Transient Simulation of Lightning in the Transmission Line and Consideration of Corona Impact and Frequency Dependence and Analogy between Them

The waveform and amplitude of overvoltage generated in the transmission line due to lightning strikes are of great importance in the insulation coordination of electrical equipment in the power grid and the choice of lightning protection. Corona impact and frequency dependence are among the factors that cause overhead line attenuation and distortion. One of the existing skin effects that cause the radial parameters of the line to be dependent on the frequencies of lightning and cause changes in other parameters is corona strokes. It is necessary to consider the optimal insulation design and lightning protection and economic aspects in the transient characteristics caused by lightning transmission lines by analyzing the two issues of corona impact and frequency dependence. In this paper, lightning-induced transient simulations in transmission lines are considered by considering the effects of frequency dependence and corona shocks. The model simulation was performed by ATP-EMTP.