Authors : A. Mahabuba and M. Abdullah Khan
Abstract: This study deals with the identification of best locations for placing the Power System Stabilizers (PSSs) in order to improve the overall dynamic stability of multimachine power systems using Relative gain Array (RGA) Analysis and Genetic Algorithm(GA) search technique. RGA is a simple and effective measure of interaction among the control loops in a Multi Input-Multi Output (MIMO) system. This study investigates the use of Relative Gain Array (RGA) for the selection of an appropriate set of manipulated variables to control a set of specified output through PSSs. The algorithm for identifying optimal location of PSS proposed in this paper uses the RGA in frequency domain computed at the frequency of the critical swing mode and rearranging the rows and columns of the RGA using an optimization search procedure guided by Genetic Algorithm (GA). The validity of the proposed algorithm is tested using a 5 machine, 8 bus test system and the results obtained demonstrate the effectiveness of the proposed algorithm.
A. Mahabuba and M. Abdullah Khan , 2008. Optimal Location of Power System Stabilizers in a Multi Machine Power System Using Relative Gain Array (RGA) and Genetic Algorithm (GA) . International Journal of Electrical and Power Engineering, 2: 19-27.