The aim of this paper is to present a new methodology to design the electric power distribution network for rural areas of developing countries. Thus, in the context of the current emergence of new generation and storage technologies, this paper describes different means to electrify developing countries ; by MV systems or by autonomous systems with planned location of small generation and storage. There is also a cost quantification of these different architectures by the way of a cost calculation software which has been developed to size and compare the considered solutions. For each strategy, we calculate investment costs and yearly costs (maintenance and energy cost). So the updated assessment over 20 years can be calculated and the strategies comparison gives the best solution for each electrification problem.

The aim of this paper is to present new tool named "ECOELECTRIFY", for the economic design of electric distribution systems for rural areas in developing countries. Different means to electrify developing countries exist; by MV systems (three-phases or two-phases) or by a n autonomous hybrid system. This tool permits to calculate the electrification cost over a period of 20 years (investment costs and yearly costs) for the different mentioned strategies allowing choosing the less expensive strategy. Afterwards the second step is the optimization of the chosen structure solved hy a dynamic pmgramming algorithm