Upgrading the Queensland-NSW Interconnector (QNI) will boost interstate transmission capacity and increase power flow on existing lines. This will make it easier and more efficient to share lower-cost generation between the two states, and help to reduce electricity bills for customers.
QNI will also help to support the development of renewable generation in new energy zones.
The project has been identified as a priority by both the Australian Energy Market Operator in the 2020 Integrated System Plan and by the State Government in the NSW Transmission Infrastructure Strategy.
The Integrated System Plan stated the upgrade is critical to address cost, security and reliability issues.
The Commonwealth and New South Wales Governments supported the early delivery of QNI through a $102 million joint-underwriting of the project.
What does the project involve?
The project involves upgrading transmission lines between Liddell power station, Muswellbrook and Tamworth substations. Activities 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.
We are also upgrading substations at Tamworth, Dumaresq, Armidale and Muswellbrook. Activities include replacing conductors and other equipment to ensure the quality and reliability of electricity supply.