Tasmania achieved 100% renewable generation during the early morning period of 23 August 2026, with hydro, wind, and rooftop solar providing all generation capacity. Regional reference prices exhibited significant volatility, ranging from −$2.96/MWh to $64.20/MWh across the six consecutive five-minute settlement periods, suggesting rapid changes in system conditions or constraints.
The price volatility and constraint binding patterns indicate that interconnector or network constraints became progressively tighter during this period, with binding constraint F_T+RREG_0050 reaching a marginal value of $28.18 and multiple instances of F_TASCAP_RREG_0220 binding with marginal values ranging from $6.80 to $10.44. The escalating prices toward the end of the interval, combined with persistent constraint binding, suggest that high renewable generation within Tasmania was increasingly unable to meet regional demand or export requirements without triggering capacity constraints, forcing prices upward despite the region's abundant renewable supply.
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.