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//Electric Power Generation, Transmission and Distribution by S.N.Singh
//Publisher:PHI Learning Private Limited
//Year: 2012 ; Edition - 2
//Example 16.1
//Scilab Version : 6.0.0 ; OS : Windows
clc;
clear;
V=238; //Transformer primary voltage in kV
Em=110; //Transformer secondary voltage in kV
f=50; //Supply frequency in Hz
u=20; //Commutation angle in degree
alpha1=30; //Delay angle 1 in degree
alpha2=90; //Delay angle 2 in degree
alpha3=150; //Delay angle 3 in degree
Vdo=3*sqrt(3*2)*Em/(%pi*sqrt(3)); //Direct output voltage in kV
Vd1=Vdo/2*(cosd(alpha1)+cosd(alpha1+u)); //Direct output voltage when commutation angle 20 and delay angle is 30 degree in kV
Vd2=Vdo/2*(cosd(alpha2)+cosd(alpha2+u)); //Direct output voltage when commutation angle 20 and delay angle is 90 degree in kV
Vd3=Vdo/2*(cosd(alpha3)+cosd(alpha3+u)); //Direct output voltage when commutation angle 20 and delay angle is 150 degree in kV
printf("\nThe direct voltage output is %.2f kV",Vdo);
printf("\nThe direct voltage output when commutation angle 20 and delay angle is 30 degree is %.2f kV",Vd1);
printf("\nThe direct voltage output when commutation angle 20 and delay angle is 90 degree is %.2f kV",Vd2);
printf("\nThe direct voltage output when commutation angle 20 and delay angle is 150 degree is %.2f kV",Vd3);
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