A binding constraint (F_S+TBTU_L1) exhibited a moderately elevated shadow price of $235/MWh in the NEM, indicating locational scarcity in the region it constrains. The same constraint appeared multiple times in the dispatch interval stack with varying marginal values ($235, $96, $66.60, and $16.89/MWh), suggesting sequential constraint binding across different dispatch periods or dispatch layers.
The elevated marginal value of $235 on the F_S+TBTU_L1 constraint indicates that demand at that location exceeded available transmission capacity during that interval, creating a supply-demand imbalance that elevated the spot price at that node. The presence of a concurrently binding constraint (T_BLINK_TV_NGZ) with an exceptionally high shadow price of $7.308M/MWh suggests a more severe constraint event was simultaneously active elsewhere in the NEM, which may have displaced generation and exacerbated locational scarcity on the F_S+TBTU_L1 constraint.
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.