A major binding constraint (T_BLINK_TV_NGZ) with an exceptionally high shadow price of $8.352 million became active in the TAS1 region during the 09:15–09:40 settlement period on 18 August 2026. The constraint significantly restricted power flow despite relatively moderate wholesale prices ranging from $25.08 to $32.49 per MWh, indicating a physical transmission limit rather than economic scarcity.
The binding constraint T_BLINK_TV_NGZ with a marginal value of $8.352 million suggests severe congestion on a critical transmission element, likely driven by the volume of generation available in Tasmania (approximately 2,400–2,600 MW from hydro, wind and gas sources). The extraordinarily high shadow price relative to spot prices indicates that the constraint is physically limiting export capacity rather than being economically set, suggesting Tasmania's generation stack is unable to be fully dispatched due to transmission infrastructure limits.
Causal analysis generated by gridIQ's synthesis model from live AEMO market data: dispatch prices, generation mix, interconnector flows and market notices in the interval surrounding the event.