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Power Quality Assessment in a Real Microgrid-Statistical Assessment of Different Long-Term Working Conditions

Author

Listed:
  • Anna Ostrowska

    (Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

  • Łukasz Michalec

    (Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

  • Marek Skarupski

    (Faculty of Pure and Applied Mathematics, Wrocław University of Science and Technology, 50-370 Wrocław, Poland)

  • Michał Jasiński

    (Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

  • Tomasz Sikorski

    (Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

  • Paweł Kostyła

    (Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

  • Robert Lis

    (Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

  • Grzegorz Mudrak

    (TAURON Dystrybucja S.A., 31-060 Kraków, Poland)

  • Tomasz Rodziewicz

    (TAURON Dystrybucja S.A., 31-060 Kraków, Poland)

Abstract

Power quality (PQ) becomes a more and more pressing issue for the operation stability of power systems with renewable energy sources. An important aspect of PQ monitoring of distribution networks is to compare the PQ indicators in different operating conditions. This paper evaluates the impact of a microgrid implementation in a real distribution network on power quality indicators at the point of common coupling in an LV network. The study includes a classical assessment of the long-term PQ parameters according to the EN 50160 standard, such as nominal frequency deviations, voltage RMS variations, voltage fluctuations (represented by long-term flicker severity), voltage unbalance and total harmonic distortion. The PQ evaluation is extended in statistical assessment based on cluster analysis. The case study contains 5 weeks of power quality observation results obtained at the assessment point in two different working conditions of the distribution system: before and after implementing the microgrid. The study allows establishing general conclusions regarding a microgrid interconnection in order not to exceed power quality limits and considering the influence of photovoltaic generation on power quality parameters.

Suggested Citation

  • Anna Ostrowska & Łukasz Michalec & Marek Skarupski & Michał Jasiński & Tomasz Sikorski & Paweł Kostyła & Robert Lis & Grzegorz Mudrak & Tomasz Rodziewicz, 2022. "Power Quality Assessment in a Real Microgrid-Statistical Assessment of Different Long-Term Working Conditions," Energies, MDPI, vol. 15(21), pages 1-26, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:8089-:d:958889
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    References listed on IDEAS

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    1. Rozmysław Mieński & Irena Wasiak & Paweł Kelm, 2023. "Integration of PV Sources in Prosumer Installations Eliminating Their Negative Impact on the Supplying Grid and Optimizing the Microgrid Operation," Energies, MDPI, vol. 16(8), pages 1-17, April.
    2. Hubert Kryszk & Krystyna Kurowska & Renata Marks-Bielska & Stanisław Bielski & Bartłomiej Eźlakowski, 2023. "Barriers and Prospects for the Development of Renewable Energy Sources in Poland during the Energy Crisis," Energies, MDPI, vol. 16(4), pages 1-17, February.

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