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 widened 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 applying the RIT-T to the projects listed in the table below.

Project
Status
Type
Current Report
Consultation closing date
Reinforcing the New South Wales Southern Shared Network to increase transfer capacity to the state’s demand centresConsultation OpenIntraregional Capacity Transfer Project Specification Consultation Report17 September 2019
Maintaining compliance with performance standards applicable to Wagga330kV substation secondary systemConsultation OpenSecondary Systems Project Specification Consultation Report5 September 2019
Maintaining compliance with performance standards applicable to Deniliquin substation secondary system
Consultation OpenSecondary Systems Project Specification Consultation Report5 September 2019
Maintaining a reliable Static Var Compensator at Lismore
Consultation Open
SVC
Project Specification Consultation Report
26 August 2019
Maintaining compliance with performance standards applicable to Haymarket substation secondary systems
Consultation Open
Secondary Systems
Project Specification Consultation Report
26 August 2019
Managing Sydney East substation's asset risksRIT-T Complete
Substation Project Assessment Conclusions Report

Project Specification Consultation Report
Closed
Maintaining a reliable Upper Tumut substation
PSCR Closed
Substation
Project Specification Consultation Report
Closed
Managing safety and environmental risks from corrosion on Line 959_92Z
Consultation Open
Transmission line
Project Assessment Conclusions Report

Project Specification Consultation Report
19 September 2019


Closed

Managing the South Sydney Substation's Asset Risks

PSCR Closed

Substation

Project Specification Consultation Report

Closed


Managing the Risk of Corrosion between Vineyard and Munmorah on Line 25 & 26

PSCR Closed

Transmission line

Project Specification Consultation Report

Closed

Managing the Risk of Corrosion on Line 8
RIT-T Complete
Transmission line
Project Assessment Conclusions Report

Project Specification 
Consultation Report

Closed


Closed
Managing the Risk of Corrosion between Vales Point and Sydney North on Line 22
RIT-T Complete
Transmission line
Project Assessment Conclusions Report

Project Specification 
Consultation Report

Closed


Closed

Victoria to NSW Interconnector Capacity Upgrade Project

PSCR Closed

Interconnector

Project Specification Consultation Report

Closed

Expanding NSW-QLD Transmission Transfer Capacity

PSCR Closed
Interconnector Project Specification Consultation Report Closed

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