(1) A 33 kV, 3-phase, star-connected synchronous generator with synchronous impedance of 1.4 2/phase is delivering 240 MW at unity power factor to a 33 kV grid. Calculate the following: The phase voltage and phase current. The voltage generated by the synchronous generator.

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4,
(1)
(iv)
A 33 kV, 3-phase, star-connected synchronous generator
with synchronous impedance of 1.4 0/phase is delivering
240 MW at unity power factor to a 33 kV grid.
Calculate the following:
The phase voltage and phase current.
The voltage generated by the synchronous generator.
If the excitation is increased by 25 %, then the turbine power
driving the generator is increased till the machine delivers
280 MW.
Calculate the new voltage generated by the synchronous
generator,
Calculate the new current and power factor.
Transcribed Image Text:4, (1) (iv) A 33 kV, 3-phase, star-connected synchronous generator with synchronous impedance of 1.4 0/phase is delivering 240 MW at unity power factor to a 33 kV grid. Calculate the following: The phase voltage and phase current. The voltage generated by the synchronous generator. If the excitation is increased by 25 %, then the turbine power driving the generator is increased till the machine delivers 280 MW. Calculate the new voltage generated by the synchronous generator, Calculate the new current and power factor.
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