A three-phase star-connected alternator is rated at 1750 KVA, 13.8 KV, The armature resistance and synchronous reactance are 1.2 Ω and 25 Ω per phase respectively. Calculate the percentage regulation for a load of a) 45% load at 0.9 power factor lagging. b) 65% load at 0.75 power factor leading.
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 three-phase star-connected alternator is rated at 1750 KVA, 13.8 KV, The armature resistance and synchronous reactance are 1.2 Ω and 25 Ω per phase respectively. Calculate the percentage regulation for a load of
a) 45% load at 0.9 power factor lagging.
b) 65% load at 0.75 power factor leading.
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