It as all evident that the everyday life is basically based oil electric power. Electric power networks provide the required power to the Customers. However as greater amounts of power are daily demanded, the need for the construction of new networks or the expansion of the existing ones constitute an issue of vital importance. A network is basically divided into three parts: the main station, which produces the power and distributes it to the Substations, the Substations that distribute the power to the loads and the loads that are represented by the customers. The Current work is basically focused on the part of the substations distributing power to the loads. It is proved that when designing a distribution substation it is more customary and helpful to employ geometric figures, thus the distribution is planned to supply the load in a way that it is easier to analyse and construct. Alternative models for green field distribution system planning are analysed and compared in this study in an effort to provide the most liable Solution in terms of cost and reliability for whole network distribution systems.