A 10 MVA, 3-phase , Y-connected, two pole,60 Hz, 13.8Kv, line to line turbogenerator has air- gab characteristics depicted in the following data : O.c.C. Vph :2700 5500 7200 8200 8800 9400 9600 9900 10200 S.C.C. Isc: 130 250 490 620 740 850 It : 50 100 150 200 250 300 350 400 450 The armature winding resistance is 0.07'n per phase and the armature winding leakage reactance per phase is 1.9 n. Find the field current that produced rated terminal voltage when rated armature current is delivered to 0.8 lagging Pf three phase balanced load. Use the non-linear general method.

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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.