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Syncronous Generator question

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coshkun

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syncronous generator

I need the solution of that question urgently.Please help!
when a 60 KVA 240 V 50 hz single phase sync.generator is excited with 10 A ,its no-load voltage is 175.When it's short circuited and excited with 10 A its short circuit current is 376.Efective armature resistor 0.075 ohm.when it's working 0.8 leading at full load what is the voltage regulation %
 

S=U.I
I=S/U=60kva/240v
I=250A; 0.8 leading
I=250<36.87 A

Ea=IaRa+Vo
Ea=(250<36.87)(0.075)+175<0
Ea=18.75<36.87+175<0
Ea=15+j11.25+175
Ea=190+j11.25 v
Ea=190.33<3.4 v

Vr=(190.33 - 175)/175 *100
Vr=8.76%
 

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    coshkun

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