Capacitive Compensation on Three Phase Unbalanced Radial Distribution System Using Index Vector Method

Shunt capacitive compensation is one of the techniques used to improve the voltage profile of the system and reduce active power loss. In this paper Index Vector method is implemented for optimal capacitor placement on three phase unbalanced radial distribution system. Mutual inductance between the phases is taken into consideration for obtaining load flow solution of unbalanced distribution system. Three phase load flow solution for 25 bus system is obtained by using topology based method. Proposed technique is compared with alternate methods. In the second method, potential locations are obtained by sensitivity analysis (Loss Sensitivity Factors, LSF) and sizing is done by Particle Swarm Optimization (PSO). It is concluded that index vector method is superior to LSF – PSO technique.