A major binding constraint (T_BLINK_TV_NGZ) in TAS1 reached an exceptionally high shadow price of $8.352 million on 10 August 2026 around 01:40–02:05 UTC, corresponding with TAS1 spot prices ranging from $35–$66/MWh. The constraint remained active across multiple dispatch intervals during this period, indicating sustained transmission or operational limitations.
The elevated shadow price on binding constraint T_BLINK_TV_NGZ suggests severe congestion or operational constraint binding within the Tasmanian region during low-demand overnight hours. The generation mix shows substantial hydro availability (834–1022 MW across dispatch intervals) alongside moderate wind and gas-OCGT generation, indicating that supply-side conditions did not obviously constrain the system; the extreme marginal value therefore points to a specific transmission path or operational limit being actively restrictive, with the constraint preventing additional flow or dispatch that would otherwise serve demand or support interconnector flows.
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.