A high-value binding constraint (F_T+NIL_MG_R6) emerged in the NEM with a shadow price of $4,419.79/MWh, indicating severe transmission congestion or network limitation in the Tasmanian interconnector or related regional constraint. This constraint dominated dispatch pricing, appearing multiple times across the binding constraint stack with the highest marginal value by a significant margin.
The elevated shadow price likely reflects tight supply conditions in Tasmania or southern regions, potentially driven by low hydro availability, high demand, or limited interconnector capacity on the Tasman Link or associated network elements. The repeated binding of this constraint across consecutive dispatch intervals suggests sustained transmission congestion rather than a transient event, forcing the market to reject lower-cost generation on one side of the constraint and accept higher-cost alternatives on the other, significantly elevating regional price differences.
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.