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Using Fractional Calculus in an Attempt at Modeling a High Frequency AC Exciter

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Advances in Non-Integer Order Calculus and Its Applications (RRNR 2018)

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 559))

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Abstract

The paper is an attempt of an application of the fractional order derivative in modeling of power system elements.

The electrical part of the generating unit contains, first of all, the power generator equipped with an excitation system. Three other components may be identified, when the electromachine excitation system is considered. This type of excitation uses an AC electric machine as an exciting device.

The mathematical model of high frequency AC exciter with additional regulator, being one of three possible submodels of electromagnetic excitation system model, was chosen intentionally and used as a simulation platform. The presented model in its simplicity includes all elements that characterise far more advanced and extended models, for example power generators. It contains gain factors and time constants as well as saturation components. Another important factor is that this particular model operates only using positive signals developed by an additional regulator. The paper presents the method and exemplary results of parameter estimation of the fractional model of the high frequency AC exciter with an additional regulator. To preserve full reliability of the computations, true waveforms measured in a power plant were used as input and output signals of the model. The advantages of applying fractional order calculus were verified by comparing measured and computed model output waveforms. Both integer and fractional order models were used in computations.

The aspect of filtering the recorded measurement signals is also presented in the paper.

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Author information

Authors and Affiliations

  1. Silesian University of Technology, 44-100, Gliwice, Poland

    Ɓukasz Majka

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  1. Ɓukasz Majka
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Correspondence to Ɓukasz Majka .

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Editors and Affiliations

  1. Faculty of Computer Science, Bialystok University of Technology, BiaƂystok, Poland

    Agnieszka B. Malinowska

  2. Faculty of Computer Science, Bialystok University of Technology, BiaƂystok, Poland

    Dorota Mozyrska

  3. Faculty of Electrical Engineering, Bialystok University of Technology, BiaƂystok, Poland

    Ɓukasz Sajewski

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Majka, Ɓ. (2020). Using Fractional Calculus in an Attempt at Modeling a High Frequency AC Exciter. In: Malinowska, A., Mozyrska, D., Sajewski, Ɓ. (eds) Advances in Non-Integer Order Calculus and Its Applications. RRNR 2018. Lecture Notes in Electrical Engineering, vol 559. Springer, Cham. https://doi.org/10.1007/978-3-030-17344-9_5

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