A major binding constraint event occurred in TAS1 on 3 July 2026, with the constraint T_BLINK_TV_NGZ reaching an extremely high shadow price of $8.352 million, indicating severe congestion or operational limits. Spot prices in Tasmania remained relatively stable in the $36–55 range throughout the period, with notable dips around 12:50 and 13:05, before rising to $55.65 by 13:20.
The extraordinarily high marginal value of the T_BLINK_TV_NGZ binding constraint suggests a critical physical or operational limit was reached, with only minimal incremental generation capacity available to relieve the constraint. Tasmania's generation profile showed substantial hydro and wind output (approximately 900–1134 MW of hydro and 437–503 MW of wind during the window), which, combined with the binding constraint's severity, indicates the constraint was limiting the system's ability to import or export power or to operate generation at desired levels rather than reflecting a shortage of total generation capacity.
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.