Combined Cycle Procedures

The objective of this module is to review the main features of combined cycle power plants, including major components, auxiliary systems and variations in plant configuration.

After completion of this module, the participant will be able to understand the following concepts, and apply them in day-to-day work activities.

• The construction and function of major components.
• The simple cycle industrial gas turbine.
• The aero derivative gas turbine.
• The front end mounted generator.
• Heat recovery.
• Production of steam in the HRSG.
• Steam supply for co-generation.
• Steam turbine cycle.
• Function of the steam turbine condenser
• Relation between steam turbine power output and gas turbine power output in combined cycle.
• The two two-one configuration, i.e. two gas turbines feeding one steam turbine.
• Combined cycle efficiency compared with fossil fired condensing steam turbine cycle efficiency.
• Advantages of the combined cycle.
• Typical auxiliary systems required to support the major components.
• Typical gas turbine auxiliary systems.
• Typical generator auxiliary systems.
• Control of gaseous emissions to meet environmental standards.
• Monitoring and control systems.
• Steam turbine generator auxiliary systems.
• HRSG auxiliary systems.
• Features of supplementary firing.
• Objectives and responsibilities of the operating team.
• Plant safety.
• Plant maintenance.