A binding constraint (T_BLINK_TV_NGZ) with an exceptionally high marginal value of $7.308 million was active in TAS1 during the early morning period of 10 June 2026, creating significant transmission congestion. Regional prices remained moderate (ranging from $81.2 to $86.23/MWh) despite the extreme shadow price, suggesting the constraint was limiting demand response or export capability rather than driving price formation directly.
The binding constraint with the elevated marginal value indicates a transmission element was operating at or near its limit, preventing additional power flows that would otherwise relieve congestion. The generation mix at the time—dominated by approximately 1750 MW of hydro output and 800 MW of wind generation—suggests high renewable output coincided with constrained export or demand pathways, forcing the system to manage flows through a limited corridor with a binding constraint (T_BLINK_TV_NGZ) that carried a marginal value of $7.308 million per MWh of relief.
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.