Voltage induced on a test distribution line by negative winter lightning strokes to a tall structure

Voltages Induced on an Overhead Wire by Lightning Strikes to a Nearby Tall Grounded Object

“…In Appendix A, we show that for the case of strikes to flat ground, the FDTD method yields reasonably accurate results by comparing lightning-induced voltages calculated using our FDTD method with these measured by Ishii et al [27] in a small-scale experiment and in Appendix B with those calculated using Rusck's formula [13]. In Appendix C, we compare induced voltages due to lightning strikes to a 200-m-high object calculated using the FDTD method with those measured by Michishita et al [23].…”

“…They employed a model based on the hybrid electromagnetic field/circuit theory approach [22], in which the current wave propagation speed along the leader channels both above and below the junction point was equal to c and used a current waveform having a RT of 1 µs. Voltages induced by lightning strikes to a tall object were also calculated by Michishita et al [23], who represented the strike object by an R-L-C distributed circuit (R, L, and C stand for resistance, inductance, and capacitance, respectively) and used the Agrawal model, and by Pokharel et al [24], who represented the strike object by a vertical perfectly conducting wire and used NEC-2. Both groups employed Norton's approximation [25] to take into account the lossy-ground effect and succeeded in reproducing the corresponding measured voltages induced by lightning strikes to a 200-m-high object (Fukui chimney).…”

Analysis of Lightning-Induced Voltages on Overhead Lines Using a 2-D FDTD Method and Agrawal Coupling Model

“…2) Comparison With Experimental Data: Michishita et al [25] have carried out induced-voltage experiments on the coast of the Sea of Japan from 1993 to 1997. The plan view of the experimental site is shown in Fig.…”

“…Here, we compare simulation results for Michishita et al's configuration obtained using the 2-D FDTD method and the [25]. Fig.…”

“…11. Current waveform used in [25] and its approximation used in this paper. Agrawal coupling model with measurements.…”