Observational Results of Lightning Current on Transmission Towers

Monte Carlo method for estimating backflashover rates on high voltage transmission lines

“…Hence, only parameters of this lightning current type will be presented hereafter. These parameters are provided, among others, in the following publications [31][32][33][34][35].…”

Lightning Discharge and Fundamentals of Lightning Protection

“…Takami and Okabe [20] presented lightning return-stroke currents directly measured on 60 transmissionline towers (at the top) whose heights ranged from 40 to 140 m. A total of 120 current waveforms for negative first strokes were obtained from 1994 to 2004. This is the largest sample size for negative first strokes as of today.…”

Geographical variations of negative cloud-to-ground lightning parameters: A review

“…In addition, a large data set of current waveforms (120 negative CO flashes -only first strokes) was measured in 60 transmission line towers in Japan by Takami and Okabe [12]. Although obtained in different towers, under different conditions, the results of the in Japan is included in the analysis considering its large sample size.…”

“…Table 2 shows the median values of front duration obtained in Switzerland [9], Brazil [11], Japan [12] and Italy [10], calculated as the time between the 10% and 90% values of the amplitude of the first peak in the current wave front (T-10). The differences are lower or of the order of one standard deviation suggesting that no changes exist in different locations.…”