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Investigation of Small-Scale Photovoltaic Systems for Optimum Performance under Partial Shading Conditions

Author

Listed:
  • Mahmoud A. M. Youssef

    (Mechanical Engineering Department, Jouf University, Sakaka 72388, Saudi Arabia)

  • Abdelrahman M. Mohamed

    (Electrical Engineering Department, Minia University, Minia 61519, Egypt)

  • Yaser A. Khalaf

    (Electrical Engineering Department, Jouf University, Sakaka 72388, Saudi Arabia)

  • Yehia S. Mohamed

    (Electrical Engineering Department, Minia University, Minia 61519, Egypt)

Abstract

Not only are small photovoltaic (PV) systems widely used in poor countries and rural areas where the electrical loads are low but they can also be integrated into the national electricity grid to save electricity costs and reduce CO 2 emissions. Partial shading (PS) is one of the phenomena that leads to a sharp decrease in the performance of PV systems. This study provides a comprehensive performance investigation of small systems (consisting of ten modules or fewer) under all possible shading patterns that result from one shading level (300 W/m 2 is chosen). The most common configurations are considered for which a performance comparison is presented. Five small systems of different sizes are studied under PS. A new simplifying method is proposed to identify the distinct PS patterns under study. Consequently, the number of cases to be studied is significantly reduced from 1862 to 100 cases only. The study is conducted using the MATLAB/Simulink ® environment. The simulation results demonstrate the most outperformed configuration in each case of PS pattern and the amount of improvement for each configuration. The configurations include static series-parallel (SP), static total-cross-tied (TCT), dynamic switching between SP and TCT, and TCT-reconfiguration. The study provides PV systems’ owners with a set of guidelines to opt for the best configuration of their PV systems. The optimum recommended configuration is TCT reconfiguration, rather than dynamic switching between SP and TCT. The less recommended option, which enjoys simplicity but is still viable, is the static TCT. It outperforms the static SP in most cases of PS patterns.

Suggested Citation

  • Mahmoud A. M. Youssef & Abdelrahman M. Mohamed & Yaser A. Khalaf & Yehia S. Mohamed, 2022. "Investigation of Small-Scale Photovoltaic Systems for Optimum Performance under Partial Shading Conditions," Sustainability, MDPI, vol. 14(6), pages 1-45, March.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:6:p:3681-:d:776207
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    References listed on IDEAS

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    1. Radwan A. Almasri & Abdullah A. Alardhi & Saad Dilshad, 2021. "Investigating the Impact of Integration the Saudi Code of Energy Conservation with the Solar PV Systems in Residential Buildings," Sustainability, MDPI, vol. 13(6), pages 1-30, March.
    2. Reindl, K. & Palm, J., 2021. "Installing PV: Barriers and enablers experienced by non-residential property owners," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    3. Waleed Al Abri & Rashid Al Abri & Hassan Yousef & Amer Al-Hinai, 2021. "A Simple Method for Detecting Partial Shading in PV Systems," Energies, MDPI, vol. 14(16), pages 1-12, August.
    4. Malathy, S. & Ramaprabha, R., 2018. "Reconfiguration strategies to extract maximum power from photovoltaic array under partially shaded conditions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P2), pages 2922-2934.
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