Power Transmission Line Model For Transient Analysis In Power Systems Due The High Geomagnetic Activity

The authors show that mathematical modeling is the best approach to analyzing the processes occurring in power systems under perturbations. The parameters of a standard U-shaped equivalent circuit for a power transmission line should be calculated taking into account the proportion of the power transmission line length and the alternating current wavelength at 50 Hz. If the transmission line length is less than 5% of the wavelength, the distribution of line parameters might not be considered. If the transmission line length is between 5% and 10% of the wavelength, the distribution of line parameters can be accounted for using correction factors. If the transmission line length is over 10% of the wavelength, it is necessary to consider the wave properties of the line using the attenuation factor and phase coefficient. To analyze the transient processes in power systems under high geomagnetic activity, the authors developed a modified transmission line model by complementing the standard model with a floating voltage grounding device. The authors verified the developed transmission line model modification.