Електротехнички факултет [Научни радови] / Faculty of Electrical Engineering [Scientific papers]

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https://repozitorijum.ues.rs.ba/handle/123456789/53

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Прегледај Електротехнички факултет [Научни радови] / Faculty of Electrical Engineering [Scientific papers] по Аутор "Bošković, Marko Č."

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    A Comparative Study of Voltage, Peak Current and Dual Current Mode Control Methods for Noninverting Buck-Boost Converter
    (Academic Mind, Belgrade, 2016) Bošković, Marko Č.
    This paper presents a comparison of voltage mode control (VMC) and two current mode control (CMC) methods of noninverting buck-boost converter. The converter control-to-output transfer function, line-to-output transfer function and the output impedance are obtained for all methods by averaging converter equations over one switching period and applying small-signal linearization. The obtained results are required for the design procedure of feedback compensator to keep a system stable and robust. A comparative study of VMC, peak current mode control (PCMC) and dual-current mode control (DCMC) is performed. Performance evaluation of the closed-loop system with obtained compensator between these methods is performed via numerical simulations.
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    Novel tuning rules for PIDC controllers in automatic voltage regulation systems under constraints on robustness and sensitivity to measurement noise
    (ELSEVIER, 2024) Bošković, Marko Č.; Šekara, Tomislav B.; Stojić, Djordje M.; Rapaić, Milan R.
    This paper presents a novel analytical method for designing the Proportional-Integral-Derivative controller with serial Compensator (PIDC) for automatic voltage regulation (AVR). The primary focus of this method is to address constraints related to robustness and sensitivity to measurement noise. The key concept behind this proposed design method lies in selecting a specific complementary sensitivity function, which is determined by two adjustable parameters, λ affecting performance and N primarily affecting robustness to measurement noise. The ultimate goal of the PIDC controller design is to achieve enhanced rejection of load disturbances and ensure satisfactory reference tracking. The method proposed in this paper offers a combination of flexibility and simplicity, providing new analytical tuning formulas for PIDC controller based on a pair of adjustable parameters affecting the trade-off between performance and robustness. The paper thoroughly analyzes the dependencies of performance and robustness indices on the design parameters, elucidating the associated trade-offs in detail. A comparative analysis with respect to two recently proposed optimal design methods has been performed in a simulation setting. Subsequently, the effectiveness of the proposed analytical method has been experimentally validated using a small-scale synchronous generator in a laboratory setting. The application of the proposed approach, resulting in enhanced suppression of disturbances is improved, as evidenced by improvements in the Integral of Absolute Error (IAE). Additionally, the proposed design method demonstrated robustness against uncertainties in the plant model and the measurement noise.