The progressive displacement of traditional generation in Central Queensland with increasing amounts of large scale renewable generation in the North, coupled with a reduction in minimum daytime demand due to the uptake of small scale rooftop PV systems, has led to an increase in the reactive charging of 275kV lines in the Central Queensland area. This has resulted in a growing potential for sustained over-voltage events.
The Rules specify allowable over-voltage limits and require Powerlink to take action to ensure these limits are not exceeded in order to maintain the power system in a secure state.
The proposed preferred option that is considered to satisfy the Regulatory Investment Test for Transmission (RIT-T) involves the installation of a 150MVar 300kV bus reactor at Broadsound Substation by June 2023 to address the identified need.
The indicative capital cost of the RIT T project for the preferred option is $9.63 million in 2020/21 prices.
Powerlink welcomes submissions from potential proponents who consider they may be able to offer a credible non-network option that is both economically and technically feasible to address the voltage control risks identified in the PSCR.
Submissions are due by COB Friday 8 January 2021.
Powerlink anticipates the publication of a Project Assessment Conclusions Report in May 2021 containing the final results of the economic assessment.
In the context of engagement activities with consumers and the general community, Powerlink has assessed this project as 'minor' on the RIT-T stakeholder engagement matrix.
A copy of the Project Specification Consultation Report is available below.