The 500kV overhead transmission system is the backbone of electricity grid transmission. The lines cut across wide areas where some of the region lies in the high ground flash density of lightning strikes. Due to the tall structures of the 500kV tower, the structures are very susceptible to direct lightning strikes. This research will investigate the modelling and analysis of these 500kV towers under the influence of direct lightning faults, either shielding failures or backflashover situations. The study will be conducted via the PSCAD modelling software.