A severe binding constraint event occurred in TAS1 on 1 August 2026 at 21:35 UTC, with constraint T_BLINK_TV_NGZ reaching an exceptional shadow price of $8.352 million per MWh. This constraint binding caused TAS1 regional reference prices to spike from $0.18/MWh to $9.18/MWh within a single trading interval, representing a 50-fold increase.
The binding constraint T_BLINK_TV_NGZ, with its extraordinarily high marginal value of $8.352 million, directly constrained available transfer capacity and forced the market to price scarcity at the binding limit. The TAS1 generation mix at the time comprised approximately 1661 MW of hydro, 506 MW of wind, and 249 MW of gas generation, indicating that the constraint limitation on power flows was the primary driver of the price spike rather than a shortage of local generation capacity.
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.