Project Scope

Partum Engineering was engaged by Mineral Resources to support the Onslow Iron Port Project with comprehensive high-voltage submissions for a new power generation and distribution system.

The project scope includes an interim submission to initiate HV cabling work and a detailed submission encompassing development of and updates to the DIgSILENT PowerFactory model, load flow and short circuit studies, protection coordination, and arc flash hazard analyses.

Key infrastructure features involve nine 1558 kWe generators, additional capacity for future expansion, a 1.5 MVA Battery Energy Storage System (BESS), 11 kV cable interconnections, earthing transformers, and multiple high-capacity distribution transformers.

Optional earthing simulation studies based on MRL’s design are also included in the scope. This work aims to ensure a robust and safe electrical infrastructure for the port facility.

Challenges Overcome

  • Expedited delivery timeframes to ensure High Voltage Submission documents were available for the landing of key equipment and energisation to meet production schedules
  • Greenfield port facility with no existing power system model
  • Energisation of site infrastructure occurring in stages requiring a full suite of power system and earthing studies to ensure staging of proposed designs are well integrated
  • Integrating temporary power station installations to supply power to key infrastructure to meet production schedules due to delays in main site power station works.

Solution

  • Leveraged using client document templates for reports to assist with reducing review timeframes for familiarity with document format
  • Paralleling of key deliverables with multiple resources to expedite works
  • Development of comprehensive DIgSILENT PowerFactory model encompassing the full site power network from generation to low voltage distribution to facilitate the power system studies and protection assessments
  • Conducted comprehensive protection coordination assessments, covering generator differential protection, HV feeder protection, and low voltage main switchboard protection, optimising settings to prevent delays in staging works and minimize re-testing or re-commissioning of protection devices due to setting changes
  • Expedited works to facilitate temporary power station installations by inserting the temporary power station studies and outcomes into the overall site High Voltage Submission to mitigate the timeframe required to prepare additional standalone documentation specific only to the temporary power station.
  • Undertaking additional power system studies including arc flash hazard analysis and preparing temporary labels for the temporary power stations to mitigate excessive PPE requirements with respect to supply from the main site power station.

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