A binding constraint (T_BLINK_TV_NGZ) in TAS1 reached an exceptionally high shadow price of $8.352 million per MWh during the settlement period ending 2026-09-01 23:05:00 UTC. The region was operating with substantial hydro and wind generation (approximately 1.1–1.9 GW combined) and no OCGT online, with real-time prices fluctuating between $10.61 and $25.12 across the affected intervals.
The extreme marginal value on the binding constraint T_BLINK_TV_NGZ indicates a severe tightness in a specific network or operational element, creating a sharp wedge between marginal cost and market price. The constraint's shadow price vastly exceeded all other binding constraints (which ranged from $4.99 to $83.41) and the contemporaneous spot prices, suggesting the binding constraint was curtailing or severely limiting available dispatch capacity despite adequate generation capacity in the region.
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.