A high-value binding constraint (F_T+NIL_ML_L6) with a shadow price of $2,497.53/MWh has emerged in the NEM, indicating severe network congestion or operational limitation. This constraint is dominating the market dispatch and significantly elevating marginal pricing, with secondary binding constraints present at substantially lower marginal values ($71–84/MWh).
The extremely high shadow price on F_T+NIL_ML_L6 indicates this constraint is the active limiter on power flows or system capability in the affected corridor. The presence of multiple simultaneous binding constraints at lower marginal values suggests the network is operating under tight conditions; the primary constraint is preventing relief via alternative pathways, forcing the market to accept the steep price signal rather than accommodate additional demand or supply variation.
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.