Sydney, NSW – October 4, 2026 – Transgrid has announced a significant stride in the modernisation of Australia’s electricity grid, with the completion of the first major 150-kilometre section of the New South Wales component of Project EnergyConnect. This crucial milestone, reached on October 2, 2026, marks the connection between the Buronga substation near Wentworth and the new Dinawan substation near Coleambally, paving the way for initial energisation testing of the 330kV transmission line.
Project EnergyConnect, a vital interconnector between NSW and South Australia, is a cornerstone of the National Electricity Market’s (NEM) transition, designed to bolster grid stability, enhance reliability, and unlock vast renewable energy resources. The completion of this substantial segment is a tangible step towards its full operational status, now projected for late 2027.
Boosting Grid Capacity and Renewable Integration
The newly completed 150km section is part of Transgrid’s broader commitment to delivering a robust transmission network capable of integrating the anticipated influx of renewable energy, particularly from the South West and Central West Orana Renewable Energy Zones (REZs) in NSW. This infrastructure is critical for reducing network congestion and ensuring that clean energy generated in regional areas can efficiently reach demand centres.
Transgrid CEO, Brett Redman, stated, “The energisation of this first 150km stretch is a testament to the immense effort and collaboration involved in delivering a project of this scale. It brings us significantly closer to a future where more affordable, clean energy powers Australian homes and businesses, while simultaneously strengthening the backbone of our national grid.”
The transmission line is initially configured for 330kV operation but has been designed and built to accommodate a future upgrade to 500kV, demonstrating a forward-looking approach to meet escalating energy demands and support deeper electrification across the economy. Such grid upgrades are essential for consumers looking to Electrify Your Home in 2026: Real Costs, Rebates & Savings Up to $15,000+ and reduce their reliance on fossil fuels.
Project Costs and Economic Impact
The NSW portion of Project EnergyConnect has seen its cost estimate revised slightly to AUD $3.4 billion, up from an earlier estimate, primarily due to ongoing global supply chain pressures and increased labour costs within the construction sector. The overall project budget, encompassing both the NSW and South Australian sections managed by Transgrid and ElectraNet respectively, remains around AUD $3.8 billion. This substantial investment underscores the scale required to modernise Australia’s energy infrastructure.
“Project EnergyConnect is forecast to deliver AUD $4 billion in net market benefits, reducing wholesale electricity costs for consumers and supporting thousands of construction jobs.”
This investment is expected to deliver significant economic benefits, including thousands of direct and indirect jobs during construction and ongoing operational roles. Furthermore, by enabling more efficient energy transfer, it is projected to put downward pressure on wholesale electricity prices, ultimately benefiting Australian households and businesses.
The Broader Picture: A Stronger, More Resilient NEM
The completion of this section aligns with the Australian Energy Market Operator’s (AEMO) Integrated System Plan (ISP), which identifies Project EnergyConnect as a critical actionable transmission project. Interconnectors are vital for the NEM’s stability, allowing states to share generation capacity and manage demand fluctuations more effectively. This reduces the risk of power outages and enhances overall system resilience, particularly as more variable renewable energy sources come online. For those considering energy independence, a robust grid also reduces the pressure on Off-Grid Solar Costs Australia 2026: Your $25,000+ Guide to Energy Independence.
Other major transmission projects, such as VNI West and Marinus Link, are also progressing across the country, forming a comprehensive strategy to build a future-proof national grid. These projects collectively aim to unlock over 26 GW of new renewable energy generation and storage, transforming Australia’s energy landscape.
With initial energisation trials now imminent for the Buronga-Dinawan section, Project EnergyConnect is moving steadily towards its late 2027 full commissioning. This development represents a tangible step forward in Australia’s journey towards a cleaner, more reliable, and ultimately more affordable energy future.
Key Project EnergyConnect Milestones (NSW Section)
| Milestone | Date | Details |
|---|---|---|
| Initial Major Section Completion | October 2, 2026 | 150km Buronga-Dinawan section completed, enabling energisation trials. |
| NSW Cost Estimate Revision | October 2026 | Revised to AUD $3.4 billion due to supply chain and labour costs. |
| Full Project Operational Target | Late 2027 | Target for complete interconnector functionality. |
Transgrid continues to work across the remaining sections of the NSW interconnector, with construction activities ongoing to meet the late 2027 completion target. The successful delivery of this first major segment provides confidence in the project’s trajectory and its eventual benefits for the entire NEM.