A major binding constraint event occurred in the NEM with F_S+TBTU_R1 reaching an exceptionally high shadow price of $208,800/MWh, indicating severe congestion or network limitation. This constraint significantly dominated the price signal in the market during this period, with a marginal value approximately 2,000 times higher than secondary binding constraints.
The extremely elevated shadow price on F_S+TBTU_R1 suggests a critical supply-demand imbalance or network congestion that AEMO's dispatch algorithm could only resolve through substantial price signals. The presence of multiple binding constraints at substantially lower marginal values ($97–$100/MWh) indicates F_S+TBTU_R1 was the primary limiting factor constraining system operation, likely reflecting either insufficient generation capacity relative to demand in a particular region or a physical network limitation preventing efficient energy transfer.
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.