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//Electric machines and power systems by Syed A Nasar
//Publisher:TataMcgraw Hill
//Year: 2002 ; Edition - 7
//Example 5.1
//Scilab Version : 6.0.0 ; OS : Windows
clc;
clear;
Q=2500; //power in KVA
v=6600; //3phase voltage in v
pf=-0.8; //power factor
Xs=10.4; //syncronous reactance in ohm
ra=0.071; //armature resistance in ohm
th=acosd(pf);
vt=v/(3^(1/2));
Ia=Q*10^3/((3^(1/2))*v);
t=cosd(th)-%i*sind(th);
Iad=Ia*t;
v1=Iad*Xs;
v0=vt+%i*v1;
Reg=(abs(v0)-vt)/vt*100;
printf('The regulation is %f ',Reg)
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