Gravitational Search Algorithm based Real Power Loss Minimization using Ideal Region of Facts Devices

Abstract

Major goal of  power schemes is to give reliable power supply to the consumers with guaranteed quality. The voltage magnitude of buses in the power scheme maintained within  the prescribed boundary, would aid in the maintenance of power quality.  The transmission loss in the existing power system involves the tax income of  power sector at a considerable level. Number of methods are prescribed to reduce  transmission losses.  The ideal region of FACTS devices  like TCSC, STATCOM including UPFC is the prescribed methods to concentrate the losses and to improve the voltage magnitude. The  proposed work gives  the optimal arrangement of the region of STATCOM in the transmission scheme.  The weak buses are distinguished as the locations of STATCOM. Load flow analysis has been borne out using  the the Newton - Raphson method. After executing the Newton-Raphson analysis, weak buses are identified.  The recognition of weak bus, in the  large power system network is framed as an optimization problem.  To identify the weak bus and for the placement of STATCOM device, an algorithm like the Gravitational search  is proposed. The fitness function for a gravitational search algorithm is the main focus  in this work. The results show the improvement of bus voltages after the placement of STATCOM in the  power system which is having weak bus. The standard system for the proposed work is considered from IEEE 30 bus test case.