SA1 experienced sustained negative pricing across two consecutive intervals (14:25–14:30 on 08 August 2026), with prices reaching −$0.05/MWh. The region was generating predominantly from wind (1,910 MW) with minimal demand absorption from scheduled generation, creating localised oversupply conditions.
The negative pricing reflects a surplus generation position in SA1 driven by high wind output (1,910 MW) relative to local demand and export capacity. The binding constraint F_T+RREG_0050 with a marginal value of $3.44/MWh indicates that network or regional regulation requirements were actively constraining the dispatch solution, preventing generators from reducing output or forcing continued generation into an already-oversupplied market, thereby pushing prices negative as the marginal cost of managing the constraint exceeded the value of generation.
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.