A high-value binding constraint (T_BLINK_TV_NGZ) with a marginal value of $7.308 million per MWh emerged in Tasmania on 21 June 2026 during the early morning period, coinciding with a notable price spike from $71.24 to $79.27 across five consecutive 5-minute intervals. This represents an exceptional constraint severity that significantly elevated spot prices in the region.
The binding constraint T_BLINK_TV_NGZ, with its extremely high shadow price, directly constrained electricity dispatch and drove the observed price elevation during this period. The constraint remained active across multiple dispatch intervals whilst Tasmania's generation mix was dominated by approximately 1100–1200 MW of hydroelectric output with minimal wind contribution, suggesting the constraint was limiting available supply pathways despite adequate total 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.