Comparing High Voltage Overhead and Underground Transmission Infrastructure (up to 500kV)

Research Background

Based on the experience of transmission network service providers (TNSP) in other states Powerlink Queensland commissioned this collaborative research project between Curtin University and the University of Queensland.  The aim of which was to provide the latest independent scientific information to inform a clear and consistent approach to the consideration of undergrounding of transmission infrastructure and the associated trade-offs.

While transmission line projects are very technical in nature, it is impossible to ignore their impacts on the local environment, individual stakeholders and the wider communities they are being proposed for.  The importance of which was highlighted by the Australian Energy Infrastructure Commissioner (AEIC) in his submission to the Australian Energy Market Commission – Transmission Planning and Investment Review (16th August, 2022). The Commissioner highlighted:

The timely approval and efficient delivery of large-scale transmission projects that enable the significant energy transition in Australia to occur, whilst ensuring that potential impacts of such projects to regional communities and landholders are appropriately managed, is likely to be our collective highest priority for this decade.

Recognising that no two situations will be the same, this research combines the latest technical knowledge with a review of environmental, social and economic considerations. It systematic approach provides a credible baseline from which to engage key stakeholder groups for input into the trade-offs associated with the choices surrounding transmission line infrastructure deployment.