
The electricity grid in New South Wales (NSW) is owned and operated by a number of different companies, including Transgrid and Ausgrid. Transgrid, a manager and operator of high-voltage electricity transmission networks in NSW and the Australian Capital Territory (ACT), began as a statutory authority under the Electricity Transmission Authority Act 1994 and was corporatized in 1998. Ausgrid, on the other hand, is an electricity distribution company that owns and operates electrical networks serving approximately 4 million people in Sydney, the Central Coast, and Hunter regions of NSW. It was formed in 2011 from the previously state-owned EnergyAustralia and was wholly owned by the NSW Government until 2016, when a 50.4% stake was leased to a consortium of foreign companies.
| Characteristics | Values |
|---|---|
| Name | Transgrid |
| History | Began as the trading name of the Electricity Transmission Authority, established on 1 February 1995 as part of the break-up of the Electricity Commission of New South Wales. Corporatised and renamed in December 1998. |
| Function | Manages and operates the high-voltage electricity transmission network in New South Wales and the Australian Capital Territory. |
| Coverage | Network spans over 4000 km across NSW, the ACT, and Victoria. |
| Technology | Transgrid Telecommunications manages an extensive fibre optic network, making it one of the largest optical fibre networks in Australia. |
| Ownership | In December 2015, a consortium called NSW Electricity Networks acquired a 99-year lease of Transgrid's transmission network for $10.3 billion. The consortium consists of Spark Infrastructure (15%), the Utilities Trust of Australia fund (20%), the Canadian pension fund Caisse de depot et placement du Quebec (25%), the Abu Dhabi Investment Authority (20%), and the Kuwait Investment Authority (20%). |
| Notable Bidders | State Grid Corporation of China, in consortium with Macquarie Infrastructure Real Assets, was a notable bidder but was unsuccessful, possibly due to its government and military connections. |
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What You'll Learn
- Transgrid: Manager and operator of NSW's high-voltage electricity transmission network
- Ausgrid: Operates and maintains NSW's complex electricity network
- NSW Electricity Networks: Consortium that won the 99-year lease for Transgrid
- Foreign ownership: Bidding for Ausgrid by Chinese and Hong Kong consortium was blocked in 2016
- National Electricity Market (NEM): Transgrid is part of this market, providing its backbone

Transgrid: Manager and operator of NSW's high-voltage electricity transmission network
Transgrid is the manager and operator of New South Wales' high-voltage electricity transmission network. It is also responsible for the Australian Capital Territory's network and is part of the National Electricity Market (NEM).
Transgrid was established in 1995 as the Electricity Transmission Authority, a statutory authority formed during the break-up of the Electricity Commission of New South Wales. It was corporatised in 1998, becoming Transgrid, and is now a major player in Australia's electricity industry.
The company has a vast physical footprint, with offices in several NSW cities, including Sydney, Newcastle, Orange, Tamworth, Wagga Wagga, and Yass. It also manages an extensive fibre optic network, covering over 4000 km across NSW, the ACT, and Victoria. This telecommunications network is one of Australia's largest optical fibre networks, with most of the network's Optical Ground Wire (OPGW) strung above the electricity transmission network.
In 2015, a consortium called NSW Electricity Networks successfully bid for a 99-year lease of Transgrid's transmission network for $10.3 billion. The consortium consists of Australian, Canadian, and Middle Eastern entities, including Spark Infrastructure, the Utilities Trust of Australia, and the Abu Dhabi Investment Authority.
Transgrid is committed to supporting the transition to a cleaner energy future. It builds and maintains Australia's largest electricity network, ensuring reliable supply to customers across the NEM.
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Ausgrid: Operates and maintains NSW's complex electricity network
Ausgrid is an electricity distribution company that operates and maintains a complex electricity network in New South Wales, Australia. The company owns and maintains the poles, substations, wires, and cables that make up the electricity distribution network in Sydney, the Central Coast, and the Hunter Region. Covering 22,275 square kilometres, it is one of the largest electricity networks in the world.
Ausgrid supplies electricity to over 1.8 million customers, serving more than 4 million people in these regions. The company was formed in 2011 from the previously state-owned EnergyAustralia, when the retail division and brand were sold, and the remainder was renamed Ausgrid. From 2011 to 2016, Ausgrid was wholly owned by the NSW Government. In 2016, the NSW Government offered a 50.4% stake through a 99-year lease, which was initially won by a consortium of State Grid Corporation of China and Cheung Kong Infrastructure Holdings. However, the Federal Government blocked this proposal, citing national security concerns.
Ausgrid has a strong focus on safety and reliability, investing heavily in maintenance and upgrades to meet customer expectations. The company also has a commitment to sustainability and renewable energy, with initiatives such as adopting electric vehicles and trialling fairer pricing models to support network stability.
Ausgrid has faced some criticism and complaints regarding stakeholder management and community consultation. Residents from certain suburbs have protested against proposed electricity infrastructure installations without proper consultation. Despite these issues, Ausgrid remains a dynamic company in NSW, employing a knowledgeable and skilled team to maintain and operate its complex electricity network.
