Eigenvalue Assignments in Multimachine Power Systems using Multi-Objective PSO Algorithm

Yosra Welhazi, Tawfik Guesmi and Hsan Hadj Abdallah
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Yosra Welhazi: CEM Laboratory, National Engineering School of Sfax, University of Sfax, Sfax, Tunisia
Tawfik Guesmi: CEM Laboratory, National Engineering School of Sfax, University of Sfax, Sfax, Tunisia
Hsan Hadj Abdallah: CEM Laboratory, National Engineering School of Sfax, University of Sfax, Sfax, Tunisia

International Journal of Energy Optimization and Engineering (IJEOE), 2015, vol. 4, issue 3, 33-48

Abstract: Applying multi-objective particle swarm optimization (MOPSO) algorithm to multi-objective design of multimachine power system stabilizers (PSSs) is presented in this paper. The proposed approach is based on MOPSO algorithm to search for optimal parameter settings of PSS for a wide range of operating conditions. Moreover, a fuzzy set theory is developed to extract the best compromise solution. The stabilizers are selected using MOPSO to shift the lightly damped and undamped electromechanical modes to a prescribed zone in the s-plane. The problem of tuning the stabilizer parameters is converted to an optimization problem with eigenvalue-based multi-objective function. The performance of the proposed approach is investigated for a three-machine nine-bus system under different operating conditions. The effectiveness of the proposed approach in damping the electromechanical modes and enhancing greatly the dynamic stability is confirmed through eigenvalue analysis, nonlinear simulation results and some performance indices over a wide range of loading conditions.

Date: 2015
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