Gas Turbine Series

The objective of this course is to present the features of control and protection systems as used on gas turbine installations. The previous tape GT 3 dealt with operating parameters and potential hazards thus laying the groundwork for study of control and protection devices.

Upon completion of this course and associated workbook, the participant should understand and be able to apply the following concepts:

• The function of the control system
• The control loop
• Sensing devices
• Actuators
• Controllers, mechanical, electronic, digital
• Reliability i.e. redundant (duplicate) equipment
• Operator interface
• Display of information
• Inputting commands
• Controlling turbine output – FSR (Fuel Stroke Reference)
• Automatic start-up sequence, permissives
• Speed sensors, switches, relays
• Modes of control, start-up, speed/load, temperature
• Pre-set FSR, Limitations
• Speed/load control, governor characteristic
• Loading rate limitations
• Automatic shut-down sequence
• Spin cooling, fired shut-down
• Exhaust temperature control
• Monitoring thermocouples, spread
• Monitoring combustion conditions
• Alarms and trips
• Flameout protection
• Overspeed protection
• Overtemperature protection
• Vibration protection