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Regulatory Investment Test (RIT)

 

 

The Regulatory Investment Test (RIT) is a cost benefit analysis overseen by the Australian Energy Regulator (AER). It assesses the economic and technical impact of major network investments in the national energy market above $6 million. The RIT process ensures regulated transmission and distribution investment decisions are in the long term interests of customers.

Defined in clauses 5.15 to 5.17 of the National Electricity Rules, the purpose of a RIT is to identify credible options to maximises the present value of net economic benefit to all those who produce, consume and transport electricity in the national electricity market.

Generally, there are three broad stages AusNet Services follows if a RIT is required for investment*.


Current Regulatory Investment Test Projects

 AusNet Services is applying the RIT to the following projects listed below.

 

Regulatory Investment Test for Transmission

Identified Need 

Location 

Report 

Consultation Closes 

Status 

Maintain Supply Reliability
Shepparton Terminal Station
Project Specification Consultation Report
18 March 2021
Open
Maintain Supply Reliability
Sydenham Terminal Station
Project Specification Consultation Report
15 March 2021
Open

Maintain supply reliability

Brooklyn Terminal Station  

Project Specification Consultation Report

15 February 2021 

Open


Maintain Supply Reliability


East Rowville Terminal Station

Project Assessment Conclusions Report

Project Assessment Draft Report

Project Specification Consultation Report

18 Dec 2020

20 Oct 2020

24 Mar 2020

Open

Closed

Closed

Maintain Supply Reliability

Templestowe Terminal Station

Project Assessment Conclusions Report

Project Assessment Draft Report

Project Specification Consultation Report

18 Dec 2020
26 Oct 2020
24 Mar 2020

Open
Closed
Closed

Maintain Supply Reliability

Cranbourne Terminal Station

Project Specification Consultation Report

25 Sep 2020

Closed

Corrective Action Reliability

Horsham Terminal Station

Project Specification Consultation Report

3 Sep 2020

Closed


 

Regulatory Investment Test for Distribution

 Identified Need Location
Report
Consultation Closes  Status 
 Avoid risk of unserved energy East Gippsland
Non-network Options Report
18 Dec 2020
Open 

 To access historical reports for closed projects please contact AusNet Services via rittconsultations@ausnetservices.com.au.


Consultations

To get involved in RIT projects, please contact AusNet Services via rittconsultations@ausnetservices.com.au

Further information is also available in the Energy Networks Australia RIT-T handbook.


Projects Exempt from RIT

The following distribution projects have met the criteria of being committed, and will therefore be exempt from the requirement to carry out a Regulatory Investment Test:


Project Name

Location

Scope of Work Summary

Target Completion

(year end)

Morwell Zone Substation (MWL)

Morwell Terminal Station (MWTS), Morwell Terminal Station 22kVswitchyard (MWT), Morwell East Zone Substation (MWE) and Morwell Power Station (MPS)

Decommission Morwell Terminal Station 22 kV switchyard (MWT).

Design, procure, construct, install and commission:

- two new 20/33 MVA 66/22kV transformers at a new Morwell Zone Substation (MWL).

- three indoor 22kV modular switchboards at MWL.

- two new 22/6.6kV transformers at MWE.

- two new outdoor 22kV circuit breakers at MWE.

- associated primary and secondary equipment at MWL and MWE, and to facilitate direct connection of MWL to MWTS 66kV to allow MPS decommissioning.

2019

SMR Zone Substation Rebuild

Seymour Zone Substation (SMR)

Decommission deteriorated 66kV circuit breakers and three 66/22kV transformers.

Design, procure, construct, install and commission:

- four new 66kV circuit breakers and a new 66kV ring bus.

- two new 20/33 MVA 66/22kV transformers.

- New Neutral Earthing Resistor.

- Relocation of the existing 22kV circuit breaker.

2020

Wonthaggi ZSS Rebuild

Wonthaggi Zone Substation (WGI)

At WGI, design, procure, construct, install and commission:

- Two indoor 22kV modular switchboards.

- Two 66kV circuit breakers.

- Three 6 MVAr 22kV capacitor banks.

- New Neutral Earthing Resistor.

- Associated primary and secondary equipment.

2018

MYT Zone Substation Rebuild

Myrtleford Zone Substation (MYT)

Decommission deteriorated 66kV and 22kV switchgear.

Design, procure, construct, install and commission:

- five new 66kV circuit breakers and a new 66kV ring bus.

- two new 22kV indoor switchboards.

- Associated primary and secondary equipment.

2019

PHM ZSS Rebuild and Full Switching

Pakenham Zone Substation (PHM)

Decommission the three deteriorated 10/13.5MVA 66/22kV transformers and the 66kV and 22kV switchgear.

Design, procure, construct, install and commission:

- two new 20/33MVA 66/22kV transformers.

- five new 66kV circuit breakers and a new 66kV ring bus.

- two new 22kV switchboards.

- new Neutral Earthing Resistor

- new 3x4MVAr capacitor bank

- Associated secondary equipment.

2017

KLK ZSS Rebuild

Kinglake Zone Substation (KLK)

Decommission deteriorated 66/22kV transformers and 66kV switchgear.

Design, procure, construct, install and commission:

- two new 66/22kV transformers.

- one new 66kV circuit breaker.

- four new 66kV disconnector switches.

- Associated secondary equipment.

2019

BDL ZSS Rebuild Stage 1

Bairnsdale Zone Substation (BDL)

Decommission six deteriorated 66kV circuit breakers.

Design, procure, construct, install and commission:

- one new 20/33 MVA 66/22kV transformer.

- six new 66kV circuit breakers.

2017

MBY ZSS Rebuild Stage 2

Mount Beauty Zone Substation (MBY)

Decommission deteriorated 66/22kV transformers and 66 kV regulator and station service transformer.

Design, procure, construct, install and commission:

- two new 10/15 MVA 66/22kV transformers.

- New Neutral Earthing Resistor.

- New station service transformer.

- Associated secondary equipment.

2017