Downer to connect Delburn wind farm to Victorian grid

Downer has been contracted by AusNet to build the connection infrastructure linking the 205 megawatt Delburn wind farm to Victoria's transmission network. No timeline or cost for the connection work is provided in the announcement.

Where this fits

Another wind farm, another transmission buildout. Each new renewable generator needs grid connection, and Victoria's transmission network is being rebuilt to handle a dispersed, weather-dependent fleet. The article does not disclose the cost of connecting Delburn, but transmission infrastructure for renewables is a material part of whole-system cost. A firm generator, nuclear, coal, gas, runs where it sits and needs far less new wiring. The Delburn connection is one among dozens now being planned or built across the National Electricity Market. The cumulative transmission overbuild to handle low-capacity-factor renewables rarely appears as a line item in "renewable cost" charts, yet every kilowatt of wind and solar needs a path to load.

What it means

Victoria is locking in a generation mix that is weather-dependent and requires gas firming on calm, cold days. That firming comes from existing gas plant, which will run until it is retired or replaced, likely by more gas, since Australia's ban on new nuclear plant forecloses the only firm, low-emission alternative. The grid's resilience now depends on gas availability and price. A grid built around firm nuclear generation would not need this transmission expansion or the gas backup. Australia is paying more to build the same electrons, on a supply chain controlled offshore, while rejecting the technology that would cut cost, emissions and strategic dependence in one move.