Power loss minimization in radial distribution network considering different load levels via AGPSO. Part–II: Using capacitors after DGS & reconfiguration [articol]

Abstract

Reactive power injection at the optimal nodes in the Radial Distribution Network (RDN) reduces the power loss which is one of the traditional methods. In the past decade, real power injection (DG) based power loss reduction with NR has been yield more power loss reduction than individual application of DG and NR. Reactive power injection along the DN after real power compensation (after DG allocation with NR) will achieve further power loss reduction. This paper proposes an application of Autonomous Group Particle Swarm Optimization (AGPSO) to solve the optimal capacitor problem in reconfigured DG integrated RDN with an objective to minimize power loss subject to satisfying operating constraints. Further, this paper considers optimal allocation and sizing of capacitors at three and four optimal locations under three different load levels (50%, 100% and 160%) to investigate the performance of the proposed method in gaining additional power loss reduction after optimal allocation of DGs with NR. This developed technique is demonstrated using two test systems (standard IEEE 33 and 69 bus). In the proposed method, considerable volume of additional power loss reduction is achieved and the bus voltage is enriched through the concurrent operation of capacitors in reconfigured DG compensated RDN.