Introduction and motivation
The energy consumption rate is increasing rapidly at national and international levels, therefore, the energy sustainability, reliability, and carbon footprint are becoming key issues to be addressed in the twenty-first century. The power system is to be re-architected and the changes will require a paradigm shift in the electricity delivery system. The smart grid is the term applied to tomorrow's electricity system. This chapter presents an overview of the smart grid with its general features, functionalities, and characteristics along with its present status and future trend.