A major binding constraint (T_BLINK_TV_NGZ) with an exceptionally high shadow price of $8.352 million per MWh became active in TAS1 during the 20:15–20:40 settlement period on 15 September 2026. Regional electricity prices ranged between $87.60 and $102.87/MWh during this interval, with the peak occurring at 20:20.
The constraint T_BLINK_TV_NGZ became binding with a marginal value far exceeding typical network constraint economics, indicating a severe physical or operational limitation that prevented additional power flow. The generation mix during this period comprised substantial hydro output (2,555 MW aggregate) and wind generation (910 MW aggregate), with zero gas OCGT capacity online, suggesting the constraint was active despite relatively high renewable availability and likely reflects transmission network limits or operational thresholds binding under the prevailing supply–demand configuration.
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.