Abstract: “The Smart regarded as the next generation power grid, uses two-way flows of electricity and information to create a widely distributed automated energy delivery network. Creation of a Smart Grid provides utilities and their customers a significant improvement in power reliability and services. This paper presents a review on Smart grid technologies. One can see the characteristics, benefits, and challenges in the field of Smart grid. This paper gives brief discussion about the smart infrastructure system. Two-way flows of electricity and information lay the infrastructure foundation for the smart grid. This paper explains works on smart infrastructure system and outline of research directions and challenges.”

Keywords: advanced metering infrastructure (AMI), distributed energy resources (DER), Smart Grid (SG), smart infrastructure system, smart distribution, smart generation, smart transmission.