A severe binding constraint on the Quorn to Playford network path (C_N_QUORNP_009_L_H) in the NEM resulted in an exceptionally high shadow price of $7.308 million, indicating extreme scarcity of transmission capacity on this critical link. This constraint binding far exceeded typical network limitations, suggesting a significant supply-demand imbalance or generation configuration that created bottleneck conditions on South Australia's interconnecting infrastructure.
The extraordinarily high marginal value indicates severe congestion on the Quorn-Playford transmission corridor, likely driven by high demand in South Australia coinciding with constrained local generation or unfavourable renewable output, forcing reliance on imports via this critical pathway. The constraint binding suggests that the network operator had to restrict flows significantly to maintain system security, creating substantial price separation between regions and reflecting the scarcity value of available transmission capacity 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.