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A 22 KV, 3 phase star-connected turbo- alternator with a synchronous impedance of 1.4 2/phase is delivering 240 MW at unity p.f. to a

A 22 KV, 3 phase star-connected turbo- alternator with a synchronous impedance of 1.4 2/phase is delivering 240 MW at unity p.f. to a 22 KV grid. If the excitation is increased by 25%, then the turbine power is increased till the machine delivers 280 MW. Calculate the new current and power factor. (10)

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