Upon the successful completion of this course, each participant will be able to:-

• Apply systematic techniques in operation, maintenance, control, testing and troubleshooting of power generators
• Determine how a generator functions and how an active and reactive power is generated and how these loads are shared from one generator to another
• Identify the major components used in the construction of an AC generator and discuss how these components are at risk during mis- or abnormal operations
• Explain operation and maintenance of the most common excitation systems and how a speed governor alters generator output in response to a frequency deviation
• Discuss how the voltage regulator alters generator output in response to a voltage deviation
• Identify the causes and effects of both voltage and frequency oscillations and the impact on power system dynamics
• Describe generator normal/safe startup and shutdown procedures and generator synchronizing process
• Discuss abnormal generator operation, recommend actions for generator protection during an unfortunate abnormal condition and describe possible results to equipment and/or system
• Describe the major activities associated with generator maintenance, proper generator disassembly and reassembly sequences, procedures for cleaning generator
• components, procedures for inspection of generator components and describe the different types and causes of damage
• Identify the various repair methods for defective component condition and list all those electrical tests commonly performed on large AC generators
• Describe the procedures for the various generator tests and describe safety precautions for the conducting of these electrical tests

Electrical Engineers / Technicians

Day-1

Generator Theory

• Armature Reaction
• Resistive Loads
• Inductive Loads
• Capacitive Loads
• Power Transfer and Load Angle
• Reactive Power
• Net Air Gap
• Developed Torque
• Watt and VAR Control
• Generator Capability
• Stator Winding Heating
• Field Heating
• Core End Iron Heating
• Power System
• Power Transfer Between Generator Rotor and Stator
• Short Circuit Ratio
• Fundamentals of Generator Design
• Review of AC Power
• Armature Reaction
• Development of Torque
• Net Air Gap Magnetic Fields
• Effects of VARs on Current
• Effect of VARs on Voltage
• Active and Reactive Power Flow
• Generators Operating Under Load
• Changing MW load
• Changing MVAR load

Day-2

System Operations

• Structure of the Power System
• Interconnections
• Power Balance
• Operation of the System
• State of the Power System

Generator Construction

• Stator Frame
• Core, Windings
• End Shield
• Rotor Body
• Field Windings
• Retaining Rings
• Collector Rings
• Hydroelectric Differences

Day-3

Excitation Systems, Voltage & Frequency Control

• Speed Governor Response to Frequency Deviations
• Automatic Voltage Regulator Response to Voltage Deviations
• Manual Regulator
• URAL
• Impedance Compensator
• Volts/Hertz
• Maximum Excitation Limit
• Transfer & Tracking
• PSS
• De-Excitation

Steady State Operation

• Transient Conditions
• Earlier Excitation Systems
• Rotating AC Exciters
• Alterrex
• Brushless Excitation Systems
• Static Excitation Systems

Day-4

Generator Auxiliary Systems

• Purpose and Operations of the Generator Hydrogen Control System
• Generator Seal Oil System
• Stator Liquid Cooling System (as required)

Normal Operations

• Preparation for Start-Up
• Synchronizing
• Load Changes
• Use of Reactive Capability Curve
• Shut-down

Abnormal Operations:

• System Steady & Dynamic Conditions
• Frequency Deviations
• Voltage Deviations
• Instabilities
• Loss of Synchronism
• Stator Overcurrent
• Field Ground
• Stator Ground Fault
• Stator Phase-to-Phase Fault
• Over Voltage
• Over Volts-per-Hertz
• Field Overheating
• Loss of Excitation
• Bearing Vibration
• Synchronizing Errors
• Motoring
• Seal Oil System Pressure

Day-5

Outage Planning & Scheduling

• Why Maintenance
• Preparation
• Tooling
• Documentation
• Pre-Shutdown Maintenance
• Decision Making

Generator Electrical Tests

Stator

• Winding Resistance
• Insulation Resistance
• Dielectric Absorption
• Direct Current Leakage
• Dissipation Factor Test
• Radio Noise (Corona)
• High Potential Test
• Ring Test

Rotor

• Resistance Test
• PI
• Impedance Testing
• Flux Pattern Test
• Air Gap Flux Probe Testing

CDGA attendance certificate will be issued to all attendees completing minimum of 80% of the total course duration.