Resilient static output feedback power system stabiliser using PSO-LMI optimisation

Authors:
Hisham M. Soliman;Magdi Sadek Mahmoud
Affiliations:
Electrical Engineering Department, Cairo University, Giza 12613, Egypt;Systems Engineering Department, KFUPM, P.O. Box 5067, Dhahran 31261, Saudi Arabia
Venue:
International Journal of Systems, Control and Communications
Year:
2013

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Abstract

In this paper, two new power system stabiliser PSS designs are proposed. The first one is based on a combined particle swarm optimisation PSO with linear matrix inequality LMI optimisation thereby improving previous existing results. The property of PSO of not sticking into a local minimum is used to eliminate the conservativeness of the design result utilising the static output feedback SOF stabiliser within an iterative solution of LMIs. The proposed design provides robustness against uncertainties wherein power systems operations are changing continuously due to load changes. In addition to load variations, the second controller is based on a derived sufficient condition using PSO-LMIs optimisation in order to obtain a resilient PSS that takes into consideration controller's parameters uncertainty as well. The effectiveness of the algorithm is shown for a single machine infinite bus power system.