Drive the Western Highway out past Bacchus Marsh and you’ll start seeing the easements being cleared for steel lattice towers, wide brown scars cutting across paddocks that haven’t had anything bigger than a grain silo on them in a century. That’s Western Renewables Link under construction, and it’s the project that tells you most of what you need to know about where AusNet Services sits in the Victorian grid right now: a regulated utility that answers to the AER on one side of its business, and a private infrastructure asset answering to a Canadian pension-fund consortium on the other.
AusNet Services isn’t a household name the way AGL or Origin are, and that’s partly the point. It doesn’t sell electricity to anyone. It owns and runs the wires that electricity travels through across most of Victoria: the sole electricity transmission network operator for the state, plus a distribution network covering a chunk of eastern Melbourne and the Latrobe Valley, plus a gas distribution network on top of that. If you live in Victoria you very likely pay AusNet something every quarter, whether you’ve ever heard the name or not.
From ASX listing to Brookfield’s portfolio #
AusNet floated on the ASX back in 2015 as the privatised successor to Victoria’s old state electricity transmission and distribution assets, majority owned by Singapore Power for years before that. The company’s run as a public company ended in 2022, when a consortium led by Brookfield Asset Management won a competitive bidding process against APA Group and took AusNet private in a deal valuing the business at close to $18 billion including debt. That number matters because it tells you the scale of what’s being managed here. This isn’t a boutique network, it’s one of the biggest pieces of regulated energy infrastructure in the country.
Being owned by Brookfield rather than listed on the ASX changes the reporting rhythm more than it changes the underlying business. AusNet still has its revenue set through the AER’s regulatory determinations, the same five-yearly process that governs every other distribution and transmission business in the NEM. What privatisation did was remove the quarterly scrutiny of public shareholders and hand long-term capital decisions to a fund manager with a multi-decade infrastructure horizon. Whether that’s good or bad for Victorian energy users depends on who you ask, and I don’t think the honest answer sits neatly on either side – Brookfield has the balance sheet depth to fund a project like Western Renewables Link without blinking, but a privately held monopoly network is also harder for the public to watch in real time than a listed one filing quarterly reports.
Western Renewables Link: the backbone to the west #
The project under construction out past Bacchus Marsh is a roughly 190-kilometre, 500kV double-circuit transmission line connecting the Western Victoria Renewable Energy Zone, around Ararat and Horsham, through to the grid near Melbourne at Sydenham. It’s designed to move the output of wind and solar farms that have been built, and are still being built, across western Victoria into the load centre where the demand actually sits.
This is the kind of project our transmission versus distribution piece gets at – AusNet’s transmission licence covers exactly this sort of long-haul, high-voltage backbone, distinct from the poles-and-wires job of getting power the last few kilometres to a house. Western Renewables Link sits in AEMO’s Integrated System Plan as one of the actionable projects needed to unlock the Western Victoria REZ, and it’s been through the sort of route controversy that seems to attach to every major transmission build in this country at the moment: landholder objections over easement routes, concerns about visual impact near townships like Bungaree, and a construction timeline that’s slipped from the original targets. AEMO’s 2024 Integrated System Plan still lists it as a priority build, which tells you the market operator hasn’t lost confidence in the need for the line even as the construction schedule has stretched.
Let’s be careful with the capacity figures here, because transmission lines get described loosely in public commentary. The project is rated to carry around 2,500MW of transfer capacity at full build, which is power, not energy. It says nothing about how many hours a day that capacity will actually be used, which depends on how much wind and solar capacity actually gets built and connected behind it in the Western Victoria REZ. A transmission line is a enabler, not a generator; its value shows up in avoided curtailment and new connections, which is harder to put a single number on than a megawatt rating.
The distribution side nobody talks about #
Transmission gets the headlines because it’s visible. You can see the towers from the highway. AusNet’s distribution network is quieter but arguably more consequential for the average Victorian household, because it’s the network dealing with the rooftop solar influx described in our piece on whether rooftop solar is quietly breaking the grid. AusNet’s distribution area takes in parts of Melbourne’s eastern and north-eastern suburbs along with the Latrobe Valley, which puts it in an unusual position: it’s simultaneously managing the tail end of coal country, where Yallourn is counting down to its scheduled 2028 closure, and some of Melbourne’s fastest-growing rooftop solar postcodes.
