Tasmania experienced a major constraint event on 10 July 2026 with binding constraint T_BLINK_TV_NGZ reaching an exceptionally high shadow price of $8.352 million. Regional reference prices remained elevated at $85–89/MWh during the period, with hydroelectric generation comprising the dominant supply source at approximately 1050–1300 MW alongside modest wind contributions of 150–180 MW.
The extreme marginal value of the binding constraint T_BLINK_TV_NGZ suggests severe transmission or operational limitations were restricting energy flows in Tasmania during this period. The constraint's shadow price vastly exceeds the concurrent regional energy prices, indicating that the binding constraint was the primary determinant of market scarcity, with supply-demand balance in TAS1 being tightly governed by this specific operational limit rather than by fuel cost or conventional capacity constraints.
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.