Power system is the technical discipline applied to designing the electric power system for high power, electric utility applications as well as industrial and commercial power distribution systems. Power management is the engineering aspect of managing the electric loads such that available power sources are not overloaded and power is allocated to the different loads such that the loads are receiving a proper allocation of power. Power management is a major issue with which the computer system designers have to deal but it is equally critical for the electric utility engineers, operators and system planners.
Power management in computer systems and server farms requires a good understanding of the electric power demands in the computer system when the computer system is running different applications.
Our modern society is entirely dependent on electricity, so problems involving the continuous delivery of power can lead to the disruption and breakdown of vital economic and social infrastructures.