A binding constraint (T_BLINK_TV_NGZ) in TAS1 reached an exceptionally high shadow price of $7,308,000/MWh during the evening of 25 June 2026, indicating severe congestion or network limitation. Regional electricity prices ranged between $41–$50/MWh during this period, with TAS1 generation dominated by hydro (approximately 920–940 MW) and wind (50–95 MW) sources.
The extreme shadow price on the binding constraint T_BLINK_TV_NGZ suggests the constraint was tightly binding and limiting dispatch, creating a substantial gap between the marginal cost of generation and the market-clearing price. The disparity between the constraint's marginal value ($7.3 million/MWh) and actual regional prices ($40–$50/MWh) indicates the constraint was the primary driver of price formation, rather than fuel costs or demand-side factors, implying a network or transmission limitation was actively restricting power flows in TAS1.
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.