Wednesday night into Thursday delivered a mixed NEM session: SA1 ran near-zero or negative pricing continuously from roughly 23:15 AEST — driven by high wind output — while TAS1 punched above $150/MWh in overnight intervals before settling back to the high $70s by 06:30 AEST. VIC1 touched near-zero at the open of Friday morning load build (spot at $0/MWh, demand 5,567 MW at 06:25 AEST), and QLD1's morning peak pushed demand to 7,907 MW with prices reaching $97–$111/MWh before pulling back. Watch the VIC1–NSW1 interconnector today: it sat at its export ceiling of 940.65 MW, binding hard on the export limit, which has been the primary driver of the NSW1–VIC1 price spread.
Tasmania was the standout region over the past 24 hours. A major binding constraint — T_BLINK_TV_NGZ — fired twice, carrying an exceptional shadow price of $7.308 million/MWh, coinciding with a spot spike to $200.24/MWh overnight and sustaining elevated prices around $97/MWh across several intervals. Separately, between 20:05 and 20:35, TAS1 achieved 100% renewable penetration, with hydro supplying ~888 MW and wind contributing 162–190 MW; prices held steady in the $77.95–$82.49/MWh range throughout. The two events together — a major transmission constraint and a clean-generation milestone — made TAS1 the most active region on the board.
Western Australia's wholesale market recorded the highest 24-hour average across all six regions at $132/MWh, with an intraday high of $190/MWh. No specific dispatch events or constraint flags were reported in the data available for this period. The elevated average is notable relative