Tasmania experienced high renewable energy penetration at 89.3% during the early morning period of 11 August 2026, with hydro and wind generation collectively dominating the supply mix. Regional reference prices ranged from $44.44 to $77.08/MWh across the nine settlement periods, with notable volatility in the $55–$77 band.
The binding constraints with the highest marginal values—particularly constraint F_T+NIL_MRWF_TG_R6 (marginal values ~$47–$51/MWh) and F_T+LREG_0050 (marginal value ~$41/MWh)—were the primary drivers of price variation during this high-renewable period. The persistent binding of these constraints, combined with the significant renewable output from hydro (1,706.46 MW total) and wind (932.99 MW total) generation sources, indicates that system balancing requirements and regional operating limits were constraining dispatch flexibility despite abundant clean energy 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.