TAS1 · NEM — 5-min dispatch intervals
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Tasmania's electricity system is unique within the National Electricity Market, with hydroelectric generation supplying over 90 per cent of the state's power. This high share of dispatchable renewable energy gives Tasmania the lowest and most stable wholesale electricity prices in the NEM, with far fewer price spikes than mainland regions.
The state is connected to Victoria via Basslink, a 370-kilometre high-voltage direct current (HVDC) undersea cable. Basslink allows Tasmania to export surplus hydro generation to the mainland during periods of high prices and to import electricity when dam levels are low or demand is elevated.
With minimal fossil fuel generation and abundant hydro resources, Tasmania plays a distinctive role in the NEM as both a source of firm renewable energy and a provider of system services that support the stability of the broader national grid.