initial commit / add all books

2 files changed, 48 insertions, 0 deletions

diff --git a/3816/CH5/EX5.5/5_5.png b/3816/CH5/EX5.5/5_5.png
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+++ b/3816/CH5/EX5.5/5_5.png
diff --git a/3816/CH5/EX5.5/5_5.sce b/3816/CH5/EX5.5/5_5.sce
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+clc;

+clear;

+W1=500;

+R1=0.010;//Resistance

+XL1=0.05;//leakage reactance

+W2=750;

+disp('when both secondary voltages are 400V:')

+pf=0.8;//lag pf with 250KVA

+W3=250;

+R2=0.015;//Resistance value

+XL2=0.04;//Reactance value

+Z1=(R1+((XL1)*%i));

+Z2=(R2+((XL2)*%i));

+Z=Z1+Z2;

+disp(Z1,'The per unit impedance for common base value 500 KVA:')

+disp(Z2)

+disp(Z)

+theta=acos(0.8);

+S=W2*(pf-(sin(theta)*%i));

+S1=S*(Z2/Z);

+S2=S*(Z1/Z);

+SA=real(S1)+real(S2);//Real parts of the calculated power

+disp(SA,'The total active power is :')

+SR=W2*(sin(acos(0.8)));

+disp('When the open circuit secondary voltages are respectively 405 and 415')

+R3=0.0032;

+R4=0.0096;

+XL3=0.0160;

+XL4=0.0256;

+Z3=R3+((XL3)*%i);

+Z4=R4+((XL4)*%i);

+Z5=0.166+(0.125*%i);//Impedance value for the assured voltage 395V

+E1=405+(0*%i);

+E2=415+(0*%i);

+Ez=(E1/Z3)+(E2/Z4);

+Zo=(Z5*Z3*Z4)/((Z3*Z4)+(Z5*Z4)+(Z5*Z3));

+V=(Ez*Zo);

+disp(V,'The secondary terminal voltage is :')

+Vi1=E1-V;

+disp(Vi1,'The internal volt drop in the first transformer:')

+Vi2=E2-V;

+disp(Vi2,'The internal volt drop in the second transformer is :')

+I1=Vi1/Z3;

+I2=Vi2/Z4;

+S3=(340-(220*%i));

+S4=(270-(220*%i));

+S5=S1+S2;

+disp(S5,'The combined load is :')