AusNet Services’ network operates in a unique geographical location, some of which is exposed to extreme bushfire risk. These conditions warrant significant investment to mitigate the risk of bushfires as a result of earth faults on the distribution network.
Client
AusNet Services
Project duration
Completed 2020
Description
The Wodonga terminal station is unique in AusNet Services rapid earth fault current limiter) program in that it is principally a transmission asset serving the Victoria/NSW interconnector and providing a 66 kV sub-transmission connection point to the distribution business.
Our team was the Principal Contractor which included the Civil Constructions Primary, Secondary & commissioning of this complex project.
Scope of work
- Installation of 2 x GFNs
- Replacement of 2 existing 22kV Neutral Earthing Compensators (NECs) that are connected to the tertiary of the existing 330/66/22kV transformers and associated reactors
- Modification to the existing neutral earthing arrangement to incorporate 2 x 22kV switch neutral bus kiosks and associated neutral isolators
- Installation of 1 combined REFCL room; · Replacement of 2 existing station service transformers (SSTx) with 750kVA kiosk type units
- Installation of new 22kV capacitor bank No.2
- Replacement of existing 22kV capacitor bank No.1 for GFN compliance
- Installation of a zero sequence CT at each 22kV feeder cable circuit
- Replacement of existing 22kV VT for GFN compliance
- Replacement of existing transformer tertiary cable box, including replacing the existing transformer tertiary connected cables with 19/33kV rated cables
- Installation of new cabling suitable for use with GFN operation
- Modification of existing Cap Bank
- Installation of new Cap Bank
- Installation and modification of associated secondary protections system
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