A binding constraint (T_BLINK_TV_NGZ) in TAS1 reached an exceptionally high shadow price of $8.352 million during the early morning period of 15 August 2026, coinciding with volatile spot prices ranging from $17.56 to $88.24/MWh across the 5-20 minute window. The constraint's marginal value was substantially higher than all other concurrent binding constraints, indicating severe scarcity in the constrained element.
The extreme shadow price reflects a tight physical limitation imposed by the binding constraint T_BLINK_TV_NGZ, which became the dominant price setter in the dispatch. Whilst Tasmanian generation was substantial (primarily hydro at 786–807 MW supplemented by gas OCGT and rooftop solar), the constraint's high marginal value suggests demand could not be fully satisfied within the constrained pathway without significantly curtailing dispatch, forcing the market to price scarcity at the constraint boundary rather than through available supply.
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.