LIGHTNING ELECTROMAGNETIC FIELDS INSIDE HIGH VOLTAGES SUBSTATIONS USING FDTD

High voltage substations are the main part in any power system utilities or municipalities. Proper design of lightning protection system should be done in the preliminary stage of the design process. In this paper, a typical high voltage substations of 500/220 kV is modeled by developing multi-scripts of Matlab m-files. To allocate and to simulate the whole carrying current conductors inside the substation and with 100 m length of input and output power lines. This is to calculate and to demonstrate the lightning electromagnetic fields inside the substations during lightning conditions using the Finite Difference Time Domain (FDTD) method with Maxwell's equations. The effects of the posts allocations, its heights and surge arrestors to secure optimum protection zones are investigated. The…