An energy management system is a combination of various computer-aided tools used by the operators of electric utility grids, in order to monitor, control, and optimize the performance of an energy generation, transmission, and distribution system. Energy management system (EMS) is not only limited to energy-saving efforts that are adopted to save the available energy, but is also a wider concept to deal with the process of controlling, monitoring, and conserving energy in the public or government sector, businesses, organizations, and even in residential buildings.