A synchronous generator has parameters as shown in table below. 1. Voltage Rating 30 kV, 3-phase...

A synchronous generator has parameters as shown in table below.

1.	Voltage Rating	30 kV, 3-phase	5.	Frequency	50 Hz
2.	Power Rating	50 MVA	6.	Rotor	Round
3.	Synchronous Reactance, X_S	7 Ω /phase	7.	Connection	STAR
4.	Armature resistance, R_a	1.5 Ω /phase	8.	Excitation Type	Permanent Magnet

An inductive load of 30MW at 0.8 power factor at rated terminal voltage is connected to the synchronous generator to an infinite bus. Determine the excitation voltage per phase and its corresponding power angle. Sketch a phasor diagram for this condition.?
With reference to (a), without losing synchronism, what will be the maximum power the generator will be
able to deliver? Also, determine the armature current at this condition.?
Turbine torque is reduced until generator output is 15MW while excitation is held constant as in (a) above,
determine the power angle, armature current, and power factor.?
If now the load has changed to a rated power at rated voltage load, with a leading power factor of 0.8,
determine the percentage voltage regulation of this generator.?

Expert Solution

Manojponduru answered 7 months ago

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