Optimal re‐configuration of distribution network for loss reduction using non‐linear programming

This paper deals with the problem of optimizing radially operated meshed networks in order to obtain the radial configuration which satisfies the condition of minimum power losses and also the technical constraints normally adopted for such systems. After reporting the state of art on distribution network reconfiguration, the mathematical approach to the solution of the normal state re-configuration for loss reduction is presented, together with the non-linear optimization model. In the proposed model, sectionalizing switches are simulated as variable resistances. By starting from the meshed network obtained by closing all switches optimal solution is found directly; the solution is addressed towards the radial structure by some suitable constraints. To solve the problem, a suitable non-linear programming package is used. Finally some results referring to a hypothetical medium voltage test network are reported.