SA1 experienced a moderate price spike to $379.99/MWh across two consecutive intervals (06:45 and 06:50 on 23 June 2026), representing a sharp $80/MWh increase from the preceding interval. The spike was brief and sharp, with prices returning to $189.15/MWh by 06:55, indicating a temporary localized constraint.
The binding constraint T_BLINK_TV_NGZ carried an exceptionally high marginal value of $7,308,000, indicating severe congestion on this transmission element during the spike intervals. Additionally, constraint F_T+NIL_MG_RECL_R6 appeared as a binding constraint with material marginal values ($189.98, $45.75, and $39.75), suggesting localized network congestion limited supply response to demand. The rapid price recovery to $189.15/MWh in the following interval indicates the congestion was transient, likely resolving as generation dispatch or network conditions normalised.
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.