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Researches of the Impact of the Nominal Power Ratio and Environmental Conditions on the Efficiency of the Photovoltaic System: A Case Study for Poland in Central Europe

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  • Mariusz T. Sarniak

    (Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Plock, Poland)

Abstract

The paper analyzes a case study of the impact of changing the nominal power ratio ( NPR ) on the efficiency of a PV (photovoltaic) system located in Poland. In the first stage of the research, the acceptable range of variability for NPR was determined based on simulation calculations, taking into account the parameters of PV modules, inverter, and climatic conditions. The second stage was verification tests for two acceptable extreme cases, carried out based on the analysis of detailed data from the monitoring of PV installations. The results of the verification tests for the two considered periods of operation of the PV system with the change of the NPR coefficient from 82% to 98% resulted in an increase in the annual energy yield by 446.2 kWh. On the other hand, higher relative values of generated energy were obtained only for the months with the lowest insolation in December and in January by 8.2 and 6.04 kWh/kW p , respectively. Higher oversizing of the PV generator (for NPR = 82%) also resulted in an increase by 6.4% in the frequency of operation of the PV inverter in the largest power range (2250–2500 W) and a decrease by 3.7% in the frequency in the lowest power range (0–250 W) for the whole year.

Suggested Citation

  • Mariusz T. Sarniak, 2020. "Researches of the Impact of the Nominal Power Ratio and Environmental Conditions on the Efficiency of the Photovoltaic System: A Case Study for Poland in Central Europe," Sustainability, MDPI, vol. 12(15), pages 1-15, July.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:15:p:6162-:d:392404
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    7. Mariusz T. Sarniak & Jacek Wernik & Krzysztof J. Wołosz, 2019. "Application of the Double Diode Model of Photovoltaic Cells for Simulation Studies on the Impact of Partial Shading of Silicon Photovoltaic Modules on the Waveforms of Their Current–Voltage Characteri," Energies, MDPI, vol. 12(12), pages 1-10, June.
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    Cited by:

    1. Hatice Gül Sezgin-Ugranlı, 2025. "Photovoltaic System Performance Under Partial Shading Conditions: Insight into the Roles of Bypass Diode Numbers and Inverter Efficiency Curve," Sustainability, MDPI, vol. 17(10), pages 1-25, May.
    2. Beata Hysa & Anna Mularczyk, 2024. "PESTEL Analysis of the Photovoltaic Market in Poland—A Systematic Review of Opportunities and Threats," Resources, MDPI, vol. 13(10), pages 1-29, September.
    3. Ewelina Krawczak, 2023. "A Comparative Analysis of Measured and Simulated Data of PV Rooftop Installations Located in Poland," Energies, MDPI, vol. 16(16), pages 1-17, August.
    4. Slawomir Gulkowski & Ewelina Krawczak, 2024. "Long-Term Energy Yield Analysis of the Rooftop PV System in Climate Conditions of Poland," Sustainability, MDPI, vol. 16(8), pages 1-13, April.
    5. Ayat-Allah Bouramdane & Alexis Tantet & Philippe Drobinski, 2021. "Utility-Scale PV-Battery versus CSP-Thermal Storage in Morocco: Storage and Cost Effect under Penetration Scenarios," Post-Print hal-03344439, HAL.
    6. Mariusz T. Sarniak, 2021. "The Efficiency of Obtaining Electricity and Heat from the Photovoltaic Module under Different Irradiance Conditions," Energies, MDPI, vol. 14(24), pages 1-13, December.
    7. Ayat-allah Bouramdane & Alexis Tantet & Philippe Drobinski, 2021. "Utility-Scale PV-Battery versus CSP-Thermal Storage in Morocco: Storage and Cost Effect under Penetration Scenarios," Energies, MDPI, vol. 14(15), pages 1-43, August.
    8. Slawomir Gulkowski, 2022. "Specific Yield Analysis of the Rooftop PV Systems Located in South-Eastern Poland," Energies, MDPI, vol. 15(10), pages 1-20, May.
    9. Slawomir Gulkowski, 2023. "Modeling and Experimental Studies of the Photovoltaic System Performance in Climate Conditions of Poland," Energies, MDPI, vol. 16(20), pages 1-16, October.

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