Optimal application of reclosers and sectionalisers to reduce non-distributed energy in distribution networks

This paper presents a method for optimal placement of reclosers and sectionalisers in overhead distribution networks to reduce Non-Distributed Energy (NDE) caused by permanent faults. The proposed algorithm uses an effective numbering method to determine the distribution network topology. This numbering method is very useful in the optimisation procedure and determination of savings achieved by reducing the non-distributed energy. Then a method is described for optimal placement of a recloser and sectionalisers in the network. Both voltage type and current type sectionalisers are considered at this stage. In the next stage, the optimal number of sectionalisers is determined based on economic considerations. Lastly, the validity of the presented method is evaluated by applying the algorithm on a typical Iranian 20 kV distribution feeder and the results are presented.