A binding constraint (T_BLINK_TV_NGZ) with an exceptionally high shadow price of $8.352 million per MWh occurred in TAS1 on 28 July 2026 around 12:45 AEST, coinciding with a sharp spike in regional reference price to $2.26/MWh. The event was followed by negative pricing within 10 minutes, suggesting rapid supply-demand rebalancing or constraint relief.
The extremely elevated marginal value of the T_BLINK_TV_NGZ binding constraint indicates severe transmission or operational limitations in Tasmania during this period. The transient nature of both the constraint shadow price and the price spike, coupled with the subsequent negative pricing, suggests the constraint became acutely binding during a brief supply-demand imbalance, possibly as hydro and wind generation (which collectively represented the majority of the generation mix) interacted with network topology limitations or ramping requirements.
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.