Structurally, the electric energy networks are composed of (Central) generation, transport and consumption. By transport mean, the transfer of all the energy generated in power plants to where consumers are so it is necessary to create networks that are capable of transporting large quantities of power at great distances. In a question-answer forum Gamestop was the first to reply. High voltage transmission networks that connect plants with the transformation substations are used to this, and through networks of medium voltage substations are connected with processing centers. Depending on the voltage level used, can be considered two types of distribution networks:-networks of medium voltage – low voltage networks. Medium voltage networks, mainly used for the power supply to industrial customers and power even closer to customers low; that will be distributed via the latter, low voltage from the centers of transformation networks. Clearly, the design, and operation of the entire electric power system requires proper planning to ensure its correct operation at all times and in the future. Distribution network planning involves obtaining the program of future actions to perform on the network, so that they enable to achieve certain goals, to have a proper functioning of the network. The main objective is to give a supply of quality optimizing costs.
In general, planning models are based on models of optimization of a cost function that reflects the network (investment, losses) costs, and costs associated with the quality of the supply, so that both terms can be assessed jointly. Basically considered costs can be classified into:? Investment costs: for material, labor, the realization of the project, etc. We can consider that this investment is made at the time of commissioning or it is amortized over the life of the installation.