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Author: search.filters.author.Ngamroo, I.Subject: search.filters.subject.Genetic algorithm

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    Inverse additive perturbation-based optimization of robust PSS in an interconnected power system with wind farms
    (2008-12-01)
    Cuk Supriyadi, A. N.
    ;
    Ngamroo, I.
    ;
    Kunakorn, A.
    ;
    Dechanupaprittha, S.
    ;
    Watanabe, M.
    This paper proposes a design of robust power system stabilizer (RPSS) based on inverse additive perturbation optimization in an interconnected power system with wind farms. In the design, system uncertainties are represented by the inverse additive model. The robust stability condition is used to form the optimization problem of PSS parameters. The structure of PSS is a conventional second-order lead-lag controller. The genetic algorithm is applied to solve the problem and achieve the PSS parameters. Simulation studies in the two-area four-machine system with wind farms confirm that the damping effect and robustness of the proposed PSS are superior to those of the compared PSS. © 2008 SICE.
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    Design of robust SVC for voltage control in an isolated wind-diesel hybrid power system
    (2008-10-06)
    Vachirasricirikul, S.
    ;
    Ngamroo, I.
    ;
    Kaitwanidvilai, S.
    This paper focuses on a new robust control design of Static Var Compensator (SVC) for voltage control in an isolated wind-diesel hybrid power system. The proposed method is based on the H<inf>∞</inf> loop shaping technique and genetic algorithm (GA). The structure of the controller is a proportional integral (PI) controller with single input. In the design, system uncertainties are modeled by a normalized coprime factorization. The performance and robust stability conditions of the designed system satisfying the H<inf>∞</inf> loop shaping are formulated as the objective function in the optimization problem. The GA is applied to solve an optimization problem and to achieve control parameters. Simulation studies show the effectiveness and robustness of the proposed method. © 2008 IEEE.
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    Robust pitch controller design in hybrid wind-diesel power generation system
    (2008-09-23)
    Cuk Supriyadi, A. N.
    ;
    Ngamroo, I.
    ;
    Kaitwanidvilai, S.
    ;
    Kunakorn, A.
    ;
    Hashiguchi, T.
    In this paper, the robust control design of pitch controller for frequency control in a hybrid wind-diesel power generation system is proposed. The structure of the pitch controller is a 1<sup>st</sup>-order lead-lag compensator. To take system uncertainties into account, the coprime factorization is applied in system modeling. To obtain the controller parameters, the performance and stability conditions of H<inf>∞</inf> loop shaping technique are used to formulate the optimization problem. The genetic algorithm is employed to solve the problem. Simulation studies show the frequency control effect and robustness of the proposed controller against system uncertainties in comparison with a variable structure pitch control. ©2008 IEEE.