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    Fo-pid controller design with sca for communication time delayed lfc
    (International Organization on 'Technical and Physical Problems of Engineering', 2020) Saka, Mustafa; Eke, Ibrahim; Gozde, Haluk; Taplamacioglu, M.C.
    In this paper, Sine Cosine Algorithm (SCA) is proposed and applied to load frequency control (LFC) of different type single area power systems. Reheat turbine system without communication time delayed is considered for the first system. Power systems have communication time delays because of far remote units (FRUs’), communication channels (CCs’), delays between plant units and etc. Communication time delays (CTDs) have negative affect on reliability and stability of power systems. For this reason, non-reheat turbine system having communication time delayed is considered. Both systems are controlled by fractional order proportional-integral-derivative controller (FO-PID). This controller has five controllable parameters. Thus, it is very flexible and very effective controller. Analyzed single area power systems for LFC are compared with recent literature studies. Founded outputs are examined according to settling time (%0.005 band width), overshoot, undershoot and peak to peak values of frequency deviation signals. These outputs are demonstrated that system performances highly enhanced with proposed FO-PID controller and SCA method. © 2020, International Organization on 'Technical and Physical Problems of Engineering'. All rights reserved.
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    Heuristic optimization based dynamic weighted state feedback approach for 2DOF PI-controller in automatic voltage regulator
    (Elsevier - Division Reed Elsevier India Pvt Ltd, 2021) Eke, Ibrahim; Saka, Mustafa; Gozde, Haluk; Arya, Yogendra; Taplamacioglu, M. Cengiz
    The intelligent, robust and reliable control of Automatic Voltage Regulator is essential to maintain a constant voltage level of synchronous generator working under different operating conditions. The heuristic optimization based 2DOF state-feedback PI-controller which regulates voltage output of synchronous generators markedly towards severe and continuous disturbances by using amplifier output as an additional feedback is a recent and powerful AVR strategy. In this study, to provide elasticity of dynamic response of this AVR scheme against relatively severe and continuous disturbances, its state-feedbacks are dynamically weighted by the flexible coefficients. Indeed, when the curves of the weight coefficients versus step disturbance are investigated, it is observed that while the disturbance increases, the weight coefficients also rise the effect of amplifier feedback automatically in order to regulate the voltage output of the AVR. The novel dynamic weighting approach increases the system performance between 9.48% and 19.65% for different working conditions. After robustness and stability analyses, a suggestion for real implementation scheme is presented and interpreted. (c) 2021 Karabuk University. Publishing services by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).