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clc,clear
printf('Example 6.34\n\n')
X_d=0.8,X_q=0.5 //both per unit
R_a=0 //assumed
phi=acos(0.8)
V_t=1//pu
I_a=1 //full-load
psi=atan( (V_t*sin(phi)+I_a*X_q)/(V_t*cos(phi)+I_a*R_a) )
delta=psi-phi
I_d=I_a*sin(psi)
I_q=I_a*cos(psi)
E_f=V_t*cos(delta)+I_d*X_d+I_q*R_a
printf('Open circuit voltage is %.3f p.u.',E_f)
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