A binding constraint (F_T+NIL_MRWF_TG_R6) with a shadow price of $381.55/MWh emerged as a significant constraint in the NEM, indicating substantial economic scarcity at a specific network location. This constraint ranked third among active binding constraints in terms of marginal value, suggesting localised transmission or generation limitations were materially affecting dispatch and pricing.
The high shadow price reflects supply-demand imbalance at the constrained location, with the constraint limiting the ability to relieve local scarcity through additional generation or imports. The concurrent binding of multiple constraints, including the substantially higher-valued T_BLINK_TV_NGZ constraint ($8.352M/MWh), indicates system-wide transmission congestion across multiple interconnection points, which collectively restricted the market's capacity to respond to demand and elevated locational price signals.
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.