Power system operations and control: Difference between revisions

Revision as of 20:06, 3 February 2023

Revision as of 02:13, 18 February 2023

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Unit commitment is more complex than the shorter-time-frame operations, since unit availability is subject to multiple constraints:{{sfn|Bhattacharya|Bollen|Daalder|2012|pp=47-52}}

* demand-supply balance need to be maintained, including the sufficient [[spinning reserve]]s for [[Contingency (electrical grid)|contingency]]. The balance need to reflect the transmission constraints;

* thermal units might have limits on minimum uptime (once switched on, cannot be turned off quickly) and downtime (once stopped, cannot be quickly restarted again);

* "must-run" units have to run due to technical constraints (for example, [[combined heat and power]] plants must run if their heat is needed);