Project EnergyConnect
Location
CountryAustralia
StateSouth Australia and New South Wales
Coordinates33°57′22″S 139°07′37″E / 33.956°S 139.127°E / -33.956; 139.127
General directionWest–East
FromRobertstown, South Australia
Passes throughBuronga, New South Wales
ToWagga Wagga, New South Wales
Ownership information
PartnersElectraNet and TransGrid
Construction information
Construction started2022
Expected2025
Technical information
Typeoverhead transmission line
Type of currentAC
Total length900 km (560 mi)
Power rating800 MW
AC voltage330 kV
Websitewww.projectenergyconnect.com.au

Project EnergyConnect is a new electricity transmission line under construction which will connect the South Australia and New South Wales districts of the National Electricity Market in Australia. Riverlink was a previous working title for the project, drawn from a proposal first raised in 1999.[1] The Australian Energy Market Operator used RiverLink in its proposal for this interconnector, but the transmission companies in South Australia (ElectraNet) and New South Wales (TransGrid) now call it EnergyConnect.

South Australia and New South Wales already each have connections to Victoria, which also has a connection across Bass Strait to Tasmania, and New South Wales also has connections to Queensland. The connection between New South Wales and South Australia is intended to provide resilience and redundancy to the network. It is aimed to provide increased security of supply to South Australia and improve sharing of renewable energy with New South Wales.[2]

Construction of the new interconnector is expected to cost A$1.8 billion. It will be 900 kilometres (560 mi) long, from Robertstown to Wagga Wagga, New South Wales. It is proposed to have a spur from Buronga to Red Cliffs in Victoria.[3] Assessment of the Regulatory Investment Test for Transmission (RIT-T) began in June 2019.[4]

The link endpoints are at Robertstown in South Australia where major transmission lines connect to the north and south of the state, and Wagga Wagga, the furthest west in New South Wales that the high voltage lines reach. The new high-voltage line is expected to improve the feasibility of more solar and wind farms in the areas traversed by the line.[5]

The Australian Energy Market Commission changed its rules in April 2019 to streamline the regulatory process for several network upgrades including Project EnergyConnect. The change allows the Australian Energy Regulator to consider the proposals concurrently.[6] ElectraNet established information hubs near the South Australian part of the route to consult the public about the detailed route.[7] One of the concerns is that the proposed route crosses Calperum Station which is home to a critically endangered species, the black-eared miner.[8] New South Wales put the project on a fast-track development process by assigning it "critical infrastructure" status.[9] The Clean Energy Finance Corporation issued a $295 million debt instrument for the project in May 2021.[10][11]

A new substation will be built at Bundey, about 10 kilometres (6.2 mi) from Robertstown substation. The connection between those will operate at South Australia's transmission voltage of 275kV. The interconnector main line east from Bundey will operate at New South Wales voltage of 330kV. Substation construction contracts to build the new Bundey substation and expand Robertstown and Tungkillo substations were awarded to Consolidated Power Projects. The contract for the transmission lines to the South Australian border (200 kilometres (120 mi)) was let to Downer Utilities Australia.[12] Construction began with the first towers out from Robertstown on 15 February 2022. The connection to Buronga is expected to be completed late in 2023, and the full link to Wagga Wagga by early 2025.[13] Several power control items are to be connected to the line, including five 330 kV Phase Shifting Transformers, two synchronous condensers and four variable shunt reactors.[14]

References

  1. ^ MacKinnon, Duncan (26 July 2018). "RiverLink: Don't spend the savings all at once!". Australian Energy Council. Retrieved 31 August 2019.
  2. ^ "SA to NSW High Capacity Interconnector". Australia & New Zealand Infrastructure Pipeline. Infrastructure Partnerships Australia. 28 June 2019. Retrieved 14 July 2019.
  3. ^ Scopelianos, Sarah (13 February 2019). "Interconnector proposal between SA and NSW to 'reduce bills'". ABC News. Retrieved 14 July 2019.
  4. ^ Murphy, India (26 June 2019). "AER to review interconnector proposed by ElectraNet". Energy Magazine. Retrieved 14 July 2019.
  5. ^ Potter, Ben (29 July 2016). "Transgrid backs $500m NSW-SA interconnector to ease power crisis". Australian Financial Review. Retrieved 14 July 2019.
  6. ^ "Final rule to streamline the regulatory process for priority transmission projects". Australian Energy Market Commission. 4 April 2019. Retrieved 31 August 2019.
  7. ^ "Project EnergyConnect information hubs established across Riverland and Murraylands". ElectraNet. Retrieved 31 August 2019.
  8. ^ Peddie, Clare (20 June 2019). "BirdLife Australia says interconnector threatens a critically endangered bird, the black-eared miner". The Advertiser. Retrieved 31 August 2019.
  9. ^ Vorrath, Sophie (29 August 2019). "NSW puts interstate transmission link project on the fast-track". RenewEconomy. Retrieved 31 August 2019.
  10. ^ Parkinson, Giles (30 May 2021). "Transgrid commits to major new transmission link after CEFC steps in". RenewEconomy.
  11. ^ Parkinson, Giles (7 June 2021). "ElectraNet approves landmark "freeway" for wind, solar and storage". RenewEconomy. Archived from the original on 7 June 2021.
  12. ^ "Major construction contracts awarded for SA component of new interconnector with NSW". ElectraNet. 11 October 2021. Retrieved 15 February 2022.
  13. ^ Parkinson, Giles (15 February 2022). "First poles erected in $2.4bn transmission link to create "renewables superpower"". Renew Economy. Retrieved 19 February 2022.
  14. ^ Williamson, Rachel (19 June 2023). "Huge 374 tonne machine travels 900km to join NSW renewable super highway". RenewEconomy.
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