TAS1 experienced sustained negative pricing at approximately $-0.05 to $-0.10/MWh across two consecutive intervals (03:05–03:10) on 22 August 2026. The event occurred during the early morning low-demand period with high renewable generation from wind (334–465 MW) and hydro (261–317 MW) sources.
The negative pricing reflects surplus renewable generation during low overnight demand, with wind and hydro combined contributing over 700 MW. Multiple binding constraints with marginal values between 3.38 and 5.0 indicate transmission or regional regulation limitations prevented efficient export or load-balancing, forcing the market price downward as dispatchable generation was not required to meet demand.
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.