SA1 experienced high renewable penetration of 89.2% during the evening of 28–29 August 2026, with solar and wind generation totalling over 928 MW across the captured intervals. Regional real-time prices were highly volatile, ranging from −$6.02/MWh to $14.19/MWh, reflecting the rapid variability in renewable supply.
The binding constraint F_T+LREG_0050 held consistently across all five settlement periods with marginal values declining from $25.51/MWh to $6.91/MWh, indicating a progressively relaxing physical limitation. The volatile price outcomes—including two negative-price intervals—align with the high instantaneous renewable generation and the constraint's marginal cost profile, which directly influenced dispatch economics and pricing in those periods.
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.