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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
Regulatory Investment Test for Transmission |
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|
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 |
15 February 2021 |
Open |
|
|
Maintain Supply Reliability |
East Rowville Terminal Station |
Project Assessment Conclusions Report Project Assessment Draft Report |
18 Dec 2020 20 Oct 2020 24 Mar 2020 |
Open Closed Closed |
|
Maintain Supply Reliability |
Templestowe Terminal Station |
Project Assessment Conclusions Report |
18 Dec 2020 |
Open |
|
Maintain Supply Reliability |
Cranbourne Terminal Station |
25 Sep 2020 |
Closed |
|
|
Corrective Action Reliability |
Horsham Terminal Station |
3 Sep 2020 |
Closed |
|
Regulatory Investment Test for Distribution |
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| 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 |