Kidston absolutely is included under these North Queensland...

Kidston absolutely is included under these North Queensland system strength constraints, though far less affected than other solar farms. The curtailment is likely a combination of this constraint, as well as perhaps self-curtailment at negative prices (if that's the agreement with Qld Gov - anyone have insight on this?). The constraint equation seems to throttle Kidston output down to 37MW.

Sources (sorry the links won't work in HotCopper)

https://www.pv-magazine.com/2020/07/29/grid-constraints-threaten-to-curtail-more-than-1-gw-of-solar-projects-in-north-queensland/

"The solar farms which could be affected are Esco Pacific’s Ross River (148 MW) plant, FRV’s Clare (100 MW), Genex’s Kidston 1 (50 MW), Adani’s Rugby Run (65 MW), Ratch-Australia’s Collinsville (42.5 MW), and four projects in the Edify Energy portfolio: Daydream (180 MW), Hamilton (69 MW), Hayman (60 MW) and Whitsunday (69 MW)"


https://aemo.com.au/-/media/files/electricity/nem/security_and_reliability/congestion-information/nqld-system-strength-constraints.pdf?la=en