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Powerlink has published a Project Specification Consultation Report (PSCR) to address the secondary system condition risks at Sumner Substation.
Sumner Substation was established in 2006 as a 110 kilovolt (kV) switching station to meet the increasing demand in the western suburbs of Brisbane. Planning studies have confirmed there is a long-term requirement to continue to supply the existing electricity services provided by Sumner Substation.
The secondary systems at Sumner broadly perform the functions of transmission element protection, data collection, remote (and local) control and monitoring. The majority of Sumner’s secondary systems will reach the end of their technical service lives by June 2026, with only limited manufacturer support and spares available after this time. Over 80% of the 110kV secondary systems equipment is expected to reach an unsupportable level by June 2026.
The PSCR identifies in-panel replacement of selected 110kV secondary systems equipment by December 2025 as the preferred solution to address risks at Sumner Substation. The indicative capital cost of the RIT-T project for the preferred option is $8.1 million in 2023/24 prices.
Powerlink welcomes submissions from potential proponents who consider they may be able to offer a credible non-network option that is both economically and technically feasible to address the risks identified in the PSCR.
Submissions are due by close of business Friday, 17 May 2024.
Powerlink anticipates publication of a Project Assessment Conclusions Report, containing final results of the economic assessment of credible options, in June 2024.
In the context of engagement activities with customers and the general community, Powerlink has assessed this RIT-T project as ‘minor’ on the RIT-T stakeholder engagement matrix.
A copy of the PSCR is available below.