Controls guy here, trying to understand the hardcore power stuff. I recently visited a power plant and was kind a surprised the way the power is dispatached. Not only they were trying to maintain a certain MW load output from the station, from time to time, they were also somehow adjusting the MVAR on the machine (operators did not knew how exactly how MVAR is manipulated, they did tell me it is required based on the load on the grid and is requested to be adjusted by the dispatcher). Could someone please, in simple terms, explain the relationship between MW, MVAR and MVA, why we talk all terms in power dispatch and what/why do we adjust the MVAR. Thanks a bunch
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