Distribution Network Performance Enhancement Through Optimal Sizing and Placement of D-STATCOM using Particle Swarm Optimization Technique (case study-Woldya Distribution Network)

This article presents the use of distribution static synchronous compensator (D-STATCOM) to improve distribution network performance by maintaining voltage profile, stability and reducing power losses. The study was conducted on a 7.2 MW Gonder ber feeder, which had an unacceptable voltage profile and high active and reactive power losses. Two methods were applied to assign the power control variables: bus-based voltage stability index analysis and particle swarm optimization (PSO). The optimal allocation was tested in different system cases. The results showed that a single installation of D-STATCOM improved system performance; with an improved voltage profile between 0.95 and 1.05p.u, increased voltage stability indices and reduced active and reactive power losses. Cost analysis of the proposed compensation scheme indicated a payback period of 1.8 years.