A high-value binding constraint (T_BLINK_TV_NGZ) with an exceptionally large shadow price of $8.352 million occurred in TAS1 during the evening of 14 September 2026, coinciding with a period of declining regional prices from $56.32/MWh to $41.14/MWh. The constraint remained the dominant binding constraint throughout the 25-minute window, with regional generation comprising substantial hydro (approximately 1164–820 MW), wind (375–444 MW), and modest gas OCGT (124–125 MW) contributions.
The extreme shadow price on the T_BLINK_TV_NGZ binding constraint indicates severe physical or operational scarcity in the transmission network element it governs, creating significant marginal cost for additional flow. The concurrent decline in regional spot prices suggests that local generation supply was increasing relative to demand during this period, yet the constraint remained binding, indicating that the transmission limitation—rather than energy scarcity—was the primary driver of market value. The secondary binding constraints with substantially lower marginal values confirm that T_BLINK_TV_NGZ was the active bottleneck limiting market dispatch and regional exports.
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.