Abstract: The present electric grids use the technology of 1970`s.But with the advancement in various concepts of power generations, problems associated with power outages and thefts, and also due to increase in demand, we require a modernized grid to avail all the needs of customers even in the situations of hype which can be called a “smart grid”. The smart grid performs various functions such that it increase grid stability, reliability, efficiency and ultimately reduces line. Also the smart grids are designed to allow the two-way processing of electricity from consumers that have distributed generations. Various technologies like sensing and measurement, usage of advanced components are to be used for successful functions; technologies used in smart grids are discussed.

Keywords: Generation, Transmission, Distribution, power grid and smart grid