South Australia (SA1) experienced high renewable penetration of 89.3%, driven predominantly by wind generation of approximately 1,030 MW with minimal solar and battery contribution. Regional electricity prices showed volatility across the settlement period, ranging from $49.02/MWh to $76.67/MWh, with a general downward trend as renewable output dominated the generation mix.
The high renewable penetration reflects strong wind generation during the period, which typically exerts downward pressure on wholesale prices through increased supply. However, price volatility and the presence of multiple binding constraints with marginal values (F_T+LREG_0050 at $9.08 and $6.53/MWh, and F_TASCAP_RREG_0220 at $4.95 and $3.67/MWh) indicate that network or system security constraints were active and contributing to price variations, limiting the full pass-through of renewable supply benefits to lower prices.
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.