Regulatory Investment Tests

TransGrid is required to undertake the Regulatory Investment Test for Transmission (RIT-T) for regulated revenue investments. 

From 18 September 2017, changes to the National Electricity Rules widen the scope of the RIT-T to include replacement projects. 

The purpose of the RIT-T, as set out at clause 5.16 of the National Electricity Rules, is to identify the credible option that maximises the present value of net economic benefit to all those who produce, consume and transport electricity in the market.

TransGrid is conducting the RIT-T on the projects listed in the table below.

Project
Status
Type
Current Report
Consultation closing date

Managing the Risk of Corrosion between Vales Point and Sydney North on Line 22


Consultation open

Transmission line

Project Specification Consultation Report

29 November 2018


Managing the South Sydney Substation's Asset Risks

Consultation open

Substation

Project Specification Consultation Report

4 December 2018


Managing the Risk of Corrosion between Marulan and Dapto on Line 8

Consultation open

Transmission line

Project Specification Consultation Report

12 December 2018

Submissions are welcome on the current RIT-T projects by the applicable consultation closing date.


TransGrid has a small number of projects that were committed during the transitional period, 18 September 2017 to 30 January 2018. These projects are excluded from the RIT-T process and are listed in the table below.


Project
Project description
Scheduled completion date
Lower Tumut Secondary Systems Renewal

Replacement of secondary systems equipment at Lower Tumut
June 2020
SCADA-EMS Replacement
Replacement and commissioning of the new SCADA between TransGrid sites and AEMO, as well as third parties
July 2020