Numerical modeling of a large-scale wire antenna array is associated with the need to account for the mutual influence between radiators in the array, which leads to a significant change in the input impedance and in the radiation pattern of the radiator in the array compared to the isolated radiator. The method of integral equations is considered the most accurate method for numerical analysis of a wire radiator, but the capabilities of this method are greatly limited by the large wave dimensions of the radiator or an array with a large number of radiators. This article discusses two methods to overcome these limitations. In these two methods, the array is divided into a number of identical parts. The well-known method roughly takes into account the mutual influence between the radiators. In addition to the above, the proposed method allows calculating the effect of the edge effect between parts of the array. Calculating the effect of the edge effect in the proposed method led to great accuracy in determining the input impedance of the array radiators, which is what the known method lacks