Ufa University of Science and Technology
Ufa, Russian Federation
Schmidt Institute of Physics of the Earth, RAS
Moscow, Russian Federation
Ufa, Russian Federation
Ufa, Russian Federation
Development of new probabilistic and statistical models for operational assessment of technospheric risks caused by space weather impacts on high-latitude power systems is a relevant research task with significant practical applications. Such models are of the greatest practical importance in polar and subpolar regions with insufficient availability of reliable and accurate geomagnetic data sources. This paper presents an original approach to hardware-free (without specialized equipment) assessment of geomagnetically induced current (GIC) levels in power systems of the Russian Arctic zone by interpreting visually observable auroral features as natural indicators of space weather conditions. Using the case study of the 330 kV Vykhodnoy substation in the Severny Transit main power grid, a stable statistical relationship is demonstrated between the auroral observation area, auroral structure, and GIC levels in high-latitude power systems. It is established that during periods of discrete auroras the probability of GIC exceeding 10 A is over 7.5 %, whereas for diffuse auroras this probability is only 0.31 %. In the absence or scarcity of instrumental measurement data, the developed models can be employed to estimate the likelihood of extreme GIC in Arctic power distribution systems and grids, relying solely on visual natural indicators. The practical application of the proposed models in certain scenarios may improve decision-making efficiency in situations with low situational awareness in the relevant field
geomagnetic variations, space weather, high-latitude power grids, statistical models
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