AEMO sets final go-live plan for Project EnergyConnect as Transgrid completes 900km NSW link
The Australian grid operator's final plan lands after construction finished on the country's largest interconnector, with AU$964m in net consumer benefits on the line.
AEMO has published the final version of its go-live plan for Project EnergyConnect, the transmission link spanning South Australia and New South Wales. The plan, reported by WattClarity on 2026-08-07, formalises commissioning and market-entry arrangements for Australia's largest transmission project.5
That matters for NEM participants because EnergyConnect changes the supply-demand balance between two of the grid's largest regions, and a finalised go-live plan means the interconnector is moving from construction into commercial operation.5,3
Transgrid confirmed construction on the NSW section is complete. The 900km interconnector comprises three stages, with the first a 160km line running from the South Australian border, and the full NSW section now fully energised.3
The project's economics are large for a single transmission asset. Transgrid puts gross market benefits at AU$4.2 billion, with net market benefits of AU$964 million for energy consumers.3
Scale shows in the build. More than 10 million worker hours went into the NSW section alone, with 1,508 towers and monopoles consuming 46,068 tonnes of steel and 10,385km of conductor cabling, enough by Transgrid's count to span Sydney to Perth three times.3
Beyond bill impacts, EnergyConnect is designed to integrate new renewable generation in the Riverina and South West NSW into the NEM. That footprint overlaps the NSW South-West renewable energy zone, where projects including RWE's are under development. Moving power between two regions with different weather and renewable profiles is the core function of the link.3
The go-live plan did not arrive on the original schedule. AEMO flagged workload constraints earlier in the year, triggering a rethink of IPRR implementation toward a staged delivery path, according to WattClarity reporting on 2026-06-02. Whether the final plan reflects that staged approach is not detailed in the available material.2
Australian electricity and gas markets have also been absorbing a separate policy push. Data centres are facing pressure to source 40% of their electricity from wind power under performance-linked measures, though Queensland and the Northern Territory have not signalled support for mandating that data centres invest in renewables, per a legal update covering August 2026.6
Gas pricing at Wallumbilla settlement was A$10.83/GJ on 2026-09-21, up 4.13%, a reminder that east-coast gas remains the marginal input for a slice of NEM peaking generation even as renewables build.5
The global context is not decoupled. Japan's Long-Term Decarbonized Power Auction has awarded 10.1 GW of capacity to LNG-related projects across its first three rounds, signalling continued regional gas demand.1 On the other side of the Pacific, Argentina LNG, backed by YPF, Eni and Abu Dhabi-based XRG, has applied for RIGI inclusion as its partners target a final investment decision, with plans for two floating liquefaction vessels off Río Negro province totalling 12 million tonnes per year.4
Those are separate supply stories, but they matter to Australian gas because export parity at Gladstone and the North West Shelf sets the opportunity cost of domestic molecules. A tighter LNG investment cycle abroad makes the case for keeping east-coast gas in the ground harder to argue.4,1
For NEM traders, the practical question is how EnergyConnect's flows settle once commissioning is fully complete. Interconnector go-live typically widens the arbitrage between regional reference prices, and with the NSW South-West REZ adding generation on one side of the link, the historical spread between SA and NSW pricing has room to compress or invert depending on renewable output and gas-fired fill-in.3,2
AEMO has not signalled a delay to the finalised schedule in the material available. The next concrete signal is the first full dispatch interval under the final go-live arrangements, which will show how the market clears across the new interface.5