Abstract

A method for minimal losses in large primary distribution systems by changing topology is presented. The loss minimization in on-line condition in large real distribution systems is based on dynamic programming approach with graph compression technique and radial power flow. The dynamic programming naturally adapts to operational spanning tree configuration of primary networks and it is easy to implement. The principal characteristics of the proposed method are applications to large real systems and applicability to ill-conditioned systems. It considers all load type and it requires very low computational efforts. The model is useful for planning and operating in primary distribution systems. Through different test network applications, the method was validated and compared to other proposed methods. This paper shows two real network applications and the results show how powerful the method is when applied to large systems in very short times.