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Project Scope

Partum with the use of 220kV Gas Insulated Switchgear (GIS) developed an innovative approach to substation design to support Fortescue in their plans for establishing the Pilbara Transmission Project (Stage 1) that consisted of four 220kV substations and 220km of 220kV transmission lines.

The development of Solomon 220/132/11kV Substation consisted of:

  • 1x 100MVA 220/132/11kV Power Transformers with oil bund, firewall, and oil water separator system
  • 2x 118MVA 132/11kV Generation Power Transformers with oil bund, firewalls, and oil water separator system
  • 2x 11MVAR 11kV Reactors with oil bund, firewall and oil separate system
  • 5 (+3 future) 220kV Double Busbar Indoor Gas Insulated Switchgear (GIS) and 2x Bus Voltage Transformers Bays
  • Earthing, Lightning, Lighting and CCTV System
  • Combined Control and Switchroom Building
  • AC and DC auxiliary supplies including Emergency Generator
  • 13x 11kV MV GIS Switchgear Panels with Bus Coupler
  • Protection, Synchronising and Disturbance Recorder Panels
  • SCADA and Communications Panels

Challenges Overcome

  • Integration of the GIS across the civil, structural, primary and secondary design aspects
  • Evaluating operability and maintainability considerations for the GIS
  • Interfacing with a large number MV cables with the power station, BESS and load bank
  • Synchronising and Auto Voltage Regulation (AVR) system interfacing with existing power station, new power station, existing 132kV substation and new 220kV Pilbara transmission network
  • Seeking to electrically separate the solidly grounded 220kV with the high impedance grounded 132kV system
  • Extremely tight project timeframes with multiple substations being designed in parallel
  • Managing the tendering, cost evaluation, design review and technical input for equipment vendors
  • Large distance between Solomon Substation and Lambda Terminal, for SCADA and telecommunications

Solution

  • Development of a substation solution with a footprint ~30% of existing Air Insulated Switchgear substation
  • Interfacing Gas Insulated Busbar (GIB) with the power transformers and overhead line circuits
  • Working closely with the OEMs, particularly for the 220kV GIS given new technology
  • Development of architectural and structural design for GIS Building incorporating gantry crane and HVAC system
  • Use of IEC61850 within the control room and on several field devices
  • Incorporating power transformer energisation kiosk into the AC changeover and MV Switchgear
  • Working collaboratively with FMG to develop protection, SCADA and communication philosophies
  • Cable trench and ladder design for MV cables to interface with the power station, BESS and load bank

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