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Performance Analysis of Interconnection and Differential Power Processing Techniques under Partial Shading Conditions

Author

Listed:
  • Evaldo Chagas Gouvêa

    (Department of Electrical Engineering, School of Engineering and Sciences, São Paulo State University (UNESP), Guaratinguetá 12516-410, Brazil)

  • Thais Santos Castro

    (Department of Mechanical Engineering, School of Engineering and Sciences, São Paulo State University (UNESP), Guaratinguetá 12516-410, Brazil)

  • Teófilo Miguel de Souza

    (Department of Electrical Engineering, School of Engineering and Sciences, São Paulo State University (UNESP), Guaratinguetá 12516-410, Brazil)

Abstract

Partial shading conditions can cause low output power, hotspots, and a reduced lifespan in photovoltaic arrays. Interconnection (IC) and differential power processing (DPP) can be used to mitigate these effects. When individually applied to an array, these techniques can significantly increase the generated power. A few authors studied the combined use of these schemes under specific conditions such as large-scale arrays or a complex combination of several techniques, making it difficult to identify the individual contribution of each technique. Here, we aimed to determine whether the combined use of a switching-inductor DPP circuit and a total-cross-tied interconnection scheme presents better performance than each standalone technique, using a small-scale photovoltaic array. An array was tested using IC, DPP, and a combination of both techniques, and the array was subjected to 13 shading patterns and two irradiance levels. The performance in each case was assessed using maximum output power, performance ratio, mismatch power loss, and power enhancement indicators. The results showed that a standalone differential power processing circuit presents better performance than when it is combined with an interconnection. The DPP showed performance ratio values of up to 97%, mismatch power losses lower than 36.9%, and a power enhancement of up to 95.9%. The standalone interconnection shows the worst performance among the three techniques.

Suggested Citation

  • Evaldo Chagas Gouvêa & Thais Santos Castro & Teófilo Miguel de Souza, 2024. "Performance Analysis of Interconnection and Differential Power Processing Techniques under Partial Shading Conditions," Energies, MDPI, vol. 17(13), pages 1-19, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:13:p:3252-:d:1427436
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    References listed on IDEAS

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    1. Hyunji Lee & Katherine A. Kim, 2018. "Design Considerations for Parallel Differential Power Processing Converters in a Photovoltaic-Powered Wearable Application," Energies, MDPI, vol. 11(12), pages 1-17, November.
    2. Bana, Sangram & Saini, R.P., 2017. "Experimental investigation on power output of different photovoltaic array configurations under uniform and partial shading scenarios," Energy, Elsevier, vol. 127(C), pages 438-453.
    3. Jianwei Mi & Jie Du & Chengjian Liu & Xintong Li & Yiqun Zhang & Guanheng Fan, 2023. "Design and Optimization of Photovoltaic System in Full-Chain Ground-Based Validation System of Space Solar Power Station," Energies, MDPI, vol. 16(7), pages 1-19, April.
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