Victoria (VIC1) experienced minor negative pricing during the 16:40–17:10 AEST period on 3 June 2026, with spot prices touching −$0.05/MWh across two intervals. The pricing occurred during a period of sustained high wind generation (approximately 3,600–3,625 MW) combined with brown coal baseload (2,959 MW), creating an oversupply condition in the region.
The negative pricing was driven by excess renewable generation (wind) that could not be economically absorbed, forcing marginal generators to pay for dispatch rather than receive revenue. The binding constraint F_T+RREG_0050 (likely a transmission constraint) with marginal values around $4.95–$5.95 suggests network limitations prevented efficient export of surplus wind output to neighbouring regions, compounding the supply imbalance and suppressing prices below zero.
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.