Evaluation of additional Power loss reduction in DG integrated optimal Distribution Network

Distribution network (DN) is a very complex network facing several technical problems such as power loss, drop in bus voltage etc. During the past few decades, optimal allocation and sizing of capacitors have played a significant role in addressing the above issues. Power loss minimization considering single and two Distributed Generation (DG) units with and without Network Reconfiguration (NR) via Autonomous Group Particle Swarm Optimization (AGPSO) under five different cases has already been discussed. This paper proposes an application of AGPSO to solve the Optimal Capacitor Allocation Problem (OCAP) with an objective to achieve additional real power loss reduction after optimal allocation and sizing of single and two DGs with NR subject to satisfying equality and inequality constraints. Further, a comprehensive study has been conducted to ascertain the impact of capacitors on additional power loss minimization starting from single optimal node up to four nodes in the reconfigured DG integrated DN. This developed technique is demonstrated using the same two test systems (IEEE 33 and 69) that have been considered previously. The results obtained using AGPSO, reveal that the developed technique effectively achieves additional power loss suppression and enhancement in bus voltage.