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//Book - Power system: Analysisi & Design 5th Edition
//Authors - J. Duncan Glover, Mulukutla S. Sarma, and Thomas J.Overbye
//Chapter-3 ;Example 3.9
//Scilab Version - 6.0.0; OS - Windows
clc;
clear;
Sb=300 //rated power of transformer in MVA
Vb1=13.8 // Terminal 1 base voltage in kV
Vb2=199.2 // Terminal 2 base voltage in kV
Vb3=19.92 // Terminal 3 base voltage in kV
X12old=0.10 //given per unit leakage reactance terminal 1 and 2
X13old=0.16 //given per unit leakage reactance terminal 1 and 3
X23old=0.14 //given per unit leakage reactance terminal 2 and 3
Sb12=300 //rated power corresponding to leakage reactance X12 in MVA
Sb13=50 //rated power corresponding to leakage reactance X13 in MVA
Sb23=50 //rated power corresponding to leakage reactance X23 in MVA
X12new=X12old*(Sb/Sb12) //new per unit leakage reactance terminal 1 and 2
X13new=X13old*(Sb/Sb13) //new per unit leakage reactance terminal 1 and 3
X23new=X23old*(Sb/Sb23) //new per unit leakage reactance terminal 2 and 3
X1=(1/2)*(X12new+X13new-X23new)
X2=(1/2)*(X12new+X23new-X13new)
X3=(1/2)*(X13new+X23new-X12new)
printf('The new per unit leakage reactance terminal 1 and 2 is %.4f pu\n',X12new);
printf('The new per unit leakage reactance terminal 1 and 3 is %.4f pu\n',X13new);
printf('The new per unit leakage reactance terminal 2 and 3 is %.4f pu\n',X23new);
printf('The per unit reactance of terminal 1 is %.4f pu\n',X1);
printf('The per unit reactance of terminal 2 is %.4f pu\n',X2);
printf('The per unit reactance of terminal 3 is %.4f pu\n',X3);
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