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Loss reduction through optimal placement of Unified Power-Flow Controller using Firefly Algorithm

P.RAMESH, Dr.M.DAMODARA REDDY

The aim of this paper is to reduce power loss and improve the voltage profiles in an electrical system in optimal manner. The flexible AC transmission system (FACTS) controllers such as Unified power flow controller (UPFC) can strongly improve the different parameters in a power system. UPFC can be used to improve voltage profiles, reduce line losses and increase line transmission capabilities. The optimized allocation of FACTS devices is an important issue, so the Voltage stability index (L-index) has been used in order to place UPFC in power system. The advantage of the L-index is to accelerate the optimization process. After placing the UPFC, Firefly optimization method is used for finding the rating of UPFC. The results obtained using Firefly optimization method is compared with Genetic Algorithm. To show the validity of the proposed techniques and for comparison purposes, simulation carried out on an IEEE- 14 Bus and IEEE- 30 Bus test system for normal and 150% loading conditions.