Installation of capacitors in primary and secondary networks of distribution systems is one of the efficient methods for power loss reduction and voltage profile improvement. The loss of energy mainly incurred in the distribution network. The objective is to minimize the cost function along with power loss reduction and voltage profile improvement. Now a day this multi-objective problem creates a lot of concentration of the researcher. In this paper, a study based on two-stage procedure is presented. In the first stage, the optimum bus location is done by using a sensitivity index and voltage norm. In the second stage, Fruit Fly algorithm is used to optimize the size of the capacitor as well as bus location, a comparative study is made between Particle swarm optimization (PSO) and Fruit Fly optimization for solving the optimal capacitor problem. The Fruit Fly gives a better result in comparison with PSO for this optimization problem in terms of power loss and cost.

Backward sweep forward sweep, Radial distribution, Loss sensitivity Index, Voltage norm, Fruit Fly Optimization

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