A major constraint event occurred in the NEM with two binding constraints (F_T+LREG_0050 and F_T+RREG_0050) both reaching an exceptionally high shadow price of $232,000/MWh. This represents a severe constraint on system operation, with multiple additional constraints also binding simultaneously at lower marginal values.
The simultaneous binding of F_T+LREG_0050 and F_T+RREG_0050 at identical shadow prices indicates a tightly coupled constraint situation affecting both left and right regulation services, suggesting systemic scarcity in regulation capability across the NEM. The elevated constraint value likely reflects either a critical shortage of available regulation resources or a transmission limitation preventing efficient redistribution of reserves, with the additional binding constraints (F_TASCAP_RREG_0220, F_I+RREG_0220) indicating compound operational stress across multiple parts of the system.
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.