A major binding constraint event occurred in the NEM with I_CTRL_ISSUE_BL reaching an extremely high shadow price of $26,912,000/MWh, indicating severe scarcity or inability to meet system requirements. This constraint was significantly more binding than concurrent secondary constraints, which exhibited marginal values in the range of $19–$35/MWh.
The exceptional magnitude of the I_CTRL_ISSUE_BL shadow price suggests a critical system condition where supply-demand balance or control requirements are severely constrained. The constraint's dominance over other binding constraints indicates this was the primary limiting factor in the dispatch; however, without generation mix, demand, or renewable availability data, the specific driver—whether supply shortage, network congestion relief, or system control requirement—cannot be definitively determined from the data provided.
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.