A major binding constraint (T_BLINK_TV_NGZ) with an exceptionally high marginal value of $8.352 million occurred in TAS1 during the early morning period of 13 July 2026, causing significant price volatility with RRPs ranging from $0.10 to $105.48/MWh across consecutive five-minute intervals. The constraint binding at such an extreme shadow price indicates a severe limitation in available transfer capacity or operational headroom during this period.
The high marginal value of the binding constraint T_BLINK_TV_NGZ suggests that demand exceeded the available transfer or operational capacity at that point, creating substantial scarcity pricing. The generation mix at the time comprised relatively high hydro output (totalling approximately 2.54 GW across multiple entries) and moderate wind generation (approximately 634 MW), indicating that conventional supply-side constraints rather than insufficient generation were the primary driver of the extreme constraint value and associated price spikes.
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.