Overview
Major secondary system replacement works are underway at Powerlink’s Tangkam and Oakey substations, located about two hours west of Brisbane. Secondary systems are the complex network of equipment and circuits used to monitor, control and protect high voltage primary equipment. These upgrades are essential as existing equipment reaches the end of its technical service life.
Status
Civil works commenced in August 2025 and will continue through to the end of the year. This includes earthworks, foundation construction, cable installation, and extensions to trenching and drainage systems.
New control buildings are now on-site progressing with site integration.
Following installation, the sites will undergo site acceptance testing, which is a rigorous process to confirm that all systems and equipment meet quality standards, operate safely and are fully functional. Commissioning is scheduled for late 2027.