Power system operations is a term used in electricity generation to describe the process of decision-making on the timescale from one day (day-ahead operation[1]) to minutes[2] prior to the power delivery. The term power system control describes actions taken in response to unplanned disturbances (e.g., changes in demand or equipment failures) in order to provide reliable electric supply of acceptable quality.[3] The corresponding engineering branch is called Power System Operations and Control. Electricity is hard to store, so at any moment the supply (generation) shall be balanced with demand ("grid balancing"). In an electrical grid the task of real-time balancing is performed by a regional-based control center, run by an electric utility in the traditional (vertically integrated) electricity market. In the restructured North American power transmission grid, these centers belong to balancing authorities numbered 74 in 2016,[4] the entities responsible for operations are also called independent system operators, transmission system operators. The other form of balancing resources of multiple power plants is a power pool.[5] The balancing authorities are overseen by reliability coordinators.[6]
^Conejo & Baringo 2017, p. 9.
^Conejo & Baringo 2017, p. 10.
^S. Sivanagaraju (2009). Power System Operation and Control. Pearson Education India. pp. 557–. ISBN 9788131726624. OCLC 1110238687.
^"U.S. electric system is made up of interconnections and balancing authorities". eia.gov. United States Energy Information Administration. 20 July 2016. Retrieved 31 May 2022.
^Bhattacharya, Bollen & Daalder 2012, pp. 54.
^NERC 2018, p. 8.
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