A major binding constraint (T_BLINK_TV_NGZ) with an exceptionally high shadow price of $8.352 million occurred in Tasmania on 2 September 2026 during the 13:05–13:35 window. Regional energy prices fell sharply from around $40/MWh to $15/MWh over this period, despite stable generation from hydro and wind sources totalling approximately 1,140–1,350 MW.
The severe constraint violation and extreme marginal value indicate a physical transmission or operational limit was binding in Tasmania, preventing efficient energy flows. The rapid price decline despite consistent renewable generation suggests the constraint's relaxation or relief after 13:20, rather than a supply-side change, was the primary driver of the return to lower price levels.
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.