Testing & Commissioning
From Reassembly to Reliable Operation.
Post-overhaul testing and commissioning services to verify mechanical condition, auxiliary systems, instrumentation, protection and turbine-generator operation before return to service.
Closing the Overhaul Loop
Reassembled Is Not the Same as Ready to Operate.
After mechanical reassembly, the turbine-generator unit must pass a structured series of checks and tests before returning to normal operation.
Each stage verifies the work completed before moving to the next operating condition.
Pre-Commissioning Checks
Before startup, completed overhaul work and relevant turbine-generator systems are checked to confirm readiness for operation.
Mechanical
- Final mechanical inspection
- Rotor / shaft-line related checks
- Bearing condition
- Coupling / alignment confirmation
- Relevant clearances
- Fastener / connection checks
- Turning gear readiness
Systems
- Lubricating oil system
- Jacking oil system
- Relevant pumps
- Oil circulation
- Cooling systems where applicable
- Vacuum-related systems
- Valve readiness
Electrical & Control
- Generator-related checks
- Instrument verification
- Relevant control signals
- Protection-related checks
- Excitation / AVR-related checks
Oil System Verification
Protect the Bearings Before Turning the Rotor.
Lubricating and jacking oil systems are checked before turbine-generator rotation to verify that relevant pumps, flow paths, pressures and system functions are ready for operation.
- Oil-system circulation
- Pump operation
- Jacking oil operation
- Leakage inspection
- Relevant valve verification
- Filter / system condition
- Bearing oil supply checks
- Oil flushing where required by project scope
Turning Gear & Rotor Rotation
Turning operation provides an important transition between static mechanical completion and turbine startup.
- Turning gear operation
- Rotor rotation condition
- Bearing observation
- Abnormal sound inspection
- Relevant oil-system condition
- Rotor / shaft-line observation
- Instrument indications
- Pre-start mechanical condition
Instrumentation & Protection Verification
Relevant turbine-generator instruments, signals and protection functions are verified before and during return to operation according to project scope.
Verification scope is determined according to unit configuration and project requirements.
Valve & Governing Functional Checks
Relevant steam admission, governing and actuation components are functionally checked before turbine operation where included in the overhaul scope.
- Main stop valve function
- Governing / control valve function
- Valve stroke verification
- Actuator checks
- Relevant LVDT / position feedback
- Governing response checks
- Trip-related functional verification where applicable
Generator & Excitation Checks
Generator mechanical and electrical condition is verified together with relevant excitation functions before synchronization and load operation.
- Final generator inspection
- Electrical test review
- Bearing condition checks
- Generator instrumentation
- Excitation circuit checks
- AVR-related checks
- Relevant protection verification
- Pre-synchronization readiness
First Rotation Under Operating Conditions
Watch the Machine as It Comes Back to Life.
During startup, turbine-generator operating parameters are monitored carefully as speed increases and the unit transitions from overhaul condition to operation.
Vibration Monitoring
Vibration behavior during turning, startup and operating conditions provides important information about the turbine-generator shaft train after overhaul.
- Startup vibration observation
- Bearing vibration monitoring
- Shaft vibration monitoring where applicable
- Speed-related observation
- Trend comparison
- Operating-condition verification
No-Load Operation
Before taking load, the turbine-generator is observed under appropriate operating conditions to verify stability and relevant system behavior.
Synchronization
From Mechanical Operation to Power Generation.
After required turbine-generator checks are completed and operating conditions are satisfactory, synchronization support can be provided according to plant procedures and project scope.
Synchronization is performed in coordination with the plant's operating team and applicable operating procedures.
Load Testing & Operating Verification
Following synchronization, turbine-generator behavior can be monitored as load is introduced and operating conditions are established.
If Something Is Not Right, We Go Back to the Cause.
Abnormal conditions identified during commissioning are reviewed before the unit progresses to the next operating stage.
Final Verification & Handover
Verify. Document. Return to Service.
Commissioning close-out includes final observations, documentation and handover to the plant operating team.
Complete Commissioning Journey
MECHANICAL COMPLETION
PRE-CHECKS
OIL SYSTEM
TURNING
FUNCTIONAL TESTS
STARTUP
NO LOAD
SYNCHRONIZATION
LOAD
RETURN TO SERVICE
MECHANICAL COMPLETION
PRE-CHECKS
OIL SYSTEM
TURNING
FUNCTIONAL TESTS
STARTUP
NO LOAD
SYNCHRONIZATION
LOAD
RETURN TO SERVICE
One Complete Overhaul Cycle
From Opening the Casing to Returning the Unit to Service.
Proven in the Field
From Overhaul to Startup.
Reassembly
Final Inspection
Alignment Check
Commissioning
Startup
Testing
Ready for Startup
Completing an Overhaul? Let's Bring the Unit Back Online.
Send us the turbine-generator information, overhaul scope, planned startup schedule and testing requirements. Our team can review the commissioning scope with you.