ACCIONA wins major power transmission project to decarbonize Western Australia - ACCIONA | Australia

Spanish engineering firm ACCIONA has been awarded a major contract to build power transmission infrastructure in Western Australia as part of the state's renewable energy transition. The project is designed to connect new renewable generation capacity to population centres and integrate it into the grid. No specific cost, timeline, or capacity figures are provided in the announcement.

Where this fits

This is a transmission overbuild story. A renewables-heavy grid requires far more transmission wire than a firm baseload system because wind and solar output is weather-dependent and geographically scattered; the grid must carry power from wherever the sun shines or wind blows on any given day, not from a concentrated firm source. Transmission is expensive, long-lead, and often subject to planning delays. It is also part of the hidden whole-system cost of renewables that does not appear in the per-megawatt-hour headline figures. ACCIONA is a major contractor, but the article does not disclose the cost to the Western Australian consumer or taxpayer, nor the timeline to completion, both material facts for assessing the true delivered cost of decarbonization via this path.

What it means

Australia is locking in a transmission-heavy, weather-dependent grid architecture. The alternative, firm, energy-dense nuclear generation at a handful of large, stable sites, would need far less transmission overbuild and could be built under the same supply-chain and planning pressures, yet is prohibited by law. Australia is paying the transmission premium for renewables without the option to pay the baseload premium for the lowest-emission firm power available.