A severe binding constraint (T_BLINK_TV_NGZ) with an exceptionally high shadow price of $8.352 million occurred in TAS1 on 16 August 2026 during the late afternoon period, whilst regional prices remained relatively moderate at approximately $50/MWh. The constraint binding at this extreme marginal value indicates a critical physical or operational limit was reached despite stable generation mix dominated by hydro (approximately 895 MW) and modest wind and gas-OCGT contributions.
The extraordinarily high shadow price on the T_BLINK_TV_NGZ binding constraint suggests severe scarcity in a critical transmission or operational pathway, creating a large gap between unconstrained and constrained dispatch costs. This scarcity condition occurred despite healthy regional generation levels and moderate spot prices, indicating the constraint represents a physical bottleneck rather than a fuel supply shortage; the persistence of the constraint across multiple consecutive five-minute intervals further supports that an equipment limitation or network configuration restriction was actively limiting power flows during this period.
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.