What do you mean by synchronizing of alternator?

     

     The process of connecting two alternators or an alternator and an infinite bus bar system in parallel is known as synchronizing. Generally, alternators are used in a power system where they are parallel with many other alternators.

     Actually, it is a way of matching the speed and frequency of an alternator or other source to a running network or grid. Once the alternator is connected to the grid it starts delivering power to the electric grid.

     A stationary alternator is never connected to live to busbars because it will result in a short circuit in the stator winding (since there is no generated emf yet). Before connecting an alternator to the grid, the following conditions must be satisfied:
  • Equal voltage: The terminal voltage of the incoming alternator must be equal to the bus-bar voltage.
  • Similar frequency: The frequency of generated voltage must be equal to the frequency of the bus-bar voltage.
  • Phase sequence: The phase sequence of the three phases of the alternator must be similar to that of the grid or busbars.
  • Phase angle: The phase angle between the generated voltage and the voltage of the grid must be zero.
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