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NSW Electricity Networks: Consortium that won the 99-year lease for Transgrid
In 2015, a consortium called NSW Electricity Networks won the bid for a 99-year lease of Transgrid's transmission network for $10.3 billion. Transgrid is the manager and operator of the high-voltage electricity transmission network in New South Wales and the Australian Capital Territory, Australia, and is part of the National Electricity Market (NEM).
The consortium consists of two Australian entities, Spark Infrastructure (15%) and the Utilities Trust of Australia fund (20%), the Canadian pension fund Caisse de depot et placement du Quebec (25%), and two Middle Eastern sovereign wealth funds, the Abu Dhabi Investment Authority (20%) and the Kuwait Investment Authority (20%).
The lease deal with the Australian-led consortium was praised by NSW Premier Mike Baird as a "stunning" result, highlighting the importance of foreign investment in participating in the global market. The consortium became the biggest player in the national electricity grid, taking over part of the Federal Government's fibre optic network and control of much of the nation's backup electricity supply.
The successful bid for the TransGrid lease was part of the New South Wales Government's plan to lease power assets to raise funds for infrastructure investment. With the lease deal, the consortium took on the responsibility of managing and maintaining a critical part of the state's electricity infrastructure, ensuring the reliable delivery of electricity to homes and businesses across New South Wales.
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Foreign ownership: Bidding for Ausgrid by Chinese and Hong Kong consortium was blocked in 2016
The Australian electricity market is a complex mix of government and private ownership. Of Australia's eight states and territories, three governments retain full ownership of all elements of their electricity networks: Western Australia, Tasmania, and the Northern Territory. Queensland also owns the generation, distribution, and transmission of electricity, but the retail market has been privatized.
In 2016, a consortium of Chinese and Hong Kong bidders made a bid for a 99-year lease of a 50% stake in Ausgrid, one of the three main electricity distributors in NSW. Ausgrid has operated and maintained a complex electricity network spanning 22,275 square kilometers along Australia's east coast. The consortium included the Chinese Government-owned State Grid Corp and Hong Kong-listed Cheung Kong Infrastructure.
However, the bid was blocked by Federal Treasurer Scott Morrison, who cited “national security concerns." Morrison did not detail the specific concerns but mentioned that they were not country-specific and related to the transaction structure and the nature of the assets. The decision was a setback for the NSW government, which hoped to raise funds for infrastructure projects through the lease.
The Ausgrid decision sparked debate and political reactions. NSW Opposition raised concerns about power price increases after the poles and wires sell-off. The Construction, Forestry, Mining, and Energy Union (CFMEU) had previously run an advertising campaign against State Grid Corporation's possible investment in the network, warning that "selling the electricity network ... to another country is just not on." The decision highlighted the sensitive nature of foreign investment in critical infrastructure and the potential impact on Australia's national security.
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National Electricity Market (NEM): Transgrid is part of this market, providing its backbone
The National Electricity Market (NEM) is a large-scale electricity industry that provides energy to the entire country of Australia, except for Western Australia and the Northern Territory. Transgrid, the manager and operator of the high-voltage electricity transmission network in New South Wales (NSW) and the Australian Capital Territory (ACT), is an integral part of the NEM, providing its backbone.
Transgrid was established in 1995 as the Electricity Transmission Authority, a statutory authority under the Electricity Transmission Authority Act 1994, during the break-up of the Electricity Commission of New South Wales. In 1998, the authority was corporatised and renamed Transgrid. The company's major transmission projects ensure a reliable supply of electricity to customers across the NEM.
Transgrid's telecommunications network, with over 15 years of experience, is one of the largest optical fibre networks in Australia, spanning more than 4000 km across NSW, the ACT, and Victoria. The majority of the network's Optical Ground Wire (OPGW) is strung above the electricity transmission network.
In December 2015, a consortium called NSW Electricity Networks successfully bid for a 99-year lease of Transgrid's transmission network for $10.3 billion. The consortium consists of Australian, Canadian, and Middle Eastern entities, including Spark Infrastructure, the Utilities Trust of Australia, and the Abu Dhabi Investment Authority.
Transgrid plays a crucial role in the NEM by building and maintaining Australia's largest electricity network, facilitating the transition to a cleaner energy future, and ensuring the reliability of electricity supply to customers.
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Frequently asked questions
Transgrid owns the electricity grid in NSW.
Transgrid is the manager and operator of the high-voltage electricity transmission network in NSW and the Australian Capital Territory. It is part of the National Electricity Market (NEM).
Transgrid provides electricity to customers across the National Electricity Market.
Transgrid Telecommunications manages an extensive fibre optic network covering over 4000 km across NSW, the ACT, and Victoria.











































