initial commit / add all books

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+//to calculate syn chronous reactance ,leakage reactance,voltage regulation

+

+clc;

+If=[50 75 100 125 150 162.5 200 250 300];

+Voc=[6.2 8.7 10.5 11.6 12.8 13.7 14.2 15.2 15.9];

+plot(If,Voc);

+xlabel('If(A)');

+ylabel('Voc(V)');

+

+r=10*10^6;    //rating

+V=13000;

+Ia=r/(sqrt(3)*V);

+I_SC=688;    //corresponding to V

+Xs=V/(sqrt(3)*I_SC);disp(Xs,'sync reactance(ohm)');

+V_a=1200;

+Xl=V_a/(sqrt(3)*Ia);disp(Xl,'leakage reactance(ohm)');

+Ifar=90;

+Er=complex(V,sqrt(3)*Ia*Xl);

+If=185;    //corresponding to Er

+Iff=sqrt((If+Ifar*sind(40.5))^2+(Ifar*cosd(40.5))^2);

+Eff=15200;    //corresponding to Iff

+vr=(Eff/V-1)*100;disp(vr,'voltage regulation(%)');

+

+Xsadj=Xs*complex(.8,-.6);j=sqrt(-1);

+Ef=(V+sqrt(3)*Ia*Xsadj);

+If=(150/13)*abs(Ef);

+Vtoc=14800;    //corresponding to If

+vr=(Vtoc/V-1)*100;disp(vr,'voltage regulation(%)');