Power Factor Improvement in Radial Distribution System using Bionic Random Search Algorithm Abstract: For the efficient utilization of electrical power, power factor of the system must not be low. The good power factor results in reduction of losses and improvement of voltage profile of the system. To improve the power factor in a radial distribution system, bionic random search algorithm has been proposed using optimal capacitor placement. The proposed method is implemented on IEEE 15 bus radial distribution system. Keywords: Power Factor, Capacitor placement, capacitor sizing, optimal capacitor allocation, distribution system, technical losses, annual cost of the system, voltage profile, voltage improvement, PGSA, Random search algorithm, Bionic search. Tanuj Manglani Assistant Professor, Department of Electrical Engineering, YIT, Jaipur, India Y.S.Shishodia Pro. VC, JaganNath University, Jaipur, India ISSN 2319-9725