ETAP works with two main standards IEC and ANSI. In Qatar, IEC is the standard used. Therefore, knowing that ETAP works with that standard. It can assume some parameters for the components. For example, after defining the size of a transformer, ETAP can assume the impedance per unit and the X/R ratio. The other assumption that was made is the power factor. The power factor is assumed as 0.9 in all buses. After studying the single line diagram received from the facilities, it was realized that the average power factor of the whole system is almost 0.9. That assumption was made due to the lake of the reactive power data.