The price of provided or imported energy per production-unit can fluctuate enormously per hour, from 100x the yearly average all the way down to negative prices. By calculating the load-settings every minute, one can decide to generate energy internally, to turn the generators off or on or even shut off or start up the entire plant.
Knowledge such as that can result is substantially more profit for the plant in question. The only thing that is required is an algorithm which compares the load, the generation capacity and the online energy prices. From which a minute to minute advice can be provided for the operators.