Title: Fault-tolerant wide-range stabilisation of a power system

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

Addresses: Department of Electrical Engineering, University of Cairo, Giza 12613, Egypt. ' Department of Electrical Engineering, University of Cairo, Giza 12613, Egypt. ' Department of Electrical Engineering, University of Cairo, Giza 12613, Egypt. ' Department of Electrical Engineering, University of Cairo, Giza 12613, Egypt

Abstract: This paper considers the fault-tolerant stabilisation of a power system over a wide range of operating conditions via excitation and governor controllers. A simple technique is presented to maintain stability when both controllers act together and when either one of the two controllers fails. The dynamics of a power system operating at various loads is treated as an interval (uncertain) plant. The problem of designing power system controllers with a general structure, which stabilise the interval plant, is converted to a simple stabilisation problem for only four Kharitanov polynomials (as compared to the 16 plant theorem with first order controllers). A single machine infinite bus system is considered to demonstrate the suggested technique. Stability tests show the robustness of the proposed controller.

Keywords: fault tolerant control; robust control; power system stabilisation; Kharitonov polynomials; power systems; excitation; governor controllers; control design.

DOI: 10.1504/IJMIC.2008.019356

International Journal of Modelling, Identification and Control, 2008 Vol.3 No.2, pp.173 - 180

Available online: 08 Jul 2008 *

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