Abstract :
The main purpose of an electric network is to transfer electricity from the electric power generators to the clients. The distribution networks make the connection to the final clients and must satisfy the electricity service with an agreed quality level on watch in the applicable norm. In the case of the province of San Juan — Argentina, it is Energía San Juan S.A. The combined development of the generation of the heat and of energy and the interest for the renewable energies (biomass, aeolian, solar, etc.) they can lead in the present to a growth of the supply of energy in small modules. As these generators can be connected in any point of the network, we can say that this is the evolution of the network with the introduction of the dispersed sources of generation. Also, the introduction of a generator in any point of the network can cause some complications with the coordination of the protections. This means that when the fault appears, now exits several ways of contribution from current to the place of the fault, causing generally problems between the protection elements that are not directional. The present work states a strategy to achieve the coordination of protections in the MV of 13,2 kV, where it was connected a synchronous generator with a hydraulic turbine that generates approximately 350 kW (the considered load of the distributor is of around 2500 kW). This generator belongs to a private company and this located in a point near the main source of the feeder.
