Tasmania experienced a major constraint event on 2 July 2026 around 07:00 AEST, with the binding constraint T_BLINK_TV_NGZ reaching an exceptionally high shadow price of $8.352 million/MWh. This triggered a sharp price spike to $85.24/MWh in the 07:00 settlement interval, representing a 63% increase from the preceding half-hour, before prices moderated in the following period.
The extreme shadow price on constraint T_BLINK_TV_NGZ indicates a severe physical limitation preventing energy transfer, with the constraint becoming critically binding despite Tasmania's robust generation from hydro (averaging 893 MW) and wind (averaging 475 MW) sources. The magnitude of the marginal value suggests the constraint was limiting Tasmania's ability to export surplus energy or respond to demand, forcing local prices to spike as the constraint prevented market-clearing flows, though the rapid price moderation immediately after suggests the constraint relaxed within the following settlement interval.
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.