EXPERIMENT – 6

OBJECT: - To perform unsymmetrical fault analysis.

CODEclcclear allz1=.2iz2=.2iz0=.05iEa=1a=-.5+.866iIb=17.32zf=input('Please Enter the value of zf');k=input('Enter 1 for 1LG, Enter 2 for LL, Enter 3 for 2LG Enter 4 for 3phase fault');switch(k) case 1Ia=(3*Ea/(z1+z2+z0+3*zf));If=Ia*Ib case 2Ia1=(Ea/z1+z2+zf);Ia2=((a*a-a)*Ia1);If=Ia2*Ib case 3Ia3=(Ea/z1+(z2*(z0+3*zf)/(z2+z0+3*zf)));Ia4=(-(Ea-Ia3*z1)/(z0+3*zf));Ia5=3*Ia4;If=Ia5*Ib case 4Ia6=Ea/z1;If=Ia6*Ibend[Theta,rho]=cart2pol(real(If),imag(If))a=Theta*180/pii=[rho a]

RESULT:-z1 = 0 + 0.2000iz2 = 0 + 0.2000iz0 = 0 + 0.0500iEa = 1a = -0.5000 + 0.8660iIb = 17.3200Please Enter the value of zf0Enter 1 for 1LG, Enter 2 for LL, Enter 3 for 2LG Enter 4 for 3phase fault1If = 0 -1.1547e+002iTheta = -1.5708rho = 115.4667a = -90i = 115.4667 -90.0000