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The Smart Grid concept is conceived as a means to optimize the operation and to improve the reliability of the electric delivery system. Many applications operating at the distribution level can be considered as Smart Grid functions because the results of the control applications ripple all the way into the transmission system and the generation plants. Unless these applications are properly integrated, the possibilities that the results create undesirable situations will occur. Accurate assessment of the state of energy system can be obtained from data collected from Smart Meters and other remote monitoring devices. A solid two-way communication system to handle transfer of massive amounts of data to a data repository computer is required. The communication system also serves as a control link between command center and remotely located control devices. This paper describes the requirements that link the architectural building blocks, the Smart Meters, Communication System and Data Repository and Management System, to form a superstructure that supports many functions and applications for Smart Grid applications.