Tasmania experienced high renewable penetration of 91.7% during the settlement interval, driven by substantial hydroelectric generation (2,498 MW) and wind output (1,059 MW) offsetting minimal gas-fired generation (249 MW). Regional prices rose progressively from $55.14/MWh to $67.26/MWh over the six-interval period, indicating tightening system conditions despite high renewable supply.
The price trajectory appears driven by binding constraints rather than renewable generation scarcity, with multiple constraint equations (F_TASCAP_RREG_0220, F_TASCAP_LREG_0210, and F_T+RREG_0050) exhibiting marginal values of $3.94–$4.97/MWh, suggesting physical or operational limits were restricting further supply injection. The steady price rise despite abundant renewable generation indicates that constraint-driven scarcity, likely related to system security or network capability limits, was the primary driver of pricing escalation rather than renewable output variability.
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.