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Grid-connected isolated PV microinverters: A review

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  • Hasan, Rasedul
  • Mekhilef, Saad
  • Seyedmahmoudian, Mehdi
  • Horan, Ben

Abstract

Galvanic isolation in grid-connected photovoltaic (PV) microinverters is a very important feature concerning power quality and safety issues. However, high-frequency transformers and high switching losses degrade the efficiency of the isolated types of microinverters. Recently, several isolated topologies were proposed to increase the efficiency and lifetime of PV converters. This paper presents a comprehensive review of the most recent isolated topologies of PV microinverters. These topologies are categorized into two groups in terms of their power processing stages: 1) single-stage microinverter and 2) multi-stage microinverter. Various topologies are presented, compared, and scrutinized in terms of the power losses at different stages, control techniques, position of the decoupling capacitor, and cost analysis. Recommendations are provided to improve the existing topologies and select the suitable control techniques to obtain a clear picture of the framework for next-generation isolated PV microinverters.

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  • Hasan, Rasedul & Mekhilef, Saad & Seyedmahmoudian, Mehdi & Horan, Ben, 2017. "Grid-connected isolated PV microinverters: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 1065-1080.
    • Handle: RePEc:eee:rensus:v:67:y:2017:i:c:p:1065-1080
    DOI: 10.1016/j.rser.2016.09.082
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    7. Mehedi, I.M. & Salam, Z. & Ramli, M.Z. & Chin, V.J. & Bassi, H. & Rawa, M.J.H. & Abdullah, M.P., 2021. "Critical evaluation and review of partial shading mitigation methods for grid-connected PV system using hardware solutions: The module-level and array-level approaches," Renewable and Sustainable Energy Reviews, Elsevier, vol. 146(C).
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    11. Rehman, Shafiqur & Ahmed, M.A. & Mohamed, Mohand H. & Al-Sulaiman, Fahad A., 2017. "Feasibility study of the grid connected 10MW installed capacity PV power plants in Saudi Arabia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 80(C), pages 319-329.
    12. Chaiyan Jettanasen & Atthapol Ngaopitakkul, 2019. "Characteristics and Effects of Conducted Emission from Grid-Connected and Stand-Alone Micro-Inverters in a Nano-Grid Road Lighting System," Sustainability, MDPI, vol. 11(20), pages 1-14, October.
    13. Sridhar, V. & Umashankar, S., 2017. "A comprehensive review on CHB MLI based PV inverter and feasibility study of CHB MLI based PV-STATCOM," Renewable and Sustainable Energy Reviews, Elsevier, vol. 78(C), pages 138-156.
    14. Luis A. M. Barros & Mohamed Tanta & Tiago J. C. Sousa & Joao L. Afonso & J. G. Pinto, 2020. "New Multifunctional Isolated Microinverter with Integrated Energy Storage System for PV Applications," Energies, MDPI, vol. 13(15), pages 1-26, August.
    15. Ankit, & Sahoo, Sarat Kumar & Sukchai, Sukruedee & Yanine, Franco Fernando, 2018. "Review and comparative study of single-stage inverters for a PV system," Renewable and Sustainable Energy Reviews, Elsevier, vol. 91(C), pages 962-986.
    16. Hugo Valderrama-Blavi & Ezequiel Rodríguez-Ramos & Carlos Olalla & Xavier Genaro-Muñoz, 2019. "Sliding-Mode Approaches to Control a Microinverter Based on a Quadratic Boost Converter," Energies, MDPI, vol. 12(19), pages 1-24, September.
    17. Chaiyan Jettanasen & Atthapol Ngaopitakkul, 2019. "The Conducted Emission Attenuation of Micro-Inverters for Nanogrid Systems," Sustainability, MDPI, vol. 12(1), pages 1-31, December.
    18. Abou Houran, Mohamad & Salman Bukhari, Syed M. & Zafar, Muhammad Hamza & Mansoor, Majad & Chen, Wenjie, 2023. "COA-CNN-LSTM: Coati optimization algorithm-based hybrid deep learning model for PV/wind power forecasting in smart grid applications," Applied Energy, Elsevier, vol. 349(C).
    19. Ahmed Shawky & Mahrous Ahmed & Mohamed Orabi & Abdelali El Aroudi, 2020. "Classification of Three-Phase Grid-Tied Microinverters in Photovoltaic Applications," Energies, MDPI, vol. 13(11), pages 1-39, June.
    20. Saud Alotaibi & Ahmed Darwish, 2021. "Modular Multilevel Converters for Large-Scale Grid-Connected Photovoltaic Systems: A Review," Energies, MDPI, vol. 14(19), pages 1-30, September.
    21. Mao, Mingxuan & Zhang, Li & Duan, Pan & Duan, Qichang & Yang, Ming, 2018. "Grid-connected modular PV-Converter system with shuffled frog leaping algorithm based DMPPT controller," Energy, Elsevier, vol. 143(C), pages 181-190.

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