[Science Form 3] Generation of Electricity

Generation of Electricity

• Generator
  Type;
  
  • Thermal.
  • Hydroelectric.
  • Diesel.
  • Nuclear.
  • Gas turbine.
    
    
• Transformer
  Type;
  
  • Step-up transformer.
  • Step-down transformer.
    
    
• Transmission and distribution
  Consist of;
  
  • National Grid Network.
  • Switch zones.
  • Transformer stations.
  • Main substation.
  • Substation branches.
    
    
• Electricity supply
  Type of wire;
  
  • Life wire.
  • Neutral wire.
  • Earth wire.

Electrical Energy Generator

• A device that is used to convert mechanical energy into electrical energy.
  
  
• Induced current - When a moving wire or electrical conductor cuts across magnetic lines of force, electric current will be produced.
  
  
• All electrical energy generators use the same principle of generation:
  
  
  • The turbine is rotated.
    
    
  • The turbine turns the dynamo that is connected to it. The dynamo has a wire coil placed in between a magnet.
    
    
  • The wire coil cuts across the magnetic and electric current is produced.

Thermal Generator

• Coal, petroleum or natural gas are burned in heat water in a boiler to produce steam.
  
  
• Chemical energy --> Heat energy --> Kinetic energy --> Electrical energy