Network projects

ActewAGL Distribution is constantly planning for the future and securing the ACT and region's energy supplies. ActewAGL Distribution also engages Jemena to perform natural gas network functions through the Distribution Assets Management Services agreement.

Civic zone substation extension

ActewAGL has completed major capital works to increase the capacity of its distribution network supplying central Canberra.

The project involved the expansion of the Civic zone substation building and switchyard and consisted of four major works.

  • Installation of the third 132kV/11kV 55MVA transformer and 13 panel 11kV switchboard
  • Replacement of two aging 13 panel 11kV switchboards
  • Asset renewal of various 132kV switchyard equipment and the replacement and upgrade of existing control, protection and monitoring schemes on site
  • Provision of a new disaster recovery facility

Construction work was being undertaken by Jemena and the project was completed in 2013.

 Civic Zone TX   Civic Zone delivery
132kV/11kV 55MVA transformer being installed on site

Civic zone building extension   Civic zone 132kv switchyard for the new cable duct system
Construction work on the building extension and excavation works (within the 132kV switchyard) for the new cable duct system

Molonglo zone substation

At ActewAGL, we understand the ongoing energy needs of the community. That’s why we intend to construct a new 132/11kV zone substation in Molonglo, so we’re ready to meet the electricity needs of the Molonglo Valley, in the future.

The substation will provide an additional 55MVA capacity, enough to supply more than 20,000 homes with electricity.

Molonglo Stage 1 - land acquisition and development application (DA) approval is underway, with completion of the Stage 1 construction in the next 4 to 5 years.

New East Lake zone substation

ActewAGL has completed construction of a new 132/11kV zone substation to increase the capacity of its distribution network supplying the South Canberra region. In particular, this is to meet the existing and growing demand in Fyshwick, Canberra Airport precinct and South Canberra.

The East Lake zone substation development will be undertaken in two stages. Stage 1 was completed in early 2014.

  • Stage 1 involved the construction of a new zone substation and undergrounding of high voltage transmission lines to Bruce and City East.
  • Stage 2 involves removal of the causeway switching station, undergrounding high voltage transmission cables to Telopea and Gilmore zone substation. Planning and evaluation has begun for this stage of the project.

132 11kV power transformer installation and cabling completed  11kV switchgear  installation and  pre -commissioning completed
132 11kV power transformer installation and cabling completed                     11kV switchgear  installation and  pre -commissioning completed

132KV Gas Insulated Switchgear installation.
132KV Gas Insulated Switchgear installation

Second electricity supply for the ACT

The second point of electricity supply into the ACT will supplement the existing major electricity supply point in northern Canberra and is an important part of ensuring a reliable and secure electricity supply to the ACT.

The first stage of the second point of supply to the ACT project involved the construction by TransGrid in 2013 of the 330/132 kV Williamsdale Substation in the south of the ACT. This substation has been connected to ActewAGL's network via two new 132 kV transmission lines to ActewAGL's Theodore and Gilmore substations.

To complete the second point of supply to the ACT project, the following works are proposed and will be completed by 2020.

  • Construction of a new 330/132 kV substation by TransGrid at Stockdill Drive, West Belconnen.
  • Construction by TransGrid of a new 330 kV transmission line from Stockdill Substation to Canberra Substation.
  • Reconnection by TransGrid of its 330 kV Upper Tumut - Canberra transmission line to Upper Tumut - Stockdill.
  • Reconnection by TransGrid of its 330 kV Canberra - Williamsdale transmission line to Stockdill - Williamsdale.
  • Construction by ActewAGL of a new 132 kV transmission line from Stockdill Substation to connect to its Canberra - Woden transmission line.

A draft Environmental Impact Statement is currently being prepared and will be available for public comment in mid-2017. Subject to environmental approval, construction work will commence in the second half of 2018. Further information on this project can be found on the TransGrid website.

illustrated transmission line map

Site tour with ActewAGL CEO Michael Costello 
Site tour with ActewAGL CEO Michael Costello inspecting the 132kV line route and machinery to pull the Optical Ground Wire (OPGW)

Narrabundah – Hume Primary Main Extension natural gas supply

Capacity to deliver approximately 30,000 scmh needs to be introduced into the gas distribution networks in Queanbeyan and surrounding areas over the next 20 years to supply demand for the areas of Jerrabomberra, Queanbeyan, Fyshwick, Hume and the proposed new developments at Googong and Tralee. To cater to this growth, ActewAGL plan to construct a new 5 km primary main and a new Primary Regulating Station (PRS) at Hume.

The new primary main will extend from the existing Jerrabomberra Package Off-take Station (POTS) at Narrabundah to a junction at the corner of Lanyon Drive and Monaro Highway at Hume. The planned location of Hume PRS is in Section 18, north of Lanyon Drive, east of the Monaro Highway and south of the new SES training facilities.

Together, these facilities will ultimately supply natural gas to approximately 25,000 customers in the areas of Jerrabomberra, Queanbeyan, Fyshwick, Hume, and the future proposal developments of Googong and Tralee. In addition, they will provide long-term capacity for prospective large consumers in Hume and provide a long-term supply into the Hume – Tuggeranong Interconnection (HTI).

Hume-Tuggernong (HTI) natrual gas supply

ActewAGL has commenced major capital works to enhance the capacity and reliability of natural gas supply to Hume and Tuggeranong to meet future commercial and residential growth in these areas.

The natural gas network in Canberra’s Tuggeranong district is approaching its designed winter capacity. To support growing demand and ensure continuity of supply over the next 20 years, it is forecast that approximately 27,000 cubic metres per hour of gas will be needed in the Tuggeranong area. To achieve this, a gas network interconnection is required between Hume and Monash and will be constructed in two stages:

Stage

Works

Timing

HTI-1

Installation of 2.4 km gas main along the Monaro highway between Lanyon Drive and Tralee Street, Hume. (See Figure 1 below)

Completed

HTI-2

Construction of a 5.3 km gas main along the Monaro Highway and Isabella Drive to Ashley Drive, Monash.

Completion due April 2013

Stage 1 of the project is now complete. Project Management and site supervision was performed by Jemena Asset Management. Construction was undertaken by civil engineering contractors Diona Pty Ltd.

Onsite activity included open trench excavations and welding of pipe. Trenchless technology including boring and directional drilling was also employed to avoid damaging the root systems of nearby trees.

Stage 2 of the project is expected to commence mid 2012.

Closely related to this project is the extension of primary gas mains from Narrabundah to Hume, together with the construction of a new Primary Regulating Station at Hume. Programmed for completion before winter 2013, these facilities will ultimately supply approximately 25,000 customers in the areas of Jerrabomberra, Queanbeyan, Fyshwick, Hume, and the future proposed developments at Googong and Tralee. In addition, these facilities will further reinforce supply of natural gas to Hume and Tuggeranong.

Figure 1: Locality Plan — Hume–Tuggeranong Interconnection Stage 1

HTI locality plan - Hume Tuggeranong Interconnection Stage 1

Figure 2: Pipes laid in preparation — Hume–Tuggeranong Interconnection Stage 1

Pipes laid in preparation - Hume Tuggeranong Interconnection Stage 1