.2018 по настоящее время
Центр физико-технических проблем энергетики Севера КНЦ РАН (Инженер-программист)
с 01.01.2022 по настоящее время
Апатиты, Мурманская область, Россия
с 01.01.2003 по настоящее время
Центр физико-технических проблем энергетики Севера КНЦ РАН (Научный сотрудник)
Геофизический центр РАН
Апатиты, Мурманская область, Россия
Апатиты, Мурманская область, Россия
ГРНТИ 37.15 Геомагнетизм и высокие слои атмосферы
ГРНТИ 37.25 Океанология
ГРНТИ 37.31 Физика Земли
ГРНТИ 38.01 Общие вопросы геологии
BISAC SCI019000 Earth Sciences / General
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.
geomagnetically induced currents, geomagnetic storm, autotransformer, continuous wavelet transform
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