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Impact of Farm Biogas Plant Auxiliary Equipment on Electrical Power Quality

Author

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  • Zbigniew Skibko

    (Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45, 15-351 Bialystok, Poland)

  • Andrzej Borusiewicz

    (Department of Agronomy, Modern Technology and Informatics, International Academy of Applied Sciences in Lomza, 18-400 Lomza, Poland)

  • Jacek Filipkowski

    (Department of Agronomy, Modern Technology and Informatics, International Academy of Applied Sciences in Lomza, 18-400 Lomza, Poland)

  • Łukasz Pisarek

    (Department of Agronomy, Modern Technology and Informatics, International Academy of Applied Sciences in Lomza, 18-400 Lomza, Poland)

  • Maciej Kuboń

    (Department of Production Engineering, Logistics and Applied Computer Science, Faculty of Production and Power Engineering, University of Agriculture in Krakow, Balicka 116B, 30-149 Krakow, Poland
    Institute of Technical Sciences, Eastern European State College of Higher Education in Przemysl, Ksiazat Lubomirskich 6, 37-700 Przemysl, Poland)

Abstract

Devices that meet the needs of agricultural biogas plants represent a significant share of the energy balance of the source. The digester mixer is a crucial component installed in the fermentation chamber. Energy consumption during mixing depends on the regime and intensity, as well as the rheological properties of the carrier liquid, the dry matter content, and the dimensions of the fibers. Bioreactor operators often oversize mixers and extend mixing duration to avoid disruptions in biogas production. This paper analyzed the influence of digester mixer operations on selected electrical power quality parameters. For this purpose, two agricultural biogas plants with a capacity of 40 kW, connected to the low-voltage grid, were studied (one located approximately 120 m from the transformer station and the second 430 m away). As shown by the correlations presented in the article, the connection point of the biogas plant significantly impacted the magnitude of the influence of mixer operations on the analyzed voltage parameters. In the second biogas plant, switching on the mixers (in the absence of generation) caused the grid voltage to drop to the lower value permitted by regulations. (Switching on the mixers caused a change in voltage by about 30 V.) The most disturbances were introduced into the grid when the power generated by the biogas plant was equal to the power consumed by its internal equipment. (THD I then reached as high as 63.2%, while in other cases, it did not exceed 17%.) Furthermore, the operation of the mixers alone resulted in a reduction of approximately 1 MWh of energy exported to the power grid per month.

Suggested Citation

  • Zbigniew Skibko & Andrzej Borusiewicz & Jacek Filipkowski & Łukasz Pisarek & Maciej Kuboń, 2025. "Impact of Farm Biogas Plant Auxiliary Equipment on Electrical Power Quality," Energies, MDPI, vol. 18(14), pages 1-18, July.
  • Handle: RePEc:gam:jeners:v:18:y:2025:i:14:p:3849-:d:1705515
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    References listed on IDEAS

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    1. Magdalena Tymińska & Zbigniew Skibko & Andrzej Borusiewicz, 2023. "The Effect of Agricultural Biogas Plants on the Quality of Farm Energy Supply," Energies, MDPI, vol. 16(12), pages 1-18, June.
    2. Kevin Kiangebeni Lusimbakio & Tonton Boketsu Lokanga & Pierre Sedi Nzakuna & Vincenzo Paciello & Jean-Pierre Nzuru Nsekere & Obed Tshimanga Tshipata, 2025. "Evaluation of the Impact of Photovoltaic Solar Power Plant Integration into the Grid: A Case Study of the Western Transmission Network in the Democratic Republic of Congo," Energies, MDPI, vol. 18(3), pages 1-26, January.
    3. Singh, Buta & Szamosi, Zoltán & Siménfalvi, Zoltán, 2019. "State of the art on mixing in an anaerobic digester: A review," Renewable Energy, Elsevier, vol. 141(C), pages 922-936.
    4. Gulnar Gadirli & Agnieszka A. Pilarska & Jacek Dach & Krzysztof Pilarski & Alicja Kolasa-Więcek & Klaudia Borowiak, 2024. "Fundamentals, Operation and Global Prospects for the Development of Biogas Plants—A Review," Energies, MDPI, vol. 17(3), pages 1-26, January.
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