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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 3.8

+//Scilab Version - 6.0.0; OS - Windows

+

+clc;

+clear;

+

+Sr=200                                      //rated power of transformer in MVA

+VT1p=345                                    // rated voltage of transformer primary side in kV

+VT1s=34.5                                   // rated voltage of transformer secondary side in kV

+Xeq=0.08                                    // leakage reactance of transformer in ohms

+pf=0.8                                      //lagging power factor

+Irated=1.0                                  //rated current in Amperes

+Irated1=1.0*exp(%i*(-36.87)*(%pi/180))      //consider real and imaginary value of rated current

+VAN=1.0                                     //source voltage in Volts

+Vdrop=Irated*Xeq                            //per unit magnitudes of transformer voltage drop

+Van=VAN-(%i*Xeq)*Irated1                    //per unit magnitudes of transformer voltage at low voltage terminals 

+Isc=VAN/Xeq                                 //per unit magnitudes of transformer fault current

+

+

+printf('The magnitude of transformer voltage drop in per unit is %.4f pu \n',Vdrop);

+printf('The magnitude of transformer voltage at low voltage terminal in per unit is %.4f and its angle is %.4f degrees\n',abs(Van),atand(imag(Van),real(Van)));

+printf('The magnitude of fault current in per unit is %.4f pu\n',Isc);