A high-value binding constraint F_T+NIL_MG_RECL_R6 with a marginal value of $3908/MWh became active in the NEM, significantly elevating dispatch costs. This constraint was the dominant cost driver in the dispatch period, with the next-highest binding constraint valued at only $6.79/MWh, indicating a severe and isolated transmission or operational limitation.
The extremely high shadow price on F_T+NIL_MG_RECL_R6 relative to other binding constraints suggests a critical capacity or operational bottleneck was reached, forcing costly out-of-merit generation dispatch or limiting load serving capability. Without generation mix or pricing data, the underlying physical cause cannot be definitively attributed, but the magnitude of the marginal value indicates a tight or saturated constraint that materially constrained power system operation during this period.
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.