Smart Grids can be defined as the integration of electric grids, 
communications networks, specific hardware and computational 
intelligence (algorithms) to monitor, control, and manage the 
generation, distribution, storage and consumption of energy. 
However, making such a smart and complicated network is not at 
all easy. 
For that a detailed modeling, to make the task easier and more 
achievable. Smart Grid presents a very complex system, the 
components and relationships between entities are difficult to 
model. Poor management can cause many system failures. 
Optimal energy management is necessary in this case. In 
conclusion, Smart Grids are expressions of the digital revolution 
in our energy networks and it is sure that they have begun, and 
will continue, to change the entire value chain. This work
presents a new methodological vision for the modelling and 
optimal management of the energy of an intelligent multi-source 
electrical network. Indeed, it allows the study of the different 
structures of a Smart Grid and their optimization in an 
established regime, on the one hand, and the sizing of the various 
components of the system, on the other hand. This is why it takes 
into account smart electricity and ICT for sustainable 
development.