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    Wyświetlanie 1-4 z 4
    Tytuł:
    Towards optimal operation control in rural low voltage microgrids
    Autorzy:
    Parol, M.
    Rokicki, Ł.
    Parol, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/200413.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microgrids
    centralized control
    distributed control
    rural areas
    Opis:
    The paper raises the issue of controlling rural low voltage microgrids in an optimal manner. The impact of different criterion functions, related to the amount of energy exchanged with the distribution system operator network, the level of active power losses, the amount of energy generated by different energy sources and the value of financial performance measures regarding the microgrid operation, on the choice of operating points for devices suggested by the optimization algorithm has been analyzed. Both island and synchronous microgrid operation modes are being considered. We propose two variants of the optimization procedure: the first one is based on the particle swarm optimization algorithm and centralized control logic, and the second one takes advantage of the decentralized approach and Monte Carlo methods. A comparison of the simulation results for two sample rural microgrids, obtained for different objective functions, microgrid operation modes and optimization procedure variants, with the use of prepared algorithm implementations, has been provided. The results show that the proper choice of an objective function can have a crucial impact on the optimization algorithm’s behavior, the choice of operating points and, as a consequence, on microgrid behavior as well. The choice of the proper form of the objective function is the responsibility of the person in charge of both the microgrid itself and its operation. This paper can contribute towards making correct decisions in this area. Generally, slightly better results have been achieved for the centralized control mode of operation. Nevertheless, the results also suggest that in many cases the approach based on distributed logic can return results that are better or sufficiently close to the ones provided by the centralized and more sophisticated approach.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 4; 799-812
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effective approach to distributed optimal operation control in rural low voltage microgrids
    Autorzy:
    Parol, M.
    Kapler, P.
    Marzecki, J.
    Parol, R.
    Połecki, M.
    Rokicki, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/201003.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microgrids
    optimal operation
    distributed control
    rural areas
    Opis:
    The paper raises the issue of optimizing the control of the rural low voltage microgrids. Microgrids can operate in a synchronous mode with grids of distribution system operators and in an island mode. We can distinguish two control strategies in microgrids: one approach based on centralized control logic, which is usually used, and another on decentralized control logic. In this paper we decided to present the approach based on the distributed control, combining the efforts of the distributed cooperative control and modified Monte Carlo optimization method. Special attention has been paid to the impact of the order of processing particular devices’ groups on results of optimization calculations. Moreover, different scenarios of behavior of the microgrid control system with respect to the communication loss have been also presented. The influence of the issue of continuity of communication between particular devices’ groups on the possibility of carrying out the optimization process has been investigated. Additionally, characteristics of power loads and generation of electricity from small renewable energy appearing in rural areas have been described and the sensitivity of the optimization algorithm to the changes of demanded power values and changes of values of power generated by renewable energy sources has been studied. We analyzed different objective functions which can be can be used as an optimization goal both in synchronous and island operation modes of microgrid. We decided to intensively test our approach on a sample rural LV microgrid, which is typical in the countryside. The observed results of the tests have been presented and analyzed in detail. Generally, results achieved with the use of proposed distributed control are the same as with the use of centralized control. We think that the approach based on distributed control is promising for practical applications, because of its advantages.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 661-678
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of second-generation electromobility in public transport in Polish cities
    Rozwój elektromobilności II generacji w transporcie publicznym polskich miast
    Autorzy:
    Kołoś, Arkadiusz
    Fiedeń, Łukasz
    Taczanowski, Jakub
    Parol, Adam R.
    Gwosdz, Krzysztof
    Guzik, Robert
    Łodziński, Jakub
    Powiązania:
    https://bibliotekanauki.pl/articles/34656105.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Gdański. Komisja Geografii Komunikacji Polskiego Towarzystwa Geograficznego
    Tematy:
    electromobility in public transport
    zero emission bus
    low emission bus
    urban public transport
    Polish city
    elektromobilność transportu publicznego
    autobus zeroemisyjny
    autobus niskoemisyjny
    miejski transport publiczny
    polskie miasto
    Opis:
    Transport activities are a significant factor in environmental pollution, especially in cities. Therefore, measures aimed at electrification of public transport are particularly important. The aim of the paper is to present the origins, status and development dynamics of electromobility in Polish cities, especially the second generation of electromobility, i.e. vehicles that do not require continuous connection to the energy source. In practice the second-generation electric vehicles can be identified with battery-powered vehicles, hydrogen and hybrid vehicles. The study was prepared on the basis of an analysis of literature, industry documents or development strategies. In addition, a database of information on zero- and low-emission vehicles in public transport (i.e. electric and hybrid buses) was compiled to analyse the phenomenon. The study shows that the implementation of electromobility in Poland has already emerged from the initial phase. The possibilities for developing battery technology vary in cities of different sizes. In 2021 in Poland, the share of low-emission buses in the public transport fleet was several times higher than that of electric vehicles among passenger vehicles. It is most likely that the Polish road to electromobility leads primarily through public transport. The following factors influencing the development of electromobility were identified: these were primarily EU and Polish legislation and regulations, the presence of manufacturers of rolling stock and electrotechnical equipment, and – at the local scale – organisational, economic and social issues.
    Źródło:
    Prace Komisji Geografii Komunikacji PTG; 2023, 26(1); 22-39
    1426-5915
    2543-859X
    Pojawia się w:
    Prace Komisji Geografii Komunikacji PTG
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pseudo-random bit generators based on linear-feedback shift registers in a programmable device
    Autorzy:
    Parol, M.
    Dąbal, P.
    Szplet, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/114462.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    pseudo-random bit generators
    linear-feedback shift register
    programmable device
    Opis:
    We present the results of comparative study on three pseudo-random bit generators (PRBG) based on various use of linear-feedback shift registers (LFSR). The project was focused on implementation and tests of three such PRBG in programmable device Spartan 6, Xilinx. Tests of the designed PRBGs were performed with the use of standard statistical tests NIST SP800-22.
    Źródło:
    Measurement Automation Monitoring; 2016, 62, 6; 184-186
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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