A major binding constraint event occurred in TAS1 on 22 June 2026 with constraint T_BLINK_TV_NGZ reaching an exceptionally high shadow price of $7,308,000/MWh. This coincided with TAS1 spot prices rising to a peak of $71.69/MWh during the 17:55 settlement period, whilst the region maintained substantial hydro generation (832–847 MW) and moderate wind output (224–284 MW) with no OCGT dispatch.
The extreme shadow price on the binding constraint T_BLINK_TV_NGZ indicates a severe operational limitation preventing the market from clearing at lower prices; this constraint was the primary price setter during the event. The absence of OCGT generation and the reliance on hydro and wind suggests the constraint was binding due to transmission or technical limits rather than insufficient generation capacity, with the region's available resources unable to relieve the constrained pathway without violating the constraint equation.
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.