Tasmania experienced high renewable penetration at 90.4% during the evening of 3 August 2026, with hydro generation contributing approximately 2,438 MW and wind around 50 MW. Regional reference prices (RRP) rose notably from $65.14/MWh to $88.24/MWh across the five-minute settlement intervals, with a sharp increase in the final period.
The price elevation correlates with a binding constraint (F_T+RREG_0050) carrying consistent marginal values of $3.06–$3.07/MWh, which restricted network flow or reserve capacity during the high renewable generation period. The sustained binding status of this constraint across all settlement intervals suggests supply-side limitations or network congestion rather than demand-driven pressure, and the modest but repeated marginal value indicates the constraint was the active price setter despite abundant renewable supply in the region.
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.