TY - JOUR N2 - Groundings are necessary parts included in lightning and shock protection. In the case of a surge current, high current phenomena are observed inside the grounding. They are result of the electrical discharges around the electrode when the critical field is exceeded in a soil. An available mathematical model of grounding was used to conduct computer simulations and to evaluate the influence of current peak value on horizontal grounding parameters in two cases. In the first simulations, electrode placed in two different soils were considered. The second case was a test of the influence of current peak value on grounding electrodes of various lengths. Simulation results show that as soil resistivity increases in value, the surge impedance to static resistance ratio decreases. In the case of grounding electrodes lengths, it was confirmed that there is a need to use an operating parameter named effective grounding electrode length, because when it is exceeded, the characteristics of grounding is not significantly improved during conductance of lightning surges. The mathematical model used in the paper was verified in a comparison with laboratory tests conducted by K.S. Stiefanow and with mathematical model described by L. Grcev. L1 - http://www.czasopisma.pan.pl/Content/119414/PDF/12_01832_Bpast.No.69(2)_26.04.21_K1_G_OK.pdf L2 - http://www.czasopisma.pan.pl/Content/119414 PY - 2021 IS - 2 EP - e136730 DO - 10.24425/bpasts.2021.136730 KW - grounding electrodes KW - grounding impedance KW - grounding coefficient KW - transient response A1 - Łukaszewski, Artur A1 - Nogal, Łukasz VL - 69 DA - 08.03.2021 T1 - Influence of lightning current surge shape and peak value on grounding parameters SP - e136730 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/119414 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences ER -