NSW1 experienced sustained negative pricing at –$4/MWh across two consecutive intervals (03:00–03:05 on 7 August 2026), representing a minor market event. This occurred during a period of high solar generation (3,416 MW) and substantial wind contribution (282 MW) offsetting moderate coal-fired output (3,578 MW), with minimal gas generation online.
The negative pricing reflects a structural over-supply condition during early morning hours when solar generation was at elevated levels whilst demand remained low. A binding constraint (F_T+RREG_0050) with marginal values in the $3.73–$4.31/MWh range suggests transmission or network security limitations prevented efficient distribution of surplus generation, forcing the spot price into negative territory to incentivise load acceptance and curtail 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.