Title: A robust power-system stabiliser design using swarm optimisation

Authors: Khaled A. El-Metwally, Abel-Latif Elshafei, Hisham M. Soliman

Addresses: Department of Electrical and Computer Engineering, Sultan Qaboos University, Muscat, Oman. ' Electrical Power and Machines Department, Cairo University, Giza, Egypt. ' Electrical Power and Machines Department, Cairo University, Giza, Egypt

Abstract: Synchronous generators in power systems are commonly equipped with Power System Stabilisers (PSS) to provide damping signals following disturbances. The design parameters of the PSS are load-dependent. The main objective of this paper is to design a simple robust PSS that can properly function over a wide range of operating conditions. The proposed compensator is designed by stabilising a finite number of characteristic polynomials that are obtained using Kharitonov theorem. The compensator|s parameters are tuned using a swarm optimisation technique to ensure maximum relative stability. Simulation results illustrate satisfactory performance of the PSS as it is applied to the original non-linear system under wide loading conditions at lagging and leading power factors.

Keywords: robust control; Kharitonov theorem; swarm optimisation, power system control; power system stabilisation; damping signals; disturbances; simulation.

DOI: 10.1504/IJMIC.2006.012614

International Journal of Modelling, Identification and Control, 2006 Vol.1 No.4, pp.263 - 271

Published online: 27 Feb 2007 *

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