This paper describes the model of a management system for distribution networks including Distributed Generation GD elements. The proposed model is based on the use of labeled target function of distributed generation setting an order of priority to certain users (pro users) of the network, in terms of location and power dispatch rights. By means of software simulations the zoning of protections on different points in the network is assessed. The system modeling is performed through the Unified Modeling Language (UML) in ASTAH Community.