QNI (Queensland NSW Interconnector upgrade)

QNI (Queensland NSW Interconnector upgrade)

Why do we need an upgrade?

Upgrading the Queensland NSW Interconnector (QNI) will boost interstate transmission capacity and increase power flow on existing transmission lines. This will make it easier and more efficient to share power generation and resources amongst the National Energy Market. 

The project has been identified as a priority by both the Australian Energy Market Operator in the 2018 Integrated System Plan and by the State Government in the NSW Transmission Infrastructure Strategy

Download the QNI Upgrade factsheet here.

View the latest media release from TransGrid here


What does the project involve?

Work to upgrade transmission lines will take place along existing lines between Liddell power station, Muswellbrook and Tamworth substations. Activities may include: 
  • Replacement of pole structures
  • Removal of existing pole structures
  • Installation of new mid-span structures
  • Strengthening pole structures
  • Replacement or rearrangement of transmission line insulators.
As part of the QNI Upgrade, TransGrid will also upgrade substations at Tamworth, Dumaresq, Armidale and Muswellbrook. Activities will include replacing conductors and other equipment to ensure the quality and reliability of electricity supply.

Key dates

Q4 2018

RIT-T Project Specification Consultation Report (PSCR) published - The PSCR detailed the need to increase the existing Queensland to New South Wales interconnector capacity and described the credible options to meet the need, including technical characteristics.

Q3 2019
RIT-T Project Assessment Draft Report (PADR) published - The PADR outlined how we addressed the issues raised in submissions to the PSCR and explained the basis on which the preferred option at the draft stage was selected. 
Q2 2019
Preliminary investigations and project scoping.
Q4 2019 
RIT-T Project Assessment Conclusions Report (PACR) published - The PACR addresses PADR consultation responses and determines the final preferred option.
Announcement of  joint-underwriting of up to $102 million to support the construction upgrade of the NSW–Queensland Interconnector (QNI) by TransGrid.

Detailed design and site investigations.
Q1 2020
Australian Energy Regulator (AER) RIT T determination (March 2020)

Regulator approval of Contingent Project Application (CPA) (April 2020)
Construction commences. (May 2020)
Q4 2021
Project commissioned.