Registration of GIC in Power Systems of the Kola Peninsula

To study the geomagnetic disturbance impact on the power systems of the Kola Peninsula, the Center of physical-technical problems of energetics of the North jointly with the Polar Geophysical Institute developed a system of GIC monitoring in "Kolenergo" company networks. A system of digital registration of GIC was developed, which provides a continuous measurement of DC of dead-grounded neutral of the power autotransformer at the power system substations of 110-330 kV class and the monitoring of the frequency spectrum of the industrial frequency voltage (50 Hz). Increases of geoinduced currents (GIC) in the power line, oriented south-north can be observed under the average and high levels of activity (Kp=4-9) in the evening and night hours. The obtained data can be used for modeling the coupling between geomagnetic disturbances and GIC in power lines.