A 3-phase, 30 MVA, 10 kV alternator has internal reactance of 5 % and negligible resistance. Find the external resistance per phase to be connected in series with the alternator so that steady current on short circuit does not exceed 4 times the full load current. ?
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.
A 3-phase, 30 MVA, 10 kV alternator has internal reactance of 5 % and negligible resistance. Find the external resistance per phase to be connected in series with the alternator so that steady current on short circuit does not exceed 4 times the full load current. ?
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