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Electrical Machines

During a short circuit test, a star connected Synchronous Generator produces 120 A of short-circuit
Armature current per-phase at a DC field current of 2.8 A. At the same field current the open-circuit
line voltage is 525 V.
a. Calculate the saturated synchronous reactance under these
b. If the Armature Resistance is 0.5 Ω per-phase and the generator supplies 100 A per-phase to
a purely resistive load of 2.7 Ω per-phase. Calculate the corresponding generated voltage
and load angle.
c. Determine the voltage regulation as in b),
d. Draw and Label a simple graph for the OCC and SCC tests. Include on the graph the
synchronous reactance. Show appropriate axes and the air-gap line. (5)