The positive, negative and zero sequence reactances of a 20MVA, 13.2kV synchronous generator are 0.3pu, 0.2pu and 0.1pu respectively. The generator is solidly grounded and it’s not loaded. A line-to-line fault occurs at the terminals of the unloaded generator. Calculate the fault current and the line voltages.
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
The positive, negative and zero sequence reactances of a 20MVA, 13.2kV synchronous generator are 0.3pu, 0.2pu and 0.1pu respectively. The generator is solidly grounded and it’s not loaded. A line-to-line fault occurs at the terminals of the unloaded generator. Calculate the fault current and the line voltages.
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