Optimal Siting and Sizing of DG in Balanced Radial Distribution Networks Using BFOA

Abstract

The distribution system is mainly radial, in that type of systems the voltage at nodes decreases when moving towards consumer end and I2R losses increase. Practical systems are becoming bulky and complicated which increase I2R losses and reduce voltage of nodes. So 13% of the total power generated is used as I2R losses. The best technique for power loss reduction in distribution systems is the DG installation, where the DG unitsare properly placed. The amount of power delivered hasbetter effects on the performance of the distribution system. The placement of a DG unit can form lots of advantages such as line losses minimization, stability improvement and voltage profile enhancement. The main objective of this thesis work is to allocatethe suitable size of the multiple DG’sat appropriate location,which minimizes total line losses of the distribution network. Therefore, the Backward / Forward Sweep algorithm for power flow calculation technique is used to calculate line losses for the radial network and constant power loading condition. In my thesis work, loss sensitivity factor is used to select the suitable location and bacterial foraging optimization is used to obtain the appropriate size of DG to minimize the line losses. The outcomes obtained by the proposed method have been compared with other techniques and tested with 69 node and 119 RDNs.