Within the framework of the national project “Digital economy of the Russian Federation” the Ministry of energy of the Russian Federation is implementing the departmental project “unified technical policy – relia-bility of power supply”. The main objectives of the departmental project are aimed at implementing risk-based management, improving the level of reliability of energy supply to consumers. One of the risk factors for pow-er supply systems is a natural phenomenon caused by ionospheric-magnetospheric connections – geomagnetic-induced currents. The proposed method for assessing these risks is based on the registration of higher harmon-ics in high-voltage power lines, which makes it possible to improve the accuracy of diagnostics of geomagnet-ic-induced currents by reducing the influence of the network's own harmonics. The choice of the optimal even harmonic number for diagnostics is theoretically shown and experimentally confirmed. A contactless method for obtaining information about variations of higher harmonic components in high-voltage power lines is pro-posed and tested. The degree of the 6th harmonics correlation in 220 kV power transmission lines of Mutnovskaya Geothermal Power Plant with the Earth's magnetic field variations obtained at the observatory “Paratunka” (Paratunka village, Kamchatsky Krai) was experimentally investigated.
Fixed site monitoring of potential gradient fluctuations near to AC high voltage power lines
