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The paper aims at simulating the behaviour of a real medium voltage electric network in order to analyse the effects of distributed generation penetration, in particular from solar source. Firstly the network model has been designed by the simulation tool DIgSILENT, using data obtained from the Distribution System Operator (DSO) to highlight, through subsequent checks, the likeliness between results from simulated scenarios and available measurements. Then static simulations were performed, with different scenarios of PV generation, in order to check the possibility to manage this generation. The behaviour of the network in compliance with the current national standards has been verified. Finally some dynamic simulations were performed in order to analyse transients due to typical operations of distribution systems.