Managing that combination means AusNet has to invest in network augmentation to handle two-way power flows – exports from household solar pushing back up the line at midday – at the same time as it’s planning for load growth from new housing estates on Melbourne’s fringe. The AER’s distribution determination for AusNet runs through a regulatory period that sets allowed revenue based on forecast capital and operating expenditure, reviewed and published on the AER’s website – it’s not exciting reading, but it’s where the actual numbers on network tariffs and investment allowances live, rather than in any company press release.
Where AusNet sits against the rest of the Latrobe Valley transition #
I’d put AusNet in a different category to the gentailers we usually write about. It doesn’t generate, it doesn’t retail, and it has no exposure to wholesale price volatility the way AGL or Origin does. That’s a genuinely different risk profile, closer to the one Powerlink carries in Queensland with its CopperString transmission bet than to anything in AGL versus Origin’s gentailer playbook. The revenue is regulated, the returns are set by formula, and the main commercial risk is cost overrun on construction projects relative to what the AER has allowed for in the regulatory determination.
That’s precisely why Western Renewables Link matters so much to how this company is judged over the next five years. If it comes in substantially over the AER-allowed capital expenditure, or well behind schedule, that’s a real credibility question for a business whose entire pitch to its regulator and to the public is that it can deliver nation-building transmission reliably. If it lands close to budget and on a workable revised timeline, it becomes the template other state-based transmission builds point to when they’re trying to explain why these projects take the better part of a decade from announcement to energisation.
A quiet aside on long projects #
I spend a fair bit of time on long bike rides out through exactly this country: the Western Highway corridor towards Ballarat and beyond, and you get a strange feel for infrastructure time scales doing it slowly rather than at highway speed. The towers go up section by section over months, the same paddock looks different every few rides, and it reminds you that a 190-kilometre transmission line isn’t built the way a wind farm is, in a single concentrated construction season. It’s built in a long chain of individual easement agreements, environmental approvals and procurement contracts, each one capable of adding months if something goes wrong. That’s not a criticism of AusNet specifically. It’s just the mechanical reality of how transmission gets built in this country, and it’s worth remembering next time a headline treats a multi-year build as if the delay were unusual.
What the Brookfield era has actually changed #
The clearest answer is capital access. Brookfield’s infrastructure funds operate at a scale where a multi-billion-dollar transmission project doesn’t need to compete internally against other capital priorities the way it might inside a smaller listed company juggling dividend expectations. That’s the case made for private ownership of exactly this kind of asset, and it’s broadly consistent with the pattern explored in our look at public versus private ownership of generation – private capital tends to move fast when the regulatory return is secure and the project pipeline is clear, which transmission build-out in Victoria largely is.
What hasn’t changed is the regulatory leash. Every dollar AusNet spends on augmentation, maintenance or new connections eventually has to be justified to the AER in a revenue determination, and that process is public, submission-based, and slower than anyone running a construction schedule would like. Privatisation shifted who owns AusNet’s equity. It didn’t touch who sets AusNet’s allowed revenue, and that distinction gets lost in a lot of commentary about private utility ownership that treats “privately owned” as synonymous with “unregulated.” It isn’t, not for a monopoly transmission and distribution business in the NEM.
The line to watch #
Western Renewables Link’s revised energisation timeline, and whether it slips again, is the single clearest marker of how this company is performing against its own stated mandate. Everything else – the distribution network humming along in the background, the gas network winding down slowly as electrification spreads – is steadier and less newsworthy. But the transmission build is the one piece of AusNet’s portfolio that actually determines how much wind and solar capacity in western Victoria gets to do useful work rather than sit curtailed behind a bottleneck, and that’s worth more scrutiny than a project with “renewables” in its name usually gets in this market.
– Anjali Rao, Grid & Storage Correspondent