TAS1 experienced sustained negative pricing at approximately −$4.62/MWh across two consecutive intervals (00:20 and 00:25 on 23 August 2026). This minor event occurred during a period of elevated renewable generation, with combined hydro and wind output exceeding 900 MW alongside rooftop PV contribution.
The negative pricing reflects an oversupply condition where local generation exceeded immediate demand requirements. A binding constraint (F_T+RREG_0050) with a marginal value of $4.22 was active across both intervals, indicating physical or operational limits that prevented efficient export or generation adjustment, forcing prices negative to incentivise demand response or generation curtailment.
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.