Gas Turbine Series

The objective of this course is to draw attention to important operating parameters of the Power Generator. A review of fundamentals is included as an aid to understanding the significance of generator control. Upon completion of this course, the participant should understand and be able to apply the following concepts:

• The generator’s function: energy conversion
• Features of generator construction
• Stator winding, rotor winding
• Static exciter, collector rings, rotating exciter
• Open cycle air cooling
• Closed cycle air cooling
• Advantages of hydrogen cooling
• Hydrogen pressure control, leakage compensation
• Hydrogen seals, seal oil system
• Hydrogen explosive range
• Procedures for purging
• Fundamentals of ac generation
• Relationship between frequency, speed, and number of poles
• Single phase and 3-phase generation
• 3-phase system
• Required conditions for synchronizing
• Controlling generator power output
• Reason for change in power output requirements
• Combined operation of governors
• Load sharing between parallel generators
• Static excitation system
• Brushless excitation system
• Effect of changing excitation current
• Control of voltage and MVAR output
• System demand for MVARS
• Generator MVA output
• Power factor
• Generator capability curve