Dear Paul,
I have a big question on my mind and I ask you to help me, please. I am simulating in SAM a CSP tower plant with 111 (MWe) of gross design turbine output, a solar multiple of 2.8 and 17.5 hours of storage.
I have adjusted the Dispatch Control as I show you in the attached image. Particularly in January, at 1:00 p.m. the turbine should only operate at a low percentage and then gradually go up.
When I simulate the plant, they give me the results that I show you in the other attached image. As you can see, in January, the generation goes down until 1:00 p.m. (so far so good), but after 3:00 p.m. the generation rises suddenly. The latter is rare, because according to Dispatch Control, it has period 2, which is equivalent to weighting the turbine with only 0.359 only. Why is the generation so high from that time on? Shouldn't it be a more gradual increase? What could be a possible explanation for this phenomenon? From 2:00 p.m. to 3:00 p.m. there is a very abrupt change.
Maybe there is something I am not considering.
I hope I was clear.
Thank you in advance for your kind response, please.
Francisco