Tasmania (TAS1) experienced high renewable penetration of 88.6% during the morning of 12 August 2026, with hydro and wind generation collectively providing approximately 2,372 MW across the observed period. Regional electricity prices ranged from $38.50/MWh to $69.73/MWh, with volatility evident across the five-minute settlement intervals.
The price volatility during this high-renewable penetration period was driven by binding constraint F_TASCAP_RREG_0220, which maintained marginal values between $7.77/MWh and $8.99/MWh throughout the interval. This constraint's consistent binding status indicates it was active in limiting available capacity, which likely contributed to upward pressure on prices despite the abundance of low-marginal-cost renewable generation; the constraint's marginal value represents the economic cost of its limitation on system flexibility or interconnector capacity.
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.