The distribution network has characteristics different from the transmission system. Distribution

networks are commonly

1. three-phase unbalanced

2. radial with sometimes weakly meshed topology

3. with high resistance to reactance (r/x) rations

here, an equivalent current injection method is used in rectangular coordinates to analyse the given radial distribution system. The FDLF method uses the NR-algorithm, with a constant Jacobian matrix. This matrix is further decoupled into two identical sub-Jacobian matrices.