A high-value binding constraint (T_BLINK_TV_NGZ) with an exceptionally large shadow price of $7.308 million became active in Tasmania on 24 May 2026, indicating severe transmission congestion between Blink and Tassie Valley in the non-governed zone. Despite this extraordinary constraint value, regional pricing remained moderate at approximately $102–118/MWh, suggesting the constraint was binding on supply rather than directly driving marginal pricing.
The extreme shadow price on T_BLINK_TV_NGZ likely reflects a physical transmission limitation that prevented efficient energy transfer from Tasmania's abundant hydro generation (approximately 1350–1383 MW across the reporting period) to meet demand elsewhere, creating a severe scarcity rent for constrained flows. The coupling of high hydro output with minimal wind and zero OCGT generation, combined with the constraint's binding status, suggests Tasmania was unable to export surplus capacity, forcing suboptimal dispatch and imposing large economic losses on the interconnected system.
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.