chp9ex4.m

solve power flows by gauss seidel method ans newton Rapson

Z = [ j*0.183   j*0.078    j*0.141
      j*0.078   j*0.148    j*0.106
      j*0.141   j*0.106    j*0.267]
DZ = Z(:, 3)-Z(:,1)
Z44 = -j*0.56+Z(1,1)+Z(3,3)-2*Z(1,3)
DZZ  =DZ*DZ.'/Z44
Zbus = Z - DZZ