Maintenance Of Electric Generators
Course Code:
EM29
Course Objective
- Elaborate on different types of power system generation
- Discuss operations of the steam and gas turbines
- Examine different types excitation systems
- Explore different types of switch gear associated with generator systems
- Identify automatic voltage regulating techniques and governors
- Describe troubleshooting techniques and online monitoring
Target Audience
- Electrical Engineers
- Electrical Supervisors
- Electrical Technicians
- Electrical Project Engineers
Course Outline
DAY 1: Definitions, Communications Protocols, Interpretation and Use of Drawings, Maintenance Planning and The Use of Test Equipment
- Generator Systems AC and DC components
- Operation and Maintenance of Generator Systems
- Thermal Power Generation
- Synchronous Machine Stator Construction and Characteristics
- Synchronous Machine Rotor Construction and Characteristics
- Instrumentation associated with Generator Systems
- Single Line Diagrams
- IEC 61850 and GOOSE
DAY 2: The methods of generator excitations and importance of reactive power
- Functions and Construction of the Automatic Voltage Regulator (AVR)
- Functions and Construction of the Govenors
- Over Fluxing
- Types of Excitation Systems
- Self-excitation vs. Brushless
- Effects of over Excitation
- Effects of under Excitation
- Reactive power relationship to Excitation
DAY 3: Economical and mechanical impacts on over and under excitation control systems
- Control Systems for Excitation
- Impact of over Excitation
- Impact of under Excitation
- Importance of the Capability Curve
- Interpreting the Capability Curve
- Generator Stator Thermal Effects
- Generator Rotor Thermal Effects
- Improvements of Generators Excitation Systems
Day 4: The Generator Circuit Breaker, Operation of Generator Step Up Transformer and Power Monitoring
- Generators Circuit Breaker Construction
- Vacuum and Gas Filled Generator Circuit Breakers Characteristics
- Construction of Power Transformers
- Generator Step Up Transformer (GSU)
- GSU selection criteria
- Power Monitoring
- Load Frequency Control
- Optimisation of Generator output related to speed, frequency and excitation
DAY 5: Common Generator Faults, Numerical Protection Relays Functionalities and Synchronisation
- Numerical Relay Generator Protection
- Generator Earth Fault Relays
- Phase Imbalance
- Synchronisation Generator conditions and merits
- Common Generator Problems
- Cooling of Generators
- Online Monitoring of Generator
- The design of financial models for forecasting and decision-making
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