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South Pine 275/110kV Rebuild Stage One

Ensuring a secure and reliable high voltage electricity supply to north-eastern Brisbane

Client
Powerlink
Project Duration
Commenced: 2007 - Completed: 2010
Location
Brisbane, Queensland
Project Overview

Powerlink owns, operates, develops and maintains Queensland’s high voltage electricity transmission network. This network transports electricity in bulk from power generators to the regional distribution networks (owned by Energex, Ergon Energy, and Essential Energy) which provides electricity to around two million users for homes and industrial purposes.

Powerlink’s South Pine bulk supply electrical substation is located on the northern fringe of Brisbane. The substation is comprised of both 275kV and 110kV switching yards.

Powerlink engaged UGL to undertake the design, construction and testing component of this important project to help secure the future electricity supply to the northern suburbs of Brisbane. The project was uniquely complex, with a substation rebuild undertaken on the same site footprint without impacting the existing electricity supply network.

The Challenge

South Pine Substation, which was originally built in the 1960s, is one of the largest substations in Queensland.

To meet the immediate and future power needs of the population and industry in the area, a major rebuild and refurbishment was required that included the extension of existing 110 and 275kV yards, building flood storage and canals, drainage and retaining walls.

The project also required an expansion to the East (within land already owned by Powerlink) with the installation of new equipment and general refurbishment of the existing substation. Additionally the project would require additional vegetation screening which involved the moving of approximately 50,000m3 of earth and importing 30,000 tonnes of road base.

The Solution

UGL’s expertise in power transmission and substations was employed for this project, which included the design, construction and testing of the extension of the South Pine 275/110kV Substation, including the supply of all plant, material and labour.

Before the construction and refurbishment project could begin, the site was selectively cleared of existing infrastructure, roads and drainage. This included the decommissioning of existing 110kV bays in the eastern and western areas of the existing substation.

Specifically, UGL’s specialist team delivered:

  • 1 x 275kV Static Var Compensator (SVC) Bay within an existing bay and associated equipment (excluding the SVC)
  • 2 x 275kV Breakers and a 2 x half Diameter Circuit Breakers and associated equipment
  • 2 x 275kV Capacitor Bank Bays and associated equipment for 2 x 300kV 140MVAr Capacitor Banks
  • 2 x 275kV Transformer Bays and associated equipment for 2 x 275/110kV 375MVA Transformers
  • 17 x 110kV Feeder Bays and associated equipment
  • 5 x 110kV Transformer Bays and associated equipment
  • 3 x 110kV Bus Coupler Bay and associated equipment
  • 3 x 110kV Bus Section Bays and associated equipment
  • 4 x 110kV Bays and associated equipment for a 4 x 123kV, 62.5MVAr Capacitor Banks

In the planning and execution of this project, UGL employed one project manager, one construction manager, two supervisors, three leading hands and on average ten tradesmen.

Key Outcomes and Benefits

Leveraging UGL’s strengths in the construction of electrical power transmission infrastructure, this solution enabled Powerlink to transport electricity safely and efficiently to distribution points within the grid.

Importantly, UGL safely decommissioned and removed obsolete equipment by mobilising the company’s unique end-to-end asset management solution.

Key outcomes included:

  • UGL’s specialist engineering and project teams provided a distinct advantage for the client in driving the most effective project solution focused on budget and on-time delivery
  • UGL designed the transmission system in accordance with Powerlink’s design standards ensuring maximum flexibility, functionality, reliability and community acceptance, tailored to meet the client’s time and budget constraints
  • All construction work was carried out in accordance with an Environmental Impact Statement (EIS) and an Environmental Management Plan (EMP) which outlined strategies and actions to manage any potential environmental and community impacts
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