Transgrid has published the Project Specification Consultation Report (PSCR) for Maintaining safe and reliable operation of Inverell substation. Publication of this PSCR represents the first step in the Regulatory Test for Transmission (RIT-T) process.
Inverell 132/66 kV substation is located in Transgrid’s Northern NSW network. It connects to Transgrid’s 132 kV Moree, White Rock and Armidale substations. It also connects to Essential Energy’s 66 kV distribution network which supplies industrial and residential loads in the Inverell region.
The condition of the No.1 and No.2 transformers are approaching the end of their serviceable life and showing signs of deterioration. These condition issues, if not remediated, increase the probability of transformer failure, which could result in reliability, safety, environment and financial consequences.
We have classified this RIT-T as a ‘market benefits’ driven RIT-T as the economic assessment is not being progressed specifically to meet a mandated reliability standard but by the net benefits that are expected to be generated for end-customers.
In the PSCR Transgrid presents two credible network options that would meet the identified need from a technical, commercial, and project delivery perspective. This PSCR finds that implementation of Option 1 is the preferred option at this draft stage of the RIT-T process. Option 1 involves the replacement of the No.1 and No.2 transformers at Inverell substation.
The estimated capital cost of this option is approximately $15.50 million ($2024-25) +/- 25 per cent. Transgrid is the proponent of the proposed network project.
Transgrid welcomes written submissions on materials contained in this PSCR. Submissions are due on 23 June 2025.
In accordance with the requirements of the Rules, a summary of the Project Specification Consultation Report is made available on the AEMO website. A copy of the PSCR can be obtained from Transgrid’s website or by emailing regulatory.consultation@transgrid.com.au.