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
TransGrid PSCR - Maintaining compliance with performance standards applicable to Wagga330kV substation secondary systemConsultation OpenSecondary SystemsProject Specification Consultation Report5 September 2019
TransGrid PSCR - Maintaining compliance with performance standards applicable to Deniliquin substation SSConsultation OpenSecondary SystemsProject Specification Consultation Report5 September 2019
TransGrid PSCR - Maintaining a reliable Static Var Compensator at Lismore
Consultation Open
SVC
Project Specification Consultation Report
26 August 2019
TransGrid PSCR - Maintaining compliance with performance standards applicable to Haymarket substation secondary systems
Consultation Open
Secondary Systems
Project Specification Consultation Report
26 August 2019
TransGrid PACR - Managing Sydney East substation's asset risksOpen for DisputeSubstationProject Assessment Conclusions Report13 July 2019
TransGrid PSCR - Maintaining a reliable Upper Tumut substation
Consultation Open
Substation
Project Specification Consultation Report
25 June 2019
TransGrid PSCR - Managing safety and environmental risks from corrosion on Line 959_92Z
Consultation Open
Transmission line
Project Specification Consultation Report
25 June 2019
TransGrid PACR - Managing the Risk of Corrosion on Line 8
Open for Dispute
Transmission line
Project Assessment Conclusions Report
5 April 2019

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

Open for dispute

Transmission line

Project Assessment Conclusions Report

25 March 2019


Managing the South Sydney Substation's Asset Risks

PSCR Closed

Substation

Project Specification Consultation Report

Closed


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

PSCR Closed

Transmission line

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

Victoria to NSW Interconnector Capacity Upgrade Project

PSCR Closed

Interconnector

Project Specification Consultation Report

Closed

Expanding NSW-QLD Transmission Transfer Capacity

Consultation Open

Interconnector

Project Specification Consultation Report

22 February 2019

Managing Sydney East substation’s asset risks

Consultation open
Substation Project Specification Consultation Report 15 March 2019

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