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Improvement of partial shading resilience of PV array though modified bypass arrangement

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  • Ghosh, Santosh
  • Yadav, Vinod Kumar
  • Mukherjee, Vivekananda

Abstract

Generation of hot spot, due to partial shading and other mismatch conditions, is associated with photovoltaic (PV) systems since its very early applications in satellites, but a simple, economic and effective solution is still unavailable. Conventional hot spot mitigation technique, using a bypass diode (BPD) across each sub-panel, reduces the reverse bias voltage only up to −12 V to −19 V across the shaded cell, which matches exactly with the voltage range at which avalanche breakdown of PV cells occur. Reverse breakdown of an acidic texturized PV cell occurs merely at −13 V and between −15 V and −20 V for alkaline texturized ones. Hence, the standard BPD based circuit is not effective enough in preventing reverse breakdown of PV cells and hot spot generation. In this paper, a modified bypass circuit is proposed which successfully strikes a balance between the increase in reliability through reduction of hot spot temperature and increase in complexity of bypass circuit. The experimental study and simulation reveal that the proposed bypass circuit effectively reduced hotspot temperature of the obscure cell below average temperature of the module, without increasing the power loss, system complexity and cost thereof, substantially.

Suggested Citation

  • Ghosh, Santosh & Yadav, Vinod Kumar & Mukherjee, Vivekananda, 2019. "Improvement of partial shading resilience of PV array though modified bypass arrangement," Renewable Energy, Elsevier, vol. 143(C), pages 1079-1093.
    • Handle: RePEc:eee:renene:v:143:y:2019:i:c:p:1079-1093
    DOI: 10.1016/j.renene.2019.05.062
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    References listed on IDEAS

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    1. Ahmad, R. & Murtaza, Ali F. & Ahmed Sher, Hadeed & Tabrez Shami, Umar & Olalekan, Saheed, 2017. "An analytical approach to study partial shading effects on PV array supported by literature," Renewable and Sustainable Energy Reviews, Elsevier, vol. 74(C), pages 721-732.
    2. Ghosh, Santosh & Yadav, Vinod Kumar & Mukherjee, Vivekananda, 2018. "Evaluation of cumulative impact of partial shading and aerosols on different PV array topologies through combined Shannon's entropy and DEA," Energy, Elsevier, vol. 144(C), pages 765-775.
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    Cited by:

    1. Yadav, Vinod Kumar & Yadav, Abhishek & Yadav, Ranjana & Mittal, Aaradhya & Wazir, Nadeem Hussain & Gupta, Shubham & Pachauri, Rupendra Kumar & Ghosh, Santosh, 2022. "A novel reconfiguration technique for improvement of PV reliability," Renewable Energy, Elsevier, vol. 182(C), pages 508-520.
    2. Ghosh, Santosh & Yadav, Vinod Kumar & Mukherjee, Vivekananda & Gupta, Shubham, 2021. "Three decades of Indian power-sector reform:A critical assessment," Utilities Policy, Elsevier, vol. 68(C).
    3. Zhang, Tao & Jiang, Jiahui & Chen, Daolian, 2021. "An efficient and low-cost DMPPT approach for photovoltaic submodule based on multi-port DC converter," Renewable Energy, Elsevier, vol. 178(C), pages 1144-1155.
    4. Fathy, Ahmed & Yousri, Dalia & Babu, Thanikanti Sudhakar & Rezk, Hegazy, 2023. "Triple X Sudoku reconfiguration for alleviating shading effect on total-cross-tied PV array," Renewable Energy, Elsevier, vol. 204(C), pages 593-604.
    5. Verma, Mandhir Kumar & Mukherjee, V. & Kumar Yadav, Vinod & Ghosh, Santosh, 2020. "Indian power distribution sector reforms: A critical review," Energy Policy, Elsevier, vol. 144(C).

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