Funding approval process
To be given final investment approval, Transgrid must show that the preferred option for improving stability in south-western NSW will deliver the greatest net benefits to energy consumers. The net benefits delivered by the project are assessed using the Regulatory Investment Test for Transmission (RIT-T) administered by the Australian Energy Regulator (AER).
The RIT-T assesses network and non-network solution options from a technical and economic perspective by:
- Informing stakeholders of the investment need and proposed options to address this need
- Testing the market for alternative and more efficient solutions
- Explaining to stakeholders the basis on which the preferred option has been selected.
We have now completed the final stage of the RIT-T and after assessing multiple options, identified that a new Darlington Point to Dinawan 330 kV transmission line coupled with an interim 3-year network support contract with a battery energy storage system (BESS) solution is the preferred solution.
RIT-T process and submissions
Project Specification Consultation Report
Project Assessment Draft Report
Comments from the submissions received in response to the PSCR were considered when preparing the Project Assessment Draft Report (PADR), published in September 2021. The PADR includes a full quantitative analysis of the proposed options and expected net market benefit across a range of scenarios and sensitivities. We have published the following supporting documents:
PADR supporting documents
We invited written submissions on the material contained in the PADR. We received submissions from six parties in response to the PADR, one of which is confidential. Submissions approved for publication are from:
- Darlington Point Solar Farm
- Iberdrola Australia
- Public Interest Advocacy Centre
- Reach Solar Energy
- RWE Renewables
We engaged further with parties to confirm the status and technical feasibility of the options, which involved the provision of further information from these parties.
Thank you to those who made a submission throughout the RIT-T process.
PADR supporting documents
Project Assessment Conclusions Report
In June 2022, we have published the Project Assessment Conclusions Report (PACR) for Improving Stability in South Western NSW.
The PACR has been prepared as the final step in the Regulatory Investment Test for Transmission (RIT-T) process and follows the Project Assessment Draft Report (PADR) published in September 2021.
The assessment in this PACR finds that a new Darlington Point to Dinawan 330 kV transmission line coupled with an interim 3-year network support contract with a battery energy storage system (BESS) solution (‘Option 4’) is the preferred option for meeting the identified need across all scenarios and sensitivities assessed.
PACR Supporting Documents
If you have any questions about the project, please contact email@example.com or phone 1800 222 537.