Gas Turbine Series

2503 — Operation of Gas Turbines

Duration: 4.0 Hour(s)

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Power Generation


The objective of this course is to present the factors involved in operation of the gas turbine generating unit, including typical procedures for start-up and shut-down of the unit. On-load operation is discussed with particular emphasis on operating hazards and limitation. The course generally focuses on the heavy industrial type gas turbine. Aero-derivatives are discussed in detail in tape number five in the series.

Upon completion of this course, the participant should be familiar with and be able to apply the following concepts:

  • Objectives of operating maneuvers
  • Auto/manual operation
  • Start-up prerequisites
  • Auxiliary systems required for start-up
  • Turning gear
  • Starting device and torque convertor
  • “Break away” and speed adjustment
  • Necessity for unit purge
  • Ignition and light-off
  • Speed control to synchronization
  • Start-up curve
  • Minimum load setting
  • Change over from start-up to operating conditions
  • Permissible rate of loading
  • Base load and peak load (overload)
  • Governor control, speed droop characteristic
  • Exhaust temperature control (override)
  • Procedure for shutdown
  • Need for even cooling
  • Spin cooling; turning gear
  • Operating hazards; mechanical, thermal, combustion
  • Overspeed
  • Bearing failures
  • Vibration detectors
  • Mechanical unbalance
  • Turbine blade deposits
  • Thermal unbalance, distortion, misalignment
  • Conditions required for combustion
  • Effects of overfiring
  • Loss of ignition, explosion
  • Accumulation of unburned carbon
  • Need for complete monitoring and control system


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