VIC1 experienced minor negative pricing for two consecutive intervals (10:50–11:00) on 2 June 2026, with the Renewable Energy Rate (RRP) reaching −$0.05/MWh. This brief negative pricing event followed a sharp price collapse from $5.56/MWh to near-zero levels, indicating a sudden supply–demand imbalance in the region.
The negative pricing was primarily driven by oversupply from high wind generation (approximately 6,651 MW combined across VIC1), which overwhelmed the region's demand during the mid-morning period when dispatchable generation (coal at 3,926 MW) could not be rapidly curtailed. Network constraints—particularly binding regulations on the main transmission corridor (F_MAIN+RREG_0220 with marginal values of ~$5–$10/MWh)—prevented efficient export of surplus wind energy to neighbouring regions, forcing the spot price into negative territory to incentivise load curtailment and discourage marginal generation.
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.