Tasmania's electricity market experienced a major binding constraint event on the Tasmanian-Blinkwater-Tuggerah 330kV interconnector (T_BLINK_TV_NGZ), with an exceptionally high shadow price of $7.31 million per MWh, indicating severe transmission congestion limiting power flow. Regional electricity prices fluctuated between $96.14–$110.20/MWh during the 05:25–06:00 settlement period, reflecting the constraint's impact on dispatch and pricing.
The constraint binding was likely driven by a combination of high demand during early morning peak (05:35–05:45 settlement intervals) coinciding with transmission network limitations on the Blinkwater-Tuggerah interconnector. Tasmania's generation mix was dominated by hydro output (~1200–1370 MW), with minimal wind contribution, suggesting limited dispatch flexibility to relieve the constraint through alternative generation routing, forcing the market to pay the extreme shadow price to constrain demand and balance the interconnector flow.
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.