SA-Vic Interconnection Upgrade

Purpose

This proposed project targets an increase to the capacity of the existing 275 kV Heywood Interconnector to allow increased power flows between South Australia and Victoria, and thereby address congestion, high market price events and restrictions on wind farm outputs.

RegionSouth East
Development DescriptionSubstation and Transmission Line
Program Summary

This project will resolve existing transmission network congestion.  Two transmission options are proposed, including:

  • an incremental upgrade to increase existing interconnector capacity from 460 MW to 650 MW, providing up to 190 MW of additional capacity;  and
  • a new 500 kV transmission line from the Victorian Heywood terminal substation into the South Australian South East region, providing up to 2000 MW of additional capacity.
Development StatusUnder Consideration
Additional Information

This project builds on the South Australian Interconnector Feasibility Study published in February 2011 and the 2010 National Transmission Network Development Plan indicating the possibility of net market benefits from increasing the capacity of the existing 275 kV interconnector between South Australia and Victoria.