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A three phase, 200 kW, 2300 V, 50 Hz star (wye) connected non-salient rotor synchronous motor...

A three phase, 200 kW, 2300 V, 50 Hz star (wye) connected non-salient rotor synchronous
motor has a synchronous reactance of 11 Ohms per phase. When it draws 175 kW the power
angle is 10 electrical degrees. Neglect the ohmic losses.
a. Determine the excitation voltage per phase.
b. Calculate the supply line current.
c. Determine the supply power factor.
d. Draw the phasor diagram.
e. By what percentage should the field current be changed to minimize the line current.

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