After that automation electrical power transfer stations towards to use intelligent electronic devices that are performing multiple functions : process protection, monitoring, control and use private companies manufacturers of equipment communication protocols, so that need to build electrical smart grid that coordinate his parameters and support his devices. Search begins definition electrical smart grid and its importance, and includes the benefit of this electrical smart grid, the requirements and the careers then the specifications of electrical smart grid, at the end of the search: we compare between the electrical power transfer stations in electrical traditional grid and electrical smart grid.