High Voltage Testing & Commissioning

Case Study: Nyngan Solar Power Plant

Location: New South Wales

Customer: First Solar (Australia)

Scope: Site Acceptance Testing of HV Electrical Equipment

 WORKS

STE Solutions were engaged to conduct the site acceptance testing of the electrical equipment at the Nyngan Solar Power Plant, this equipment included the following items:

  • 1600KVA Skid Mounted Transformers
  • 10KVA Pad Mounted Transformers
  • 36kV Ring Main Units
  • 110VDC Battery Banks
  • Protection and Control Systems

Case Study: Boco Rock Wind Farm

New South Wales

Customer: CWP Renewables

Scope: HV Testing of 132kV Primary Plant

WORKS

STE Solutions have been awarded a 10 year contract to conduct the Balance of Plant Maintenance, this work includes but is not limited to the following:

HV Testing of Primary Plant and equipment

  • Dielectric Loss Angle (DLA)
  • Capacitance
  • Leakage Reactance
  • SFRA
  • Winding Resistance
  • Voltage Ratio
  • Turns Ratio

The use of the following testing equipment by highly trained and experienced technicians enabled STE Solutions to provide comprehensive reports which identified that all of the plant tested was fit for service:

  • Doble M4100 test unit
  • Doble M5000 Sweep Frequency Response Analyser
  • Tettex Turns Ratio Tester
  • Megger BM25 Insulation Tester
  • Megger DLRO 600 Micro-ohmmeter
  • AVO DC Winding Test Unit

Case Study: Clements Gap Wind Farm

South Australia

Asset Owner: Pacific Hydro

Scope: HV Testing of 132kV Primary Plant

WORKS

STE Solutions were awarded a package of works by Pacific Hydro to conduct the HV testing of the 132kV Primary Plant at their Clements Gap Wind Farm Substation in South Australia as part of their asset management programme.

These works included the testing of:

  • Current Transformers
  • Voltage Transformers
  • Circuit Breakers
  • Power Transformer

The tests performed included:

  • Dielectric Loss Angle (DLA)
  • Capacitance
  • Leakage Reaction
  • SFRA
  • Transformer Winding Resistance
  • Voltage Ratio
  • Turns Ratio (tap changers)

Comprehensive test reports were provided to the client upon the completion of the testing.

Case Study: Select Harvest Almond Processing Plant

Victoria

Client: Trivantage

Scope: Site Acceptance Testing of Electrical Installation

WORKS

STE Solutions were engaged by Trivantage to perform the required acceptance tests on the newly installed HV switchgear, Transformers, Protection Systems and HV Cables at the Selecet Harvest almond processing plant near Robinvale in Victoria.

 

Case Study: Clements Gap Wind Farm

South Australia

Asset Owner: Pacific Hydro

Scope: Testing of the 33kV Reticulation Protection System installed at the Clements Gap Wind Farm.

WORKS

STE Solutions were engaged to conduct the testing of the protection systems by Pacific Hydro as part of their asset management plan.

The following systems were tested and comprehensive reports provided:

  • 33kV Feeder Group 1 – SEL351S Overcurrent & Earth Fault Relay
  • 33kV Feeder Group 2 – SEL351S Overcurrent & Earth Fault Relay
  • 33kV Feeder Group 3 – SEL351S Overcurrent & Earth Fault Relay
  • 33kV DVAR Transformer Feeder – SEL351S Overcurrent & Earth Fault Relay
  • 33kV DVAR Transformer 1 – SEL751A Overcurrent & Earth Fault Relay
  • 33kV DVAR Transformer 2 – SEL751A Overcurrent & Earth Fault Relay
  • 33kV Capacitor Bank Feeder – SEL351S Overcurrent & Earth Fault Relay
  • 33kV Capacitor Bank 1 – Nokian Capacitor Bank Unbalance Relay
  • 33kV Capacitor Bank 2 – Nokian Capacitor Bank Unbalance Relay
  • 33kV Capacitor Bank 3 – Nokian Capacitor Bank Unbalance Relay
  • 33kV Capacitor Bank 4 – Nokian Capacitor Bank Unbalance Relay
  • 27 x 33kV Kiosk Transformer Protection – MG VAP15 Overcurrent & Earth Fault relays
  • 27 x 33kV Kiosk Transformer Guards – Pressure Relief & Overtemp Trips
  • 27 x 690V Kiosk Transformer Surge Arrestors

Case Study: Mumbida Wind Farm

Western Australia

Scope: Annual testing of 22kV protection system and 132kV main transformer differential protection

WORKS

The testing of the protection relays installed in the relevant 22kV circuit breakers associated with the collector group feeders and the incomers from the two power transformers is performed on an annual basis, these relays are function tested and secondary injected.

The “Bus-riser” and “Bus-tie” protection, SEL 587Z relays as well as the transformer differential protection relays, the SEL351 and SEL387A models are also tested and proved functional.

During the process of secondary system testing “As Built” drawings are referenced to ensure they are correct and all connections on the equipment is compliant.

Comprehensive reports are provided to the client along with notification of any defects identified and any recommendations which may have arisen from the testing.