A binding constraint (T_BLINK_TV_NGZ) in TAS1 reached an exceptionally high shadow price of $8.352 million/MWh during the 16:05–16:20 settlement intervals on 4 July 2026. Regional prices rose sharply from approximately $72/MWh to $85–86/MWh coinciding with the constraint binding, despite stable hydro and wind generation across the snapshot period.
The binding constraint T_BLINK_TV_NGZ with its dominant marginal value indicates a physical or operational limit was actively restricting power flows within TAS1. The sharp price rise and extreme shadow price suggest tight supply conditions or constrained export capacity during this period, though the generation mix (predominantly hydro at ~1070–1080 MW plus modest wind) remained relatively constant, implying the constraint tightness was driven by demand or external interconnector conditions rather than local generation shortfalls.
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.