Powerlink is responsible for ensuring a secure and reliable network. System strength is essential for a stable and secure power system — especially as Queensland transitions to higher levels of inverter‑based generation.
As Queensland’s System Strength Service Provider, Powerlink must ensure enough system strength is available across key parts of the network as forecast by the Australian Energy Market Operator (AEMO).
To meet these requirements, Powerlink is progressing contracts with non-network providers and progressing Contingent Project Applications (CPA) for investments in synchronous condensers, a technology that provides system strength.
The CPAs follow on from Powerlink completing a system strength Regulatory Investment Test for Transmission (RIT-T), which confirmed that a portfolio of solutions centred on synchronous condensers was the most cost-effective approach in the short to medium term.
Powerlink’s CPAs will be lodged with the Australian Energy Regulator (AER) for assessment. In turn, approved investments will be included in Powerlink’s regulated revenue and the investments completed to address system strength requirements.
What is system strength?
System strength is a measure of the stability of a power system under all reasonably possible operating conditions. It describes a system’s overall performance and its ability to recover quickly from sudden events. System strength is location specific and essential to ensure voltage remains within limits, preventing damage to infrastructure and loss of supply.
What are synchronous condensers?
Synchronous condensers (also referred to as ‘SynCons’) are rotating electrical machines that help keep the power system stable by supporting voltage and providing system strength. They do this by balancing the fluctuations of the electricity flow (AC voltage).
The primary role of a synchronous condenser is not to generate electricity but act as a ‘shock absorber’ to maintain stable voltage levels and improve grid stability. They play a similar role as a pressure regulating tank in a water system – acting to regulate water pressure and flow in response to changes in demand or disturbances in the water system.
What are contingent project applications?
Contingent projects provide a structured, transparent pathway for progressing significant investments when the need for them is triggered. This mechanism ensures customers do not pay for large projects earlier than necessary, while still enabling delivery once clear evidence supports the need for them.
Next Steps
In 2026, Powerlink is preparing to lodge its first System Strength Contingent Project Application, targeting submission following completion of key pre-lodgement requirements. The CPA will be published on the AER website once accepted as compliant, and stakeholders will have 30 calendar days to provide feedback.
Updates will be added to this page as timelines and consultation dates are confirmed.