Origin engaged Ampcontrol to deliver shutdown electrical testing and maintenance at its Darling Downs Power Station, a gas-fired combined-cycle power station located approximately 40 km west of Dalby, Queensland.
The site comprises three gas turbines and a steam turbine, supplying electricity into the Queensland grid. Origin required a partner to complete scheduled five-yearly preventive maintenance on high-voltage and low-voltage switchgear, excitation transformers, and large motors during a planned outage, supported by detailed test documentation and reporting.
Services
Our Townsville high voltage and switchgear technicians completed a broad scope of testing and maintenance over a two-week shutdown, including:
Planning and documentation
- Development of test plans, test procedures and a program of works
- Job safety and environmental risk analysis for each task
High-voltage switchboards and motor starters
- Five-yearly preventive maintenance of 6.6 kV process distribution centre switchboards and associated circuit breakers
- Inspection, cleaning and testing of high voltage motor starter cubicles
Excitation transformers and current transformers
- Five-yearly maintenance and electrical testing of gas turbine and steam turbine excitation transformers
- Inspection and testing of spare high voltage current transformers
Low-voltage distribution equipment
- Five-yearly maintenance of low-voltage switchgear, motor control centres and circuit breakers
- Functional testing to confirm correct operation and protection performance
High-voltage motors
- Preventive maintenance and electrical testing of boiler feed pump high-voltage motors
Reporting and analysis
- Analysis of test results against performance standards, manufacturer data and engineering references
- Delivery of a comprehensive outage report for Origin’s asset management and compliance records
Outcomes
The shutdown testing and maintenance program at Darling Downs Power Station:
- Verified the condition and performance of key high voltage and low voltage electrical assets
- Identified any emerging issues to support future maintenance planning
- Supported Origin’s compliance with relevant standards and internal asset management requirements
- Was delivered safely and within the planned two-week outage window by a seven-person team
The project met requirements for technical expertise, site support, safety, budget, and adherence to schedule. The project demonstrates our Townsville team's capability to support complex power generation assets through structured high-voltage and low-voltage testing and maintenance during major outages.
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