ElectraNet has published the Project Specification Consultation Report (PSCR) for the Lower South East upgrade, highlighting the need to augment several substations to increase capacity on the network while supporting growth in the region.
This PSCR relates to the identified need to maintain sufficient transformation capacity in the Lower South East supply area.
The need is driven by forecast demand at the Blanche connection point and associated obligations under the Electricity Transmission Code (ETC). SA Power Networks has advised updated demand forecasts in December 2025. Based on adding these to current forecasts, there is an overload of the transformers at Blanche as early as 2029.
There is considered to be a single technically and economically credible option: Transfer approximately 13 MVA of SAPN load from Blanche to Mount Gambier substation (SAPN switching), and augment Mount Gambier by replacing the existing 25 MVA 132/33 kV transformer (TF2) with a 60 MVA transformer, alongside associated refurbishment / replacement works at Mount Gambier.
ElectraNet welcomes written submissions on this PSCR. Submissions are due on or before Tuesday, 30 June 2026. Submissions should be emailed to [email protected].
Submissions will be published on the ElectraNet website. If you do not want your submission to be published, please clearly specify this at the